IEC 3A
An effective ground-fault current path has ___.I. continuity II. sufficient ampacity III. low impedance Select one: a.I & III only b.I only c.I, II & III d.I & II only e.II & III only f.III only
2020 NEC: 100_Effective Ground-Fault Current Path The correct answer is: I, II & III
Ground-fault circuit interrupters are designed to trip at current levels above ___. Select one: a.10 mA b.6 A c.6 mA d.20 A e.4 A
2020 NEC: 100_Ground-Fault Circuit Interrupter I-Note The correct answer is: 6 mA
Ground-fault circuit interrupters and ground-fault protection of equipment are equivalent terms. Select one: a.True b.False
2020 NEC: 100_Ground-Fault Circuit Interrupter | 2020 NEC: 100_Ground-Fault Protection of Equipment The correct answer is: False
Each 480-volt, three-phase, wye-connected feeder disconnect with a minimum rating of ___ amperes is required to be ground-fault protected. Select one: a.600 b.1500 c.1200 d.1000
2020 NEC: 215.10 The correct answer is: 1000
The requirements for grounding equipment in hazardous (classified) locations are found in NEC® Article ___. Select one: a.514 b.250 c.513 d.all of these
2020 NEC: 250 | 2020 NEC: 513 | 2020 NEC: 514 The correct answer is: all of these
Where used in a corrosive environment at a wastewater treatment plant, ___ equipment bonding jumpers are permitted.I. aluminum II. copper Select one: a.I only b.II only c.either I or
2020 NEC: 250.102(A) The correct answer is: II only
Section 250.102(E) permits an equipment bonding jumper to be installed ___. Select one: a.outside a raceway b.inside a raceway c.either a or b
2020 NEC: 250.102(E) The correct answer is: either a or b
Which part of Article 250 covers equipment grounding and equipment grounding conductors? Select one: a.I b.IV c.VI d.III
2020 NEC: 250.110 The correct answer is: VI
The requirement in Section NEC® 250.110, to ground equipment fastened in place or connected by a permanent wiring method, exempts which of the following? Select one: a.double-insulated equipment b.fire pumps c.portable electrical appliances d.none of these
2020 NEC: 250.110 Exc 1 The correct answer is: double-insulated equipment
This "gutter service" is to be built on the exterior back wall of a free-standing building. Two fused safety switches, one main breaker panelboard, and one MLO (main-lug-only) panelboard are installed above the gutter.The service shown in Figure 304.22 is 120/240-volt, 3Ø, 4-wire. Safety switch B is rated at 60 A and fused at 50 amps and will serve a 3-ph, 3-wire roof-top A/C. Although it will not be used by the A/C equipment, does the NEC® require that the neutral be installed between the switch and the gutter? Select one: a.Yes b.No
2020 NEC: 250.24(C) The correct answer is: Yes
A 480-volt, 3-phase service panel is to be installed to serve only 3-phase motors. The power company has set a pad-mounted 277/480-volt, 3Ø transformer for the new service. You will need to install which of the following between the transformer and the service panel?I. three ungrounded conductors II. one grounded conductor Select one: a.I only b.II only c.both I & II
2020 NEC: 250.24(C) The correct answer is: both I & II
The minimum size of a main bonding jumper selected from Table 250.102(C)(1) shall be ___. Select one: a.8 AWG b.6 AWG c.3/0 AWG when phase conductors are paralleled d.1/0 AWG
2020 NEC: 250.28(D)(1) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 8 AWG
All NEC® grounding requirements are covered in Article 250. Select one: a.True b.False
2020 NEC: 250.3 The correct answer is: False
A separately derived AC system ___ with any supply circuit conductor from another system. Select one: a.may share circuit conductors b.may share circuit devices c.does not share any circuit conductor d.all of these
2020 NEC: 250.30 I-Note The correct answer is: does not share any circuit conductor
Refer to Figure 303.04. In each raceway between the transformer and Switch 1, 350 kcmil conductors are installed.• Switch 3 is rated at 200 A, F 175 A with 2/0 AWG conductors installed to the wireway.• Switch 2 is rated at 60 A, F 60 A with 6 AWG conductors installed to the wireway.• The 200-A PB has a 200 A main with 3/0 AWG conductors run into the wireway.• The 100-A PB has a 100 A main with 3 AWG conductors run into the wireway.The SBJ and GEC to building steel can be installed in ___.I. the transformer II. Switch #1III. the wireway IV. Switches 2 & 3, the 100-A PB, and the 200-A PB Select one: a.I or II only b.I or II or III c.I only d.any of these e.none of these
2020 NEC: 250.30(A)(1) The correct answer is: I or II only
http://ieci.atplms.com/mod/quiz/review.php?attempt=8435479&cmid=2485251#:~:text=Question%20text-,The%20system%20bonding%20jumper%20and%20grounding%20electrode%20conductor%20are%20permitted%20to,II%20only,-Feedback
2020 NEC: 250.30(A)(1) The correct answer is: I or II only
When a transformer feeds a 120/208-volt, 3-phase, 4-wire main breaker panel, the system bonding jumper and grounding electrode conductor are required to be installed at ___. Select one: a.the transformer b.the panel c.both the transformer and the panel d.either the transformer or the panel
2020 NEC: 250.30(A)(1) The correct answer is: either the transformer or the panel
Refer to Figure 305.01. The smallest bonding jumper you can run with each conduit between the transformer and Switch #1 is ___ AWG. Select one: a.6 b.1/0 c.2/0 d.3/0 e.2
2020 NEC: 250.30(A)(2) | 2020 NEC: 250.102(C) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 1/0
Section 250.32(B) defines the grounding requirements for a grounded system supplying two or more buildings, and Section 250.32(C) defines the requirements for a(n) ___ system. Select one: a.impedance-grounded b.ungrounded c.solidly grounded d.inherently grounded
2020 NEC: 250.32(C) The correct answer is: ungrounded
Where a 3Ø, 4-wire main lug only panelboard in a building (of steel construction) is fed from another building, which action below is not required by 250.32(D)? Select one: a.A grounding electrode conductor must be run from the steel structure to the ground bar (where the branch circuit equipment grounding conductors are connected) in the panelboard. b.An equipment grounding conductor must be run with the feeder. c.The grounded conductor must be run with the 3Ø, 4-wire feeder. d.A main bonding jumper must be installed between the neutral bar and the ground bar in the panelboard.
2020 NEC: 250.32(D) The correct answer is: A main bonding jumper must be installed between the neutral bar and the ground bar in the panelboard.
NEC® Section 250.90 requires that equipment bonding jumpers be large enough to safely conduct the fault current to which they may be exposed. Select one: a.True b.False
2020 NEC: 250.90 The correct answer is: True
NEC® Article 250 covers requirements for the main bonding jumper used at services. Requirements for bonding of switchboards and panelboards used as service equipment are covered in Section 408.3(C). Select one: a.True b.False
2020 NEC: 408.3(C) The correct answer is: True
The requirements of NEC® Section 547.10 apply to ___.I. chicken farms II. dairy barns III. beef cattle feed lots Select one: a.I & II only b.III only c.II only d.II & III only e.I, II & III f.I only
2020 NEC: 547.10 The correct answer is: II & III only
The term equipotential plane refers to installations in which of the following types of buildings or facilities? Select one: a.aircraft fuel storage b.agricultural c.electronic data processing d.all of these
2020 NEC: 547.2 The correct answer is: agricultural
NEC® Section 547.5(F) specifically requires which of the following for an EGC? Select one: a.That it be copper b.That it be covered or insulated when installed underground c.That it is permitted to be bare when installed inside a building d.That it be installed in a metallic raceway
2020 NEC: 547.5(F) The correct answer is: That it be covered or insulated when installed underground
For Figure 309.72 with the SBJ removed from the panel, a meter would indicate ___ volts between points A and B. Select one: a.120 b.0
The correct answer is: 0
Detail 6 on BCES Drawing A8.1 is drawn using a scale of ___. Select one: a.1/8" = 1'-0" b.1/2" = 1'-0" c.1/4" = 1'-0" d.1" = 1'-0" e.11/2" = 1'-0"
The correct answer is: 1" = 1'-0"
Detail 1 on BCES Drawing A6.3 indicates that the brick face is ___ from the interior wall finish. Select one: a.1'-0" b.0'-5" c.0'-51/2" d.0'-101/2"
The correct answer is: 1'-0"
The east elevation of BCES Area D is shown in Detail ___. Select one: a.18/A7.1 b.23/A7.1 c.12/A7.1 d.not shown
The correct answer is: 23/A7.1
The casework elevation of the east wall in BCES Room B129 is shown in Detail ___. Select one: a.4/A8.1 b.9A/A8.1 c.14/A7.2 d.26/A8.2 e.not shown
The correct answer is: 4/A8.1
How many air handler units are located in Area B? Select one: a.5 b.2 c.6 d.3 e.4
The correct answer is: 5
___ shall be installed along each unprotected side or edge of a stairway. Select one: a.At least one handrail b.One stairrail system c.Both a and b d.Either a or b
The correct answer is: Both a and b
It is not required to verify that a circuit or equipment has been deenergized as long as all of the other steps of the lockout/tagout procedure have been performed. Select one: a.True b.False
The correct answer is: False
On building project drawings, references made to above finished floor and above floor are equivalent. Select one: a.True b.False
The correct answer is: False
The BCES finish schedule for Area B includes walls finished with ___.I. VWC II. FRP III. epoxy paint Select one: a.I only b.I & II only c.II only d.I, II & III e.II & III only f.I & III only
The correct answer is: I & II only
Where single-service cups are supplied, both a sanitary container for the unused cups and a receptacle for disposing of the used cups shall be provided. Select one: a.True b.False
The correct answer is: True
The floor finish in BCES Room D132 is ___. Select one: a.sealed concrete b.ceramic tile c.VCT d.carpet
The correct answer is: VCT
The abbreviation or symbol used for the unit of measurement for impedance is ___. Select one: a.VA b.Z c.W d.A e.V
The correct answer is: Z
The foreman only performs work outside the scope of the bid when ___. Select one: a.it is necessary to keep the job running b.a signed change order has been executed c.the work is less than $100 d.the project manager approves
The correct answer is: a signed change order has been executed
As an electrical job foreman, you should ___. Select one: a.be able to clearly communicate b.have technical skills c.have a leadership attitude d.all of these
The correct answer is: all of these
When installing underground duct banks, hazards can exist due to the presence of ___ in the soil. Select one: a.pesticides b.chemicals c.battery acid d.contaminants e.industrial sludge f.any of these
The correct answer is: any of these
When a fire is detected, the FSDs in the Computer Lab (Room B141) at BCES will ___. Select one: a.close b.open c.sound an alarm d.unlock the doors
The correct answer is: close
The resistance of a conductor is inversely proportional to its cross-sectional area. This means that the resistance ___ as the cross-sectional area of the conductor increases. Select one: a.decreases b.increases
The correct answer is: decreases
Among the job costs, the most costly line item is ___. Select one: a.depreciation of contractor-owned equipment b.material c.labor d.excavation for underground e.equipment rentals
The correct answer is: labor
Metal raceways enclosing GECs are considered to be on the ___ of the service equipment. Select one: a.load b.line
The correct answer is: line
Refer to Figure 308.7. The flex contains three each 14 AWG conductors for the 3-phase motor. The breaker enclosure contains a 30-A, 3-pole circuit breaker. The minimum size of the equipment grounding conductor from the breaker enclosure to the motor is ___ AWG. Select one: a.12 b.8 c.10 d.14 e.6
30 A 10 AWG vs. 14 AWG per 250.122(A)2020 NEC: 250.122(A) The correct answer is: 14
A 225 KVA, 480 delta to 208/120-volt, 3-ph, 4-w transformer is to be installed.• One set of secondary conductors is installed from the transformer to a 400-A MB panelboard. There will be two parallel conduits to this 400-A panel. Each conduit will contain 4 each 3/0 conductors.• A second set of secondary conductors is installed from the transformer to a 225-A MB panelboard. One conduit will be installed between this 225-amp panel and the transformer. The conduit will contain 3 each 4/0 ungrounded conductors and the smallest permitted size grounded conductor. Almost all the connected load is 3-phase.The smallest grounded conductor you can install in the conduit to the 225-A PB is ___ AWG. Select one: a.1/0 b.2/0 c.3/0 d.2 e.3
4/0 ungrounded 2 AWG grounded conductor The correct answer is: 2
What is the smallest EGC that can be installed in EACH conduit for a feeder? The feeder conductors are connected to a 3-pole 500-Amp breaker and are run in two separate conduits. Each conduit contains four 250 kcmil conductors. Select one: a.4 b.1/0 c.3 d.1 e.2
500 A 2 AWG2020 NEC: 250.122(F) | 2020 NEC: 250.122 (Table) The correct answer is: 2
A 250-amp, 480-volt, 3-ph, 3-wire feeder is installed underground in PVC from one building to deliver power to a 400-A safety switch (fused at 250 A) that is installed on another building. The feeder consists of three each 250 kcmil conductors for the "hots." The conduit will also contain an EGC. The smallest EGC conductor that can be installed is a ___ AWG. Neither the service nor the feeder is protected with a GFPE device. Select one: a.3 b.4 c.2 d.6 e.1
T.250.122 4 AWG2020 NEC: 250.32(B) The correct answer is: 4
Detail 1 on BCES Drawing A6.3 indicates that the brick ledge is ___ below the finish floor. a.0'-5" b.1'-0" c.0'-101/2" d.0'-51/2"
The correct answer is: 0'-5"
A conduit system of PVC and RMC was installed in the slab between the bottom of the panel and a metal switch box in the wall. A 15-amp branch circuit (including a "hot," a neutral, an EGC, and an isolated grounding conductor) was installed in the PVC/RMC. The receptacle shown here was connected and installed in the metal switch box and a stainless steel cover was installed on the receptacle.Figure 309.71 Refer to Figure 309.71. Using a voltmeter on the energized receptacle, your meter would indicate ___ volts if the leads were connected between points A and C.
The correct answer is: 120
For every 12 feet of vertical travel, stairways that are not a permanent part of the structure on which construction work is being performed shall have landings that are at least ___ inches in the direction of travel. Select one: a.30 b.12 c.120 d.60
The correct answer is: 30
The Multi-Employer Worksite Policy from OSHA categorizes employers into ___ roles. Select one: a.3 b.6 c.4 d.2
The correct answer is: 4
The receptacle shown on the north wall in BCES Room B108 should be mounted at ___ AFF, to center. a.18" b.40" c.36" d.44" e.38"
The correct answer is: 40"
Which of the following is not an example of a solidly grounded system? Select one: a.120/240-volt, three-phase, four-wire b.480-volt, three-phase, three-wire c.120/240-volt, single-phase, three-wire d.120/208-volt, three-phase, four-wire
The correct answer is: 480-volt, three-phase, three-wire
Refer to Figure 305.14. The 120-volt motor was operating when the conductor connected to L1 came into contact with the conductor connected to L2. The circuit breaker tripped because the short-circuit current traveled through conductors ___. Select one: a.F-C b.D-B-C c.C-B-D-E-F d.E-F-C e.D-B-A
The correct answer is: D-B-C
If you were to touch an energized ungrounded conductor and a grounded surface, ___.I. the circuit breaker will trip II. you will be shocked Select one: a.I only b.II only c.both I & II d.neither I or II
The correct answer is: II only
NFPA 70E® requires that CPR training be certified by the employer every ___ year(s). Select one: a.One b.Five c.Three d.Two
The correct answer is: One
At BCES, EF-1 is ON when AHU-1 is ON. Select one: a.True b.False
The correct answer is: True
Because the connection is a fusion of high conductivity, Furseweld® connections can withstand repeated fault currents, and will not loosen in the way that mechanical connectors can. Select one: a.True b.False
The correct answer is: True
Dampers are installed in ductwork to prevent or restrict air flow. Select one: a.True b.False
The correct answer is: True
If two points in a circuit have a voltage between them but are then bonded together with a conductive jumper (a wire for example), there is essentially no longer ___ between them. Select one: a.a difference of potential b.a voltage c.both a & b d.neither a nor b
The correct answer is: both a & b
Each utility provider shall be notified ___ of demolition operations. Select one: a.at the completion b.in advance
The correct answer is: in advance
Heat tracing ___ required by the BCES mechanical specs to be installed on the exterior chiller piping. Select one: a.is b.is not
The correct answer is: is
Past performance ___ a good indication of a foreman's potential. Select one: a.is b.is not
The correct answer is: is
The OSHA regulations set the minimum lighting level for different areas on construction sites. These levels are dependant upon the task being performed in the area. For example, ___ foot candles are required in an area used for offices than the number that would be required for storage. Select one: a.more b.less
The correct answer is: more
The point of division of line and load is located at the ___. Select one: a.load side of the meter base b.customer's side of the service head c.service point d.overcurrent devices in the service disconnecting means
The correct answer is: overcurrent devices in the service disconnecting means
A set of 3Ø feeder conductors are run under the concrete floor in PVC to feed a distribution panel in a remote part of a large building. If the conductors are size 1/0 AWG, protected on the supply end with a 150-ampere circuit breaker, the minimum size EGC permitted to be run with the circuit conductors is ___ AWG. Select one: a.10 b.6 c.4 d.3 e.8
150 A 6 AWG2020 NEC: 250.122(A) | 2020 NEC: 250.122 (Table) The correct answer is: 6
As shown in Figure 205.5, four parallel conduits will be installed for the service. Each conduit will contain three 3/0 AWG conductors for the ungrounded conductors and one 3/0 AWG conductor for the grounded conductor. The smallest MBJ that can be installed in the panel is a ___ AWG or kcmil. Select one: a.4/0 b.350 c.250 d.3/0 e.2/0
167,800 cm x 4 = 671,200 = 671.2 kcmil 2/0 AWG2020 NEC: 250.28(D) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 2/0
For portable tools used in other than residential occupancies, NEC® 250.114(4)(g) Exception allows the use of ___ in lieu of grounding. Select one: a.drain wires b.metallic shielding c.isolation transformers d.double insulation
2020 NEC: 250.114(4)(g) The correct answer is: isolation transformers
Which of following Code references lists permitted types of equipment grounding conductors? Select one: a.250.122(F)(2) b.310.4 c.250.124(A) d.250.118
2020 NEC: 250.118 The correct answer is: 250.118
Which of the following is not permitted to serve as an equipment grounding conductor? Select one: a.a metallic raceway b.a metallic cable sheath or armor c.a bare conductor included as part of a listed cable assembly d.a metallic water piping system
2020 NEC: 250.118 The correct answer is: a metallic water piping system
Some types of AC and MC cable are furnished with an integral ___ equipment grounding conductor for the purpose of establishing an isolated ground. Select one: a.covered b.bare c.insulated d.all of these
2020 NEC: 250.118 The correct answer is: insulated
When it is not feasible to install an equipment grounding conductor to a replacement grounding-type receptacle, 406.4(D)(2) lists alternatives for replacing a nongrounding-type receptacle. Select one: a.True b.False
2020 NEC: 250.130(C) I-Note | 2020 NEC: 406.4(D)(2) The correct answer is: True
Generally, the EGC for an AC circuit is required to be installed in the same raceway or cable as the circuit conductors. Select one: a.True b.False
2020 NEC: 250.134(B) The correct answer is: True
Section 250.138 permits all the following methods of grounding cord-and-plug-connected equipment, except for ___. Select one: a.a separate wire b.a bare or insulated wire or strap c.an equipment grounding conductor contained in the raceway, cable, or cord supplying the equipment d.a three- to two-prong attachment plug adapter
2020 NEC: 250.138 The correct answer is: a three- to two-prong attachment plug adapter
NEC® Sections 250.20, 250.21, and 250.22 state when a system is required, permitted, or not permitted to be grounded. Which of these transformer secondaries is required to be grounded?I. 120 to 12 volt AC transformer installed outside overhead to tree-mounted, low-voltage lightingII. 480 to 120/240 VAC, 1Ø, 3-wire to a panelboardIII. 480 to 120 VAC for a motor control circuit Select one: a.I, II & III b.I & III only c.I & II only d.II & III only e.I only
2020 NEC: 250.20 | 2020 NEC: 250.21(A) The correct answer is: I, II & III
High-impedance grounded neutral systems require the installation of ground detectors. Select one: a.True b.False
2020 NEC: 250.36 The correct answer is: True
Potential difference is a value measured in ohms. Select one: a.True b.False
The correct answer is: False
Ladders shall be inspected by a competent person and be clean and in good repair with no broken steps, braces or missing parts. Select one: a.True b.False
The correct answer is: True
In addition to his project manager, the electrical job foreman interacts with ___ on a construction project. Select one: a.other trades b.estimators c.inspectors d.all of these
The correct answer is: all of these
OSHA defines a competent person as someone who ___. Select one: a.is capable of identifying existing and predictable hazards in the surroundings b.is capable of identifying working conditions which are unsanitary, hazardous or dangerous to employees c.has the authority to make prompt corrective actions to eliminate hazards d.all of these
The correct answer is: all of these
Prior to permitting employees to start demolition operations, an engineering survey shall be made by a competent person to determine ___. Select one: a.the condition of the framing, floors, and walls within the structure b.the possibility of unplanned collapse of any portion of the structure c.both a and b
The correct answer is: both a and b
If employees are required to handle or use ___, they shall be trained regarding the safe handling and use of these. Select one: a.poisons b.caustics c.either a or b d.neither a nor b
The correct answer is: either a or b
As associated with mechanical drawings, HVAC is an abbreviation for ___. Select one: a.high-voltage alternating current b.high-volume air compressor c.heating, ventilation, and air conditioning d.hot valve actuating cylinder
The correct answer is: heating, ventilation, and air conditioning
During periods of ground fault, a circuit that utilizes large circuit conductors will have a ___ level of fault current than a circuit with small conductors. Select one: a.lower b.higher
The correct answer is: higher
It is the ___ responsibility to interface with the other trades. Select one: a.project manager's b.job foreman's c.both a and b d.neither a nor b
The correct answer is: job foreman's
The general contractor is hired by the ___. Select one: a.architect b.owner
The correct answer is: owner
Refer to Figure 303.04. The conductors between the transformer and Switch 1 are best described as ___ conductors. Select one: a.tap b.secondary c.service d.branch circuit
The correct answer is: secondary
The foreman ___ decide which safety rules apply to a job. a.can b.cannot
b.cannot
The boxes shown in Figure 309.74 will be set back about 1/8 inch from the face of a sheetrock wall. Where self-grounding 120-volt duplex receptacles are to be installed at each box, does the NEC® require the ground at the last box (on the right side) to be bonded to this box where the ground WAS bonded to the first box? Select one: a.Yes b.No
2020 NEC: 250.148 The correct answer is: Yes
Which of the following Code sections deal(s) with grounding provisions for nonmetallic boxes? Select one: a.Sections 250.148(B) and 310.4 b.Sections 250.4(A)(2) and 250.122 c.Sections 250.148(D) and 314.3 Exception No. 1 d.None of these
2020 NEC: 250.148(D) | 2020 NEC: 314.3 Exc 1 The correct answer is: Sections 250.148(D) and 314.3 Exception No. 1
The secondary of a transformer delivers 12 volts. One of these secondary conductors must be grounded when the supply voltage to the transformer is from a ___. I. 2-pole breaker in a 120/208-volt, 3Ø, 4-wire panelboardII. 1-pole breaker in a 277/480-volt, 3Ø, 4-wire panelboard Select one: a.I only b.II only c.either I or II d.neither I nor II
2020 NEC: 250.20(A)(1) The correct answer is: II only
Which generator shown in Figure 304.03 would be considered a separately derived system? Select one: a.I only b.II only c.both I and II d.neither I nor II
2020 NEC: 250.30 I-Note The correct answer is: II only
The definition of an equipment grounding conductor in the NEC® generally covers many different concepts and parts of a grounding system. Select one: a.True b.False
2020 NEC:100_Grounding Conductor; Equipment (EGC) 2020 NEC:100_Grounding Electrode Conductor The correct answer is: True
The Approach boundaries are viewed as a barrier extending ___ degrees around an exposed energized conductor or circuit part. Select one: a.270 b.90 c.360 d.180
The correct answer is: 360
The floor finish in BCES Room D122 is ___.I. ceramic tile II. carpet III. VCT a.I only b.II only c.II & III only d.I & II only e.I, II & III f.III only
The correct answer is: II & III only
Subpart T of OSHA's standards for construction covers ___-type demolition operations. Select one: a.manual b.explosive c.either a or b
The correct answer is: manual
Refer to Figure 205.5. Panel A serves the following loads: 300 amps of 480-volt, 3Ø loads. 264 amps of 277-volt loads are connected to AØ, 324 amps of 277-volt loads are connected to BØ, and 456 amps of 277-volt loads are connected to CØ. The BØ conductor in each of the parallel conduits will carry ___ amps. Select one: a.156 b.81 c.90 d.124 e.208
(300 + 324) ÷ 4 = 156 amps The correct answer is: 156
The box for the receptacle connected to circuit 2 on the west wall in BCES Room A120 should be roughed in at ___ inches above the finished floor. Select one: a.40 b.18 c.24 d.30 e.34
2'-6" + 4" + 6" = 40" The correct answer is: 40
Which of the following conditions would be classified as an overcurrent?I. a 36-A noncontinuous load connected to a 40-A fuseII. an ungrounded conductor touching a grounded conductorIII. an ungrounded conductor touching a grounded metal enclosure Select one: a.I, II & III b.I & II only c.I only d.II only e.II & III only
2020 NEC: 100_Overcurrent The correct answer is: II & III only
NEC® Section 110.9 requires that electrical equipment ___. Select one: a.have ground-fault circuit-interrupter circuit breakers b.intended to interrupt fault current be so rated c.be oversized to reduce damage caused by ground faults d.be constructed to minimize the effects of direct shorts
2020 NEC: 110.9 The correct answer is: intended to interrupt fault current be so rated
Which of the following articles in the NEC® contain(s) requirements for GFCI protection of receptacles? Select one: a.517 b.210 c.511 d.590 e.all of these
2020 NEC: 210 | 2020 NEC: 511 | 2020 NEC: 517 | 2020 NEC: 527 The correct answer is: all of these
The rating of a branch circuit is determined by ___. Select one: a.conductor size b.whether the circuit is series or parallel c.Article 220 calculations d.size of overcurrent protective device
2020 NEC: 210.3 The correct answer is: size of overcurrent protective device
When a 120 to 12-volt, AC transformer is a component of a low-voltage lighting system, ___ secondary conductor(s) is/are permitted to be grounded. Select one: a.neither b.either c.both
2020 NEC: 250.22(4) The correct answer is: neither
Which of the following statements does NOT describe objectionable current? Select one: a.Neutral current flowing over cable shields b.Neutral current flowing over metal conduit c.Neutral current flowing over the neutral conductor d.Neutral current flowing over the equipment grounding conductor
2020 NEC: 250.6 The correct answer is: Neutral current flowing over the neutral conductor
Equipment grounding conductors installed in raceways for isolated ground receptacles are required to be continuous, without joints or splices. Select one: a.True b.False
2020 NEC: 250.96(B) The correct answer is: False
Equipment grounding conductors installed in raceways for isolated ground receptacles are required to ___. Select one: a.be continuous, without joints or splices b.be copper c.be insulated d.have green insulation without stripes e.all of these
2020 NEC: 250.96(B) The correct answer is: be insulated
NEC® Section 547.5(F) permits an EGC to be ___. Select one: a.copper b.copper-clad aluminum c.aluminum d.any of these
2020 NEC: 547.5(F) The correct answer is: any of these
An 80-amp feeder is installed to supply power from a distribution point to an agricultural barn. The feeder conductors are 4 AWG. The EGC is required to be ___ AWG or larger. Select one: a.6 b.8 c.10 d.4
2020 NEC: 547.9(B)(3) The correct answer is: 4
Refer to Figure 304.06. The MBJ must be at least a ___ AWG or kcmil. Select one: a.2 b.350 c.2/0 d.1 e.3/0 f.1/0
350 kcmil x 2 = 700 kcmil 2/0 AWG2020 NEC: 250.24(C)(1) | 2020 NEC: 250.24(C)(2) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 2/0
Refer to Figure 308.23. The minimum size of the EGC between the panel and the pull box is ___ AWG. Select one: a.1 b.2 c.4 d.1/0 e.3
400 A 3 AWG2020 NEC: 250.122(C) The correct answer is: 3
Panel B, shown in Figure 205.4, is a 120/240-volt, 1-ph, 3-wire service panelboard. Panel B contains a 700-Amp, 2-pole main breaker. There is one 500 kcmil ungrounded conductor for AØ in each conduit and one in each conduit for BØ. There is also a grounded conductor in each conduit. The smallest main bonding jumper that can be installed is a ___ AWG. Select one: a.3 b.1/0 c.2/0 d.1 e.2
500 x 2 = 1000 kcmil 2/02020 NEC: 250.28(D) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 2/0
The 3-phase load shown in Figure 308.24 is connected to a 3-pole, 600-A circuit breaker. There are three 350 kcmil conductors in each run of RMC. The smallest EGC that can be installed in each conduit is ___ AWG. Select one: a.1 b.3 c.4 d.2 e.6
600 A 1 AWG2020 NEC: 250.122 The correct answer is: 1
A 1-phase load is operating at 208 volts. If you were working on the energized equipment and touched one of the "hot" terminals with your left hand and the other "hot" terminal with your right hand, how much current would flow through your body? Your body resistance is 5 k Ω and the equipment has an impedance of 23 Ω. Select one: a.9.13 A b.42 mA c.22.9 A d.35.4 A e.24 mA
Ibody = 208 ÷ 5,000 = .0416 amps = 42 mA The correct answer is: 42 mA
A ___ would be considered a source of a separately derived system. Select one: a.utility company pole-mounted 150 KVA, 277/480-V transformer bank b.5 KW, 120/240-V, 1Ø generator, fed through a 2 pole transfer switch c.both a and b d.neither a nor b
Per article 100, services are not considered a seperately derived system. A two pole transfer switch implies that only the phase conductors are being switched, therefore the neutrals are still connected. The correct answer is: neither a nor b
If the resistance of the body is 100 ohms, how much current would pass through the body when connected to a 120-volt circuit? Select one: a.12 A b.10 mA c.10 amps d.1.2 amps
The correct answer is: 1.2 amps
A conduit system of PVC and RMC was installed in the slab between the bottom of the panel and a metal switch box in the wall. A 15-amp branch circuit (including a "hot," a neutral, an EGC, and an isolated grounding conductor) was installed in the PVC/RMC. The receptacle shown here was connected and installed in the metal switch box and a stainless steel cover was installed on the receptacle.Figure 309.71 Refer to Figure 309.71. Using a voltmeter on the energized receptacle, your meter would indicate ___ volts, if the leads were connected between point C and the metal cover.
The correct answer is: 120
In a 120/208-volt, 3-phase, 4-wire system, the maximum voltage to ground is ___. Select one: a.208 volts b.120 volts c.277 volts d.240 volts e.none of these
The correct answer is: 120 volts
An 1800-A, 120/208-volt, 3Ø, 4-wire service is to be installed underground using 6 paralleled Schedule 40 PVC conduits. The service equipment will be a fused switchboard. The minimum size of the aluminum main bonding jumper for this service is ___ AWG or kcmil. All conductors are THHN/THWN aluminum. Select one: a.4/0 b.400 c.500 d.3/0 e.250
The correct answer is: 400
During demolition operations, debris dropped through holes in floors requires these openings to be barricaded at ___ inches above the working level and at least 6 feet back from the edge of the holes. Select one: a. 96 b. 42 c. 72 d. 60
The correct answer is: 42
NEC® Articles ___ provide classification and installation standards for the use of electrical equipment in hazardous locations. Select one: a.500 through 516 b.600 through 626 c.660 through 675
The correct answer is: 500 through 516
Temporary electric splices are to be insulated and inaccessible. When these splices are more than ___ feet above the floor, they are considered to be inaccessible. Select one: a.16 b.8 c.12 d.10 e.61/2
The correct answer is: 8
Refer to Figure 305.14. If the conductor connected to L2 inside the 240-volt motor enclosure came into contact with the metal enclosure, the ground-fault current would travel through conductors ___ to cause the 2-pole circuit breaker to trip. Select one: a.F-A b.A-C c.C-B-D-E-F d.E-D-B-A e.E-F-C
The correct answer is: E-D-B-A
AHUs at BCES are to be connected using ___. Select one: a.LFMC b.RMC c.FMC d.EMT e.any of these
The correct answer is: FMC
A single-phase transformer is supplied from a 480-volt circuit and delivers power to a 120-volt load. The secondary conductors are fused. If one of the secondary conductors is connected to a grounding electrode, the secondary fuses will open. Select one: a.True b.False
The correct answer is: False
The grounded secondary conductor shown at ___ below is correctly identified as the neutral. Select one: a.I, II & III b.I & III only c.none of these d.II only e.II & III only Feedback
The correct answer is: II & III only
Where located on the load side of a service point, ___ is/are considered to be part of a premises wiring system. I. factory-installed wiring inside a dishwasherII. branch-circuit conductors to temporary luminairesIII. feeder conductors to a subpanel Select one: a.III only b.I & II only c.I, II & III d.II & III only e.I & III only
The correct answer is: II & III only
Typically, textile mills, cotton gins, seed mills, and flax-producing plants are Class ___ hazardous locations. Select one: a.III b.IV c.I d.II
The correct answer is: III
___ note 17 on BCES Drawing A2.2 denotes a vending machine. Select one: a.General b.Keyed
The correct answer is: Keyed
A five-wire system consists of a grounded, three-phase system and includes one insulated grounded and one insulated grounding conductor. Select one: a.True b.False
The correct answer is: True
A qualified person must be trained in the skills and techniques to determine nominal voltage. Select one: a.True b.False
The correct answer is: True
A solidly grounded system is one where one of the current-carrying conductors is intentionally connected to the earth. Select one: a.True b.False
The correct answer is: True
The specifications and plans are provided by the ___. Select one: a.owner b.site superintendent c.architect d.project manager
The correct answer is: architect
Free-standing temporary light stands ___ permitted to be used on construction sites. Select one: a.are not b.are
The correct answer is: are
Any container used to distribute drinking water on a jobsite shall ___. Select one: a.not be used for any other purpose b.be clearly marked as to the nature of its contents c.both a and b
The correct answer is: both a and b
Batter boards can be used as a reference to determine ___. Select one: a.building lines b.finish floor levels c.both a and b d.neither a nor b
The correct answer is: both a and b
Before permitting any employees to begin work, employers shall provide and install the stairways and ladders with any ___ system as required. Select one: a.fire suppression b.anti-gravity c.containment d.fall protection
The correct answer is: fall protection
The sum of all three components of current opposition is referred to as ___. Select one: a.reactance b.impedance c.resistance d.capacitance e.inductance
The correct answer is: impedance
At BCES, EF-2 is located ___ above the toilet it serves. Select one: a.on the roof b.in the ceiling
The correct answer is: on the roof
The walls in BCES Mechanical Room C109 are ___. Select one: a.painted CMUs b.painted sheetrock c.VWC over sheetrock d.none of these
The correct answer is: painted sheetrock
To provide convenience receptacles and lighting for temporary construction sites, a minimum of ___ circuits are required. Select one: a.two b.one c.three d.five
The correct answer is: two
Potential difference is a value measured in ___. Select one: a.amps b.ohms c.volts d.watts
The correct answer is: volts
NEC® Sections 250.20, 250.21, and 250.22 state when a system is required, permitted, or not permitted to be grounded. Which of these transformer secondaries is not permitted to be grounded?I. the output conductors from a fluorescent ballast supplied from a 120-V circuitII. 120 to 12-volt AC transformer for a low-voltage lighting systemIII. 480 to 120-VAC for a motor control circuit Select one: a.I only b.I, II & III c.I & III only d.II & III only e.I & II only
The fluorescent autotransformer is supplied from a grounded circuit.2020 NEC: 250.22 The correct answer is: I & II only
A 1-phase load is operating at 277 volts. If you were working on the energized equipment and touched one of the "hot" terminals with your left hand and the neutral with your right hand, how much current would flow through your body? Your body resistance is 5 K Ω and the equipment has an impedance equal to 23 Ω. Select one: a.12.1 A b.12.04 A c.55.4 mA d.41.4 mA e.22.9 A
Ibody = 277 ÷ 5000 = .0554 amps = 55.4 mA The correct answer is: 55.4 mA
For Figure 309.73, a meter would indicate ___ ohms between points B and C. Select one: a.∞ (or OL on a digital meter) b.0
The correct answer is: 0
Detail 1 on BCES Drawing A6.3 indicates that the brick ledge is ___ below the finish floor. Select one: a.0'-101/2" b.0'-51/2" c.0'-5" d.1'-0"
The correct answer is: 0'-5"
As a consideration for the fire alarm horn/strobe outlet box installation in BCES Room B114, the stud-to-finish dimension is ___. a.5/8" b.17/8" c.11/8" d.11/4" e.1"
The correct answer is: 5/8"
The approximate length of one of the service feeder conductors between the pad-mount transformer and the main distribution board (MSB) is ___ feet. Select one: a.84 b.42 c.21 d.340 e.170
The correct answer is: 84
An arc flash hazard analysis is used to determine ___. Select one: a.The required PPE b.The Arc Flash Boundary c.Potential electrical arc flash hazards d.All of the above
The correct answer is: All of the above
An electrical safety program should include a section on ___. Select one: a.Procedures b.Responsibility c.Principles d.All of the above
The correct answer is: All of the above
___ signs, such as those used to advise that hard hats are to be worn, shall be used only to warn against potential hazards or to caution against unsafe practices. Select one: a.Directional b.Exit c.Traffic d.Warning e.Caution f.Danger
The correct answer is: Caution
As used in reference to construction drawing, CAD is an abbreviation for ___. Select one: a.Cylindrical Area Dimensions b.Computer Aided Drafting c.Centered Air Diffuser d.Copper or Aluminum Device
The correct answer is: Computer Aided Drafting
How does grounding prevent an electrical fault? Select one: a.Grounding protects the "line side" of the circuit. b.Grounding protects the "load side" of the circuit. c.Grounding reduces potential difference. d.Grounding cannot prevent an electrical fault.
The correct answer is: Grounding cannot prevent an electrical fault.
During periods of ground fault, loose couplings and connectors used in metal conduit systems can cause a fire hazard. Select one: a.True b.False
The correct answer is: True
The NEC® permits the grounded conductor for a 277-volt circuit to have an insulation color that is ___. Select one: a.gray b.white c.green d.either a or b e.a or b or c
2020 NEC: 200.6(A) | 2020 NEC: 200.6(B) The correct answer is: either a or b
The conductors at Point A in Figure 307.53 are on the ___ side of the service equipment. Select one: a.load b.line
The correct answer is: line
Comparing the job progress to the work schedule should be done ___. Select one: a.on a daily basis b.at the completion of each phase c.when progress payments are to be authorized d.at the end of each week
The correct answer is: on a daily basis
The conductors shown above at Point H in Figure 205.3 are ___ conductors. Select one: a.branch-circuit b.service-entrance c.feeder d.service-drop
The correct answer is: service-entrance
In addition to maintaining the continuity of the grounding path, whether or not a device is installed in the metal box, connecting the equipment grounding conductors to an integral screw attached to the box also fulfills the secondary purpose of grounding the metal box. Select one: a.True b.False
2020 NEC: 250.148(C) The correct answer is: True
There are ___ FSDs in the ductwork penetrating the walls in the Computer Lab (Room B141) at BCES. Select one: a.4 b.1 c.2 d.3 e.0
There are 3 duct penetrations in the walls surrounding Room B141 and each has a fire smoke damper shown in the wall above the ceiling.1. The 26/24 duct penetrates the north wall. Re: Drawing M2.22. The 72/24 duct penetrates the south wall. Re: Drawing M4.1/Detail 2.3. The 24/24 duct penetrates the east wall. Re: Drawing M4.1/Detail 2. The correct answer is: 3
When an isolated ground receptacle is installed in a metal box, a(n) ___ equipment grounding conductor is required for connection to the metal box. Select one: a.separate b.bare copper c.oversized d.insulated
2020 NEC: 250.96(B) The correct answer is: separate
When conductor temperature increases, the resistance of the conductor increases. This causes the ampacity of the conductor to decrease. Select one: a.True b.False
2020 NEC: 310.15(B)(1) | 2020 NEC: 310.15(B)(2) The correct answer is: True
A set of three-phase feeder conductors are run in PVC from a 225-amp breaker and will feed a subpanel. The original plans called for 4/0 feeder conductors. However, the subpanel was relocated so that the feeder conductors were increased in size to 350 kcmil. With this change, the minimum size EGC permitted is ___ AWG. Select one: a.1/0 b.1 c.2 d.3 e.4
225 A 4 AWG versus4/0 increased in size to 350: 350000 ÷ 211600 = 165.41% increase orig. 4 AWG EGC increased 165.41%or 41740(1.6541) = 69041 cmils 1 AWG2020 NEC: 250.122(A) | 2020 NEC: 250.122(B) | 2020 NEC: 250.122 (Table) The correct answer is: 1
Scenario 305.24A 225 KVA, 480 delta to 208/120-volt, 3-ph, 4-w transformer is to be installed. Secondary conductors are installed from the transformer to a 600-A MB panelboard. There will be four parallel flexible metal conduits to this 600-A panel. Each conduit will contain 4 each 1/0 conductors. You have decided to "ground and bond" everything in the panelboard.Refer to Scenario 305.24 to answer this question. The smallest bonding jumper you can run in each of the sections of flex is ___ AWG. Select one: a.3 b.1 c.6 d.4 e.1/0
1/0 6 AWG per T.250.102(C)(1)2020 NEC: 250.30(A)(2) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 6
The one-line diagram on a set of plans calls for 10 AWG wire to be run from a 3-pole, 15-amp circuit breaker to a motor. The plans do not specify the grounding conductor size, but you do know that the specifications require that you pull one with each circuit. The plans only state to "Ground per the NEC®." The smallest size wire you should install with the circuit conductors is ___ AWG. Select one: a.8 b.14 c.6 d.10 e.12
15 A 14 AWG vs. 10 AWG per 250.122(B) [for any reason]2020 NEC: 250.122(B) The correct answer is: 10
Refer to Figure 308.22. Only one EGC will be installed in the EMT between the panel and the metal pull box. Splices will be made at the ground bar in the pull box to drop an EGC to each load. Does the NEC® require the insulated ground bar to be connected to the metal pull box? Select one: a.Yes b.No
2020 NEC: 250.148(C) The correct answer is: Yes
Refer to Figure 305.01. Where the GEC is run into the transformer, the smallest system bonding jumper you can use to connect XO to the grounding conductors is ___ AWG. Select one: a.3/0 b.1/0 c.2 d.2/0 e.6
2020 NEC: 250.28(D) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 2/0
To be classified as a separately derived system, the neutral from an emergency generator is required to be connected to the neutral of the normal supply system. Select one: a.True b.False
2020 NEC: 250.30 I-Note The correct answer is: False
Loose connections in a circuit conductor cause arcing and in turn oxidation occurs at the connection. The circuit is connected to a single load. The voltage at the load will be ___ with the poor connection in the circuit. Select one: a.the same b.less c.more
Some voltage will be dropped across the resistance in the joint. The correct answer is: less
If ___ of current flows through the human body, it can be fatal. Select one: a.0.75 mA b.2.5 mA c.5 mA d.200 mA
The correct answer is: 200 mA
Revisions to construction drawings are indicated by ___. Select one: a.a numbered, triangular symbol near the revised area or item b."clouding" around the revised area or item c.both a and b d.neither a nor b
both a and b
During demolition operations at multistory buildings, the stairwells shall be illuminated for safe passage. Select one: a.True b.False
The correct answer is: True
Metal pan and skeleton-type stairs must be filled with concrete or other solid material up to the top of each pan before any employees are permitted to use them. Select one: a.True b.False
The correct answer is: True
Near-miss incidents need to be investigated. Select one: a.True b.False
The correct answer is: True
No employee shall be allowed to consume food or beverages in a toilet room or in any area exposed to a toxic material. Select one: a.True b.False
The correct answer is: True
Portable containers used to dispense drinking water shall be capable of being tightly closed, and equipped with a tap. Select one: a.True b.False
The correct answer is: True
Resistance to earth is also commonly known as resistivity. Select one: a.True b.False
The correct answer is: True
Static electricity is a hazard common to a wide variety of industries. Select one: a.True b.False
The correct answer is: True
Taking the time to bond or ground when working around flammable vapors, gases, and dusts will help prevent a serious accident. Select one: a.True b.False
The correct answer is: True
The bonding jumper installed between a piece of electrical utilization equipment and a grounded metal element, such as a water pipe, minimizes shock hazard because it eliminates the potential difference between the electrical equipment and the grounded metal element (or water pipe). Select one: a.True b.False
The correct answer is: True
The human body is a good conductor because it is mostly salt water. Select one: a.True b.False
The correct answer is: True
The mechanical equipment schedules shown on BCES Drawing M9.1 indicate how the exhaust fans are to be turned ON and OFF. Select one: a.True b.False
The correct answer is: True
Walkways formed from heavy planking shall be provided and used by employees while performing manual demolition. Select one: a.True b.False
The correct answer is: True
When current passes through a conductor, a magnetic field is created around the conductor. When individual circuit conductors are either in close proximity (in wireways, trenches, cable trays, etc) or contained in the same cable or conduit, these magnetic fields cancel each other because the currents in each conductor are not in phase with each other. Select one: a.True b.False
The correct answer is: True
Where construction work is in progress, OSHA requires areas, aisles, stairs, ramps, runways, corridors, offices, shops, and storage areas to be lighted. Select one: a.True b.False
The correct answer is: True
A(n) ___ is a tradesman who is in charge of a construction crew. Select one: a.GC b.architect c.foreman d.subcontractor
The correct answer is: foreman
Enforcement of safety on the jobsite is the responsibility of the ___. Select one: a.owner b.architect c.foreman d.none of these
The correct answer is: foreman
At BCES, EF-28 serves the ___ in Room D112. Select one: a.fume hood b.toilet c.lab table
The correct answer is: fume hood
When a piece of equipment is connected to the earth, it meets the definition for ___. Select one: a.insulated b.guarded c.isolated d.grounded
The correct answer is: grounded
The conductor shown at Point B in Figure 306.52 is a(n) ___. Select one: a.grounding electrode conductor b.main bonding jumper c.equipment grounding conductor d.grounded conductor e.none of these
The correct answer is: grounded conductor
When light strings are utilized on a construction site, empty sockets or sockets with shattered lamps should be replaced ___ after being reported. Select one: a.before the next work shift b.immediately c.within 72 hours d.within 24 hours
The correct answer is: immediately
Total opposition to current flow in an alternating current (ac) circuit is ___. Select one: a.impedance b.reactance c.resistance d.none of these
The correct answer is: impedance
Total opposition to the flow of electric current is called resistance in a direct current (dc) circuit and ___ in an alternating current (ac) circuit. Select one: a.resistance b.impedance c.reactance d.none of these
The correct answer is: impedance
The switch for the exhaust fan serving the fume hood in BCES Room D112 is to be installed ___. Select one: a.in the wall adjacent to the fume hood b.in the fume hood front panel
The correct answer is: in the fume hood front panel
Loose connections in a circuit conductor cause arcing and in turn oxidation occurs at the connection. This oxidation causes the total circuit resistance to ___. Select one: a.remain the same b.decrease c.increase
The correct answer is: increase
When a circuit is installed in a metal conduit, installation of an ___ equipment grounding conductor reduces the ground-fault current path impedance and makes it more effective. Select one: a.external b.internal
The correct answer is: internal
Each page in the daily job journal should be signed by the ___. Select one: a.job foreman b.project manager c.general contractor d.all of these
The correct answer is: job foreman
The conductors at Point B in Figure 307.53 are on the ___ side of the service equipment. Select one: a.line b.load
The correct answer is: load
Inductive reactance is related to ___. Select one: a.radio-frequency interference (RFI) b.capacitance c.magnetic fields d.ground currents
The correct answer is: magnetic fields
The ___ connects the equipment grounding conductors to the grounded (neutral) conductors. Select one: a.grounding electrode conductor b.main bonding jumper c.both a & b d.neither a nor b
The correct answer is: main bonding jumper
A(n) ___ conductor carries circuit current in normal operation. Select one: a.equipment grounding b.neutral c.grounding electrode d.none of these
The correct answer is: neutral
All of the following are considered a short circuit, except for ___. Select one: a.phase-to-neutral fault b.phase-to-phase fault c.neutral-to-ground fault d.line-to-line fault
The correct answer is: neutral-to-ground fault
While you are walking the job site, the GC asks you to redirect some of your crew to work on a task that is not in your scope of work, plan, or schedule. You should ___. Select one: a.get the crew started after they complete what they are doing b.not start the work until there is an approved, signed change order c.immediately redirect the work d.forcefully tell the GC that you can't do it
The correct answer is: not start the work until there is an approved, signed change order
A static spark occurs when ___. Select one: a.one surface is charged positively and one surface is charged negatively b.both surfaces are charged negatively c.both surfaces are charged positively d.all of these e.none of these
The correct answer is: one surface is charged positively and one surface is charged negatively
A 120/208-volt, 3-ph, 4-wire feeder is installed underground to serve 120-volt convenience receptacles, 120-volt lighting, and a 208-volt 1Ø window unit AC/HTR in the parking attendant's "shack" at Park-and-Fly. The feeder is run from a 3-pole breaker in a panelboard that is located inside the vehicle maintenance building. One circuit will be required for the receptacles, one circuit for the lighting, and one circuit for the window unit. The feeder at the shack is permitted to be connected to ___. All spaces in the panel will be occupied by breakers.I. a 12-circuit MB panel II. a 6-circuit MLO panel III. a 24-circuit MLO panel Select one: a.I or II or III b.II or III only c.I or III only d.I only e.II only f.I or II only
It is assumed that someone trying to disconnect all power to the shack would not take the time to read a panel directory to determine if any of the breakers are spares and would not be included in the "6 operations."2020 NEC: 225.33(A) The correct answer is: I or II only
Interlocking tape - Type MC cable containing an insulated EGC ___ permitted to be used within patient care areas. Select one: a.is b.is not
MC cable's sheath is not an EGC unless combined with the insulated EGC.2020 NEC: 517.13(A) The correct answer is: is not
Contactor C1 controls the circuit to the BCES marquee sign. Select one: a.True b.False
Note 8 Ckt LE-6 and C1 does not control any 120-volt circuits. The correct answer is: False
Entries in the daily job journal should be made ___. Select one: a.at the beginning of the week b.the next day c.throughout the day d.at the end of the week
The correct answer is: throughout the day
A static spark can occur when an electrical charge accumulates on the surfaces of ___ materials that have been brought together and then separated. Select one: a.five b.two c.three d.four
The correct answer is: two
Potential difference refers to which of the following? Select one: a.voltage b.resistance c.shock hazard of ac circuits as compared to dc circuits d.shock hazard associated with different grounding methods
The correct answer is: voltage
Type MC cable is available with two grounding conductors. One of these is green and the second one is green with ___ stripes. Select one: a.white b.red c.yellow d.none of these
The correct answer is: yellow
In terms of grounding, the earth is considered to represent ___. Select one: a.zero potential b.infinite impedance c.a natural battery d.negative polarity
The correct answer is: zero potential
For Figure 309.73, a meter would indicate ___ ohms between points A and C. Select one: a.∞ (or OL on a digital meter) b.0
The correct answer is: ∞ (or OL on a digital meter)
A 600-amp main breaker service panel will have a 225-A breaker installed in it to feed a 225-amp, 1Ø, 3-wire main breaker panel. You will install three 4/0 conductors to the new panel. You will install a ___ AWG MBJ in this new 225-amp panel. Select one: a.2 b.4 c.3 d.none of these
To install an MBJ in this subpanel would be a Code violation.2020 NEC: 250.30(A) The correct answer is: none of these
___ signs have yellow as the predominate color. Select one: a. Caution b. Danger c. Warning
Your answer is correct. The correct answer is: Caution
___ signs shall be used only to warn against potential hazards or caution against unsafe practices. Select one: a. Caution b. Danger c. Warning
Your answer is correct. The correct answer is: Caution
___ signs have red as the predominate color in the upper panel. Select one: a. Caution b. Danger c. Warning
Your answer is correct. The correct answer is: Danger
___ signs shall be used where an immediate hazard exists. Select one: a. Caution b. Danger c. Warning
Your answer is correct. The correct answer is: Danger
___ signs shall be used to bring attention to a potentially hazardous condition which, if not avoided, will result in death or serious injury. Select one: a. Caution b. Danger c. Warning
Your answer is correct. The correct answer is: Warning
___ signs signs have bright orange as the predominate color. Select one: a. Caution b. Danger c. Warning
Your answer is correct. The correct answer is: Warning
Bonding is the process of connecting one or more conductive objects to the earth. Select one: a.True b.False
The correct answer is: False
All of the following enclosure materials are suitable for use as an equipment grounding conductor, except for ___. Select one: a.aluminum b.steel c.polyvinyl chloride d.bronze
2020 NEC: 250.118 The correct answer is: polyvinyl chloride
When the EMT is used as the EGC for a circuit, its length has no effect on the opening time of the circuit breaker protecting the circuit. Select one: a.True b.False
The correct answer is: False
Impedance (Z) ___.I. is the total opposition to current flow in a circuitII. includes resistance Select one: a.I only b.II only c.both I & II d.neither I nor II
The correct answer is: both I & II
The MAIN in the switchgear shown in Figure 307.32 is rated at 1600 amps and each conduit contains 600 kcmil conductors. The minimum size of each of the BJs shown in Section 1 is ___ AWG or kcmil. Select one: a.600 b.1/0 c.3/0 d.300 e.250
600 kcmil 1/0 AWG2020 NEC: 250.102(C) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 1/0
Although protected with a GFCI breaker, a person could still feel a shock. Select one: a.True b.False
The correct answer is: True
The landscape drawings included in the BCES set of prints ___ affect electrical installations. Select one: a.do b.do not
The correct answer is: do
According to the NEC®, there are ___ types of hazardous classifications. Select one: a.four b.two c.three d.one
The correct answer is: three
Within patient care areas, ___ is permitted to be used as the wiring method to connect a receptacle to the branch circuit. Select one: a.a 12-foot length of Type AC cable containing an insulated EGC b.an 8-foot length of FMC containing a 12 AWG EGC and protected with a 20-A OCPD c.a 5-foot length of interlocking tape, Type MC cable containing an insulated EGC d.none of these
The FMC exceeds the 6-ft limit and the MC cable's sheath is not an EGC unless combined with the insulated EGC. 2020 NEC: 517.13(A) | 2020 NEC: 517.13(B) The correct answer is: a 12-foot length of Type AC cable containing an insulated EGC
If the resistance of the body is 100 ohms, how much current would pass through the body when connected to a 120-volt circuit? Select one: a.10 mA b.12 A c.1.2 amps d.10 amps
The correct answer is: 1.2 amps
Riser height and tread depth of OSHA required stairways shall be uniform to within ___ inch(es). Select one: a.1/4 b.6 c.3 d.2
The correct answer is: 1/4
During the period of construction, ___ foot candles are required in electrical equipment rooms. Select one: a.3 b.30 c.5 d.10 e.12
The correct answer is: 10
Two 20-amp, 120-volt GFCI breakers are installed in spaces 8 & 10 in a 120/240-volt 1Ø, 3-wire panel. These two circuits will be installed in one conduit. You must install at least ___ neutral(s) in the conduit. Select one: a.1 b.2 c.3 d.0
The correct answer is: 2
For stairways used during the period of construction and are not a permanent part of the structure, landings shall be at least ___ inches wide for every 12 feet of vertical travel. Select one: a.24 b.30 c.39 d.18 e.22 f.36
The correct answer is: 22
If a ladder is used to reach an upper level, the ladder must extend at least ___ feet above the upper level and be tied off to keep it in position. Select one: a.6 b.5 c.2 d.3 e.4
The correct answer is: 3
For a stairrail system, the handrail needs to be installed ___ from the wall to allow room for a hand hold. Select one: a.4 inches b.3 inches c.12 inches d.3 feet
The correct answer is: 3 inches
In a 480-volt, corner-grounded delta system, the maximum voltage to ground is ___. Select one: a.480 volts b.277 volts c.208 volts d.240 volts e.none of these
The correct answer is: 480 volts
During demolition operations, debris dropped through holes in floors requires these openings to be barricaded at 42 inches above the working level and at least ___ back from the edge of the holes. Select one: a.4 feet b.3 feet c.42 inches d.6 feet e.18 inches
The correct answer is: 6 feet
If demolition material is dumped into a chute from mechanical equipment or wheelbarrows, a securely attached toeboard or bumper, not less than 4 inches thick and ___ high, shall be provided at each chute opening. Select one: a.3 feet b.6 inches c.1 foot d.18 inches
The correct answer is: 6 inches
A 112.5 KVA 480 delta to 208/120-volt, 3-ph, 4-W transformer is to be installed.• One set of secondary conductors is installed from the transformer to a 150-A MB panelboard. A short section of FMC will connect the transformer to this 150-A panel. The flex will contain 4 each 1/0 conductors.• A second set of secondary conductors is installed from the transformer to a 225-A MB panelboard. One conduit will be installed between this 225-amp panel and the transformer. The conduit will contain 4 each 4/0 conductors.• You have decided to "ground and bond" everything in the transformer enclosure.The smallest bonding jumper you can run in the flex between the transformer and the 150-A PB is ___ AWG. Select one: a.3 b.2 c.4 d.6 e.1
1/0 6 AWG per T.250.102(C)(1)2020 NEC: 250.30(A)(2) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 6
A 1200-A fused safety switch is supplied from a 120/208-volt, 3Ø, 4-wire service lateral using 3 paralleled Schedule 40 PVC conduits. The load calculation results are as follows: AØ = 1160 amps; BØ = 1180 amps; CØ = 1140 amps; Neutral = 900 ampsRefer to Scenario 304.12, shown above, to answer this question. The smallest main bonding jumper you are permitted to install in the switch is ___ AWG or kcmil. Select one: a.350 b.4/0 c.250 d.3/0 e.1/0
1200 ÷ 3 = 400 amps 600 kcmil ungrounded conductor size3 x 600 kcmil = 1800 kcmil then: 1800 kcmil x 12 1/2% = 225 kcmil 250 kcmil2020 NEC: 250.28(D) | 2020 NEC: 250.102(C)(1) (Table) Note 1 | 2020 NEC: 310.16 The correct answer is: 250
As shown in Figure 205.6, MDP is a 1200-Amp, 3Ø, 4-wire service and will have four parallel sets of conductors feeding it. Each set is in a separate conduit. What is the minimum size of the ungrounded conductors in each conduit? Select one: a.4/0 b.250 c.3/0 d.2 e.350
1200/4 = 300 amps 350 kcmil The correct answer is: 350
A 120/240-volt, 1-ph, 3-wire service is to be run to serve 400-A, main breaker Panel B. As shown, two parallel conduits will be installed for the service. Panel B supplies 200 amps of 240-volt loads. Additionally, 122 amps of 120-volt loads are connected to AØ, and 188 amps of 120-volt loads are connected to BØ in Panel B. The BØ conductor in each of the parallel conduits will carry ___ amps. Select one: a.144 b.188 c.388 d.94 e.194
188 + 200) ÷ 2 = 194 amps The correct answer is: 194
Scenario 307.1A 600-amp, 120/240-volt, 3Ø, 4-wire service is to be installed in two conduits. The service-entrance conductors installed are 350 kcmil. The two threaded RMC conduits enter the bottom of the CT can where a hole saw was used to cut the holes. The hole saw "walked" a bit and wallowed out the holes so that now you will have to install bonding bushings on the conduits.Refer to Scenario 307.1. The smallest bonding jumper you can install from the ground bar to the bushings is ___ AWG. Only one BJ will be run to hit both bushings. Select one: a.2/0 b.1/0 c.3/0 d.2 e.1
2 x 350 = 700 kcmil 2/0 AWG2020 NEC: 250.102(C) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 2/0
An employer who exercises "due diligence" is an employer who is proactive with regard to safety. Select one: a.True b.False
The correct answer is: True
Circuits LA-1, -4, and -11 are rated at 20 amps and have a neutral. These have been run as 4-wire, 12 AWG MC cable from a 120/208-volt, 3Ø, 4W panelboard to a junction box. Fluorescent luminaires have been installed in several offices in a business and connected to these circuits. The offices will be used continuously during the business day. Each luminaire draws 1.2 amps. If no more than ___ luminaires are connected to Ckt. LA-4, the circuit breaker will operate within its ratings. Select one: a.13 b.15 c.17 d.16 e.14
20-A breaker can be loaded to 80% of its rating where carrying continuous loads.1.2 A x 13 fixtures = 15.6 amps where the breaker can carry 16 amps The correct answer is: 13
You will install the 800-amp, 120/208-volt, 3-ph, 4-W "gutter service" shown above. The conductors installed from the utility transformer to the gutter are 750 kcmil. Panel D is a 200-amp MLO panelboard and is fed from safety switch C (fused at 200 A). There is a nipple between Panel D and Switch C.Refer to Figure 307.51. At the points where the nipple enters both the Switch C and Panel D, bonding bushings will have to be installed because of poorly cut holes. The smallest bonding jumper you can install from the bonding bushing in the switch to the ground bar in the switch is a ___ AWG. Select one: a.6 b.3 c.8 d.4 e.2
200 A MLO 200 A fuses 6 AWG Cu2020 NEC: 250.102(D) | 2020 NEC: 250.122 (Table) The correct answer is: 6
The maximum number of 3-pole circuit breakers used as service disconnects permitted in a 3Ø panelboard is ____. Select one: a.42 b.14 c.3 d.1 e.6
2020 NEC 230.71(B)(2) The correct answer is: 1
The Article 100 definition of bonding emphasizes ___. Select one: a.avoidance of dissimilar metals to prevent electrolytic action b.electrical continuity c.permanent connection
2020 NEC: 100_Bonded The correct answer is: electrical continuity
The conductor shown at Point C in Figure 306.52 is a(n) ___. Select one: a.equipment grounding conductor b.grounding electrode conductor c.grounded conductor d.main bonding jumper e.none of these
2020 NEC: 100_Bonding Jumper, Main The correct answer is: main bonding jumper
When a short circuit occurs in a circuit where the conduit couplings and connectors are loose, the opening time of an OCPD ___ affected. Select one: a.is b.is not
2020 NEC: 100_Effective Ground-Fault Current Path The correct answer is: is not
A circuit is installed in EMT and compression fittings are used. A separate EGC is NOT installed in the conduit. If a ground fault occurs and one or more couplings were never tightened properly, compared to normal operation, the fault current will be ___ and the OCPD will take ___ time to open. Select one: a.lower less b.higher less c.lower more d.lower the same e.higher more
2020 NEC: 100_Effective Ground-Fault Current Path The correct answer is: lower more
An overcurrent can be excessive current caused by a fault (short circuit or ground fault). Select one: a.True b.False
2020 NEC: 100_Overcurrent The correct answer is: True
An overload can be excessive current caused by a fault (short circuit or ground fault). Select one: a.True b.False
2020 NEC: 100_Overload The correct answer is: False
Which of the following conditions would be classified as an overload?I. 43-A noncontinuous load connected to a 40-A fuseII. an ungrounded conductor touching another ungrounded conductorIII. an ungrounded conductor touching a grounded metal enclosure Select one: a.I, II & III b.I only c.II & III only d.II only e.I & III only
2020 NEC: 100_Overload The correct answer is: I only
The most common configuration for a grounded, three-phase, ac distribution system is four-wire, center grounded (also called "wye connected"). The code requirements for identification of a grounded conductor are provided in section ___. Select one: a.250.119 b.200.6(A)
2020 NEC: 200.6(A) The correct answer is: 200.6(A)
Normally, a grounded circuit conductor shall be identified as white or gray. Select one: a.True b.False
2020 NEC: 200.6(A) The correct answer is: True
Which of the following receptacles are required to be GFCI protected?I. where installed outside on the exterior wall of a restaurantII. where installed on the wall at 18" AFF (NOT above a countertop) in the kitchen at a restaurantIII. where installed on the exterior wall (outdoors) of an elementary school Select one: a.II only b.I, II & III c.I only d.II & III only e.III only
2020 NEC: 210.8(B) The correct answer is: I, II & III
Which of the following receptacles are required to be GFCI protected? I. where installed in a patient's room in a hospital II. where installed on the exterior wall (outdoors) of an elementary schoolIII. where installed adjacent to (2 feet away from) a sink in a bar
2020 NEC: 210.8(B)(4) | 2020 NEC: 210.8(B)(5) The correct answer is: II & III only
NEC® Section 240.22 states that generally, overcurrent devices shall only be installed in ___ conductors. Select one: a.grounding b.grounded c.ungrounded
2020 NEC: 240.22 The correct answer is: ungrounded
The scope of Article 250 covers all of the following topics, except for ____. Select one: a.circuit conductors to be grounded b.grounding requirements for surge protection c.methods of bonding d.general requirements for grounding and bonding of electrical installations
2020 NEC: 250.1 The correct answer is: grounding requirements for surge protection
In non-corrosive environments, Section 250.102(A) permits equipment bonding jumpers to be made of ___.I. aluminum II. copper Select one: a.I only b.II only c.either I or II
2020 NEC: 250.102(A) The correct answer is: either I or II
Refer to Figure 307.32. If you are to size the bonding jumpers from the conduits in Section 1 to the equipment grounding busbar, you would use NEC® Section ___ to determine the minimum size of the BJs. Select one: a.250.102(D) b.250.102(C)
2020 NEC: 250.102(C) The correct answer is: 250.102(C)
Which of the following tables is used to select a supply-side equipment bonding jumper? Select one: a.Table 250.66 b.Table 310.16 c.Table 250.102(C)(1) d.Table 250.122
2020 NEC: 250.102(C) The correct answer is: Table 250.102(C)(1)
In general, bonding requirements for the supply (line) side of the service equipment are ___ bonding requirements on the load side. Select one: a.less stringent than b.identical to c.more stringent than d.none of these
2020 NEC: 250.102(C) The correct answer is: more stringent than
The size of bonding jumpers on the line or supply side of service equipment is based on the size of the ___. Select one: a.supply conductor b.rating of the overcurrent device
2020 NEC: 250.102(C)(1) The correct answer is: supply conductor
Bonding jumpers on the supply side of the service are sized according to NEC® Table ___. Select one: a.300.19(A) b.250.122 c.300.50 d.250.102(C)(1)
2020 NEC: 250.102(C)(1) | 2020 NEC: 250.66 (Table) The correct answer is: 250.102(C)(1)
When flexible metal conduit is used to protect service-entrance conductors, an equipment bonding jumper not longer than ___ is required when installed outside the flex. Select one: a.8 feet b.4 feet c.6 feet d.any length
2020 NEC: 250.102(E)(2) The correct answer is: 6 feet
A separate water piping bonding jumper ___ required where the metal frame of a building or structure is used as the grounding electrode for a separately derived system and is bonded to the metal water piping in the area served by the separately derived system. Select one: a.shall not be b.shall be
2020 NEC: 250.104(D)(1) Exc 2 The correct answer is: shall not be
In general, grounding electrodes for lightning protection ___ be connected to grounding electrodes for the electric power and communications systems. Select one: a.should b.should not
2020 NEC: 250.106 The correct answer is: should
Grounding requirements for equipment operating at "over 150 volts to ground" apply to which of the following voltage systems?I. 120/240, 1Ø, 3-wire II. 120/208, 3Ø, 4-wire III. 120/240, 3Ø, 4-wire Select one: a.I, II & III b.I & II only c.II & III only d.II only e.I & III only f.III only
2020 NEC: 250.110(6) The correct answer is: III only
You have installed 465 feet of PVC underground from a breaker panel to a sign. The sign circuit is protected with a 15-amp breaker. Instead of installing a grounding conductor with the circuit conductors, could you drive a ground rod at the base of the metal sign and bond the sign to it? Select one: a.Yes b.No
2020 NEC: 250.112(G) | 2020 NEC: 250.54 The correct answer is: No
A ___ is permitted to serve as an equipment grounding conductor.I. bare conductor included as part of a listed cable assemblyII. metallic cable sheath or armor III. metallic water piping system Select one: a.I & III only b.II & III only c.II only d.I & II only e.I only f.none of these
2020 NEC: 250.118 The correct answer is: I & II only
NEC® Section 250.118 permits ___ to be used as an equipment grounding conductor. Select one: a.the armor of type MC cable b.the armor of Type AC cable c.the steel sheath of Type MI d.all of these
2020 NEC: 250.118 | 2020 NEC: 332.108 The correct answer is: the armor of Type AC cable
NEC® Section 250.118(1) permits the equipment grounding conductor to be ___. Select one: a.stranded b.solid c.insulated d.all of these
2020 NEC: 250.118(1) The correct answer is: all of these
You are to run a circuit underground in PVC conduit from a service panelboard to an isolated ground receptacle. The isolated ground receptacle is mounted in a metal box. Along with the circuit conductors, you will pull in ___. Select one: a.one grounding conductor and connect it to the metal box b.one grounding conductor and connect it to the green screw on the receptacle c.both a and b d.neither a nor b
2020 NEC: 250.118(1) | 2020 NEC: 250.96(B) I-Note The correct answer is: both a and b
When flexible metal conduit is installed to provide flexibility, such as a connection to motorized equipment or a movable light fixture, does the NEC® require that an equipment bonding jumper be installed with the conduit to maintain grounding continuity? Select one: a.Yes b.No
2020 NEC: 250.118(5) The correct answer is: Yes
Refer to Figure 308.7. The FMC was installed to provide flexibility to this motor. Does the NEC® require that an equipment grounding conductor be installed with the conduit to maintain grounding continuity? Select one: a.Yes b.No
2020 NEC: 250.118(6)(d) The correct answer is: Yes
The equipment grounding conductor is normally ___ in color. Select one: a.light gray b.green c.white d.black
2020 NEC: 250.119 The correct answer is: green
NEC® Section 250.119(A)(2) permits an insulated conductor, larger than 6 AWG, of a basic color other than green to be used as an equipment grounding conductor when which of the following conditions is satisfied? Select one: a.The identification encircles the conductor. b.The likelihood of a fault is low. c.The installation is a separately derived system. d.Ground monitors are provided.
2020 NEC: 250.119(A) The correct answer is: The identification encircles the conductor.
The following circuits are installed in a single PVC conduit:12 AWG conductors fed from a 3-pole, 20-A circuit breaker8 AWG conductors fed from a 3-pole, 50-A circuit breaker6 AWG conductors fed from a 3-pole, 60-A circuit breakerThe smallest EGC permitted to be installed in the PVC is ___ AWG. Select one: a.10 b.8 c.4 d.12 e.6
2020 NEC: 250.122 The correct answer is: 10
The NEC® requires a ___, copper-clad aluminum equipment grounding conductors for a circuit protected by a 200-ampere overcurrent protective device. Select one: a.1/0 AWG b.8 AWG c.4 AWG d.none of these
2020 NEC: 250.122 The correct answer is: 4 AWG
The equipment grounding conductor is sized according to the type of material (copper, aluminum, copper-clad aluminum) used for the phase conductors and the cross-sectional area of the phase conductors. Select one: a.True b.False
2020 NEC: 250.122 The correct answer is: False
Which of these conditions is addressed in 250.122?I. When the circuit conductors adjusted to a size larger than required for the load or the OCPD, the equipment grounding conductor must be correspondingly adjusted in size.II. The equipment grounding conductor is never required to be larger than the circuit conductors.III. Where more than one circuit is installed in a raceway or cable, only a single equipment grounding conductor is required. Select one: a.II & III only b.III only c.II only d.I, II & III e.I only
2020 NEC: 250.122 The correct answer is: I, II & III
The equipment grounding conductor is sized according to which of the following?I. cross-sectional area of the phase conductorsII. material (copper, aluminum, copper-clad aluminum) of the phase conductors III. rating of the circuit overcurrent protective deviceIV. whether a magnetic or non-magnetic raceway is used Select one: a.I & II only b.I only c.I & IV only d.II & IV only e.III only
2020 NEC: 250.122 The correct answer is: III only
You are going to pull branch-circuit wiring through EMT from a 120/208-volt, 3-ph, 4-wire panel out to a 12" × 12" J-box. There will be five 20-amp multiwire branch circuits. Because you will be installing 20 wires in the EMT, you will install 8 AWG wire instead of 12. The larger wire is due to the ampacity correction required for the number of conductors in the conduit. The smallest EGC you are permitted to install with the circuit conductors is ___ AWG. Select one: a.6 b.14 c.8 d.10 e.12
2020 NEC: 250.122(B) The correct answer is: 12
Scenario 304.36A 600-amp, 277/480-volt, 3-ph, 4-wire feeder is installed underground in PVC from one building to deliver power to a 600-A safety switch (fused at 600 A) that is installed on another building. The parallel feeder consists of two separate conduits with four each 350 kcmil conductors in each conduit.Refer to Scenario 304.36 to answer this question. The smallest EGC conductor that can be installed in each conduit is a ___ AWG. Select one: a.1 b.4 c.1/0 d.2 e.3
2020 NEC: 250.122(F) The correct answer is: 1
The phase conductors of a 400-ampere circuit are divided into two parallel raceways. The NEC® requires which of the following copper EGCs? Select one: a.two 3 AWG, one in each raceway b.two 1 AWG, one in each raceway c.a single 1 AWG, in either raceway d.a single 3 AWG, in either raceway
2020 NEC: 250.122(F) The correct answer is: two 3 AWG, one in each raceway
When visible, the grounding terminal on a wiring device such as a receptacle is ___. Select one: a.required to have a ground symbol on the top of the screw b.required to be suitable for use with a straight blade and Phillips screwdriver c.required to be green in color and must have a hexagonal head or nut d.only required to be green in color e.required to be green in color and must have a round head
2020 NEC: 250.126 The correct answer is: required to be green in color and must have a hexagonal head or nut
A symbol for ground that is used on electrical construction drawings is correctly shown here. Select one: a.True b.False
2020 NEC: 250.126 I-Note The correct answer is: True
The equipment grounding conductor is permitted to be run separately from the circuit conductors when ___. Select one: a.installed in industrial establishments only b.the equipment grounding conductor has the same insulation as the circuit conductors c.a nongrounded-type receptacle is replaced d.the branch circuit is less than 30 amperes
2020 NEC: 250.130(C) The correct answer is: a nongrounded-type receptacle is replaced
A new home has been built and you are to connect a new 120/240-volt clothes dryer to the receptacle. The dryer was shipped with a jumper between the neutral terminal and the ground terminal. You will purchase and connect the attachment cord and plug "kit" to the terminals in the dryer. Which of these installations is correct? Assume that the home was built "to Code". Select one: a.Install a 4-W cord-and-plug assembly, and leave the Neutral-Ground jumper. b.Install a 3-W cord-and-plug assembly, and leave the Neutral-Ground jumper. c.Install a 4-W cord-and-plug assembly, and remove the Neutral-Ground jumper. d.Install a 3-W cord-and-plug assembly, and remove the Neutral-Ground jumper.
2020 NEC: 250.140 The correct answer is: Install a 4-W cord-and-plug assembly, and remove the Neutral-Ground jumper.
To apply the exception to NEC® 250.140, the existing wiring method to a 120/240-volt range can be ___.I. 8-2 with ground Type NM cableII. 8-3 (without ground) Type NM cableIII. 8-3 Type SE cable (all three conductors insulated) Select one: a.III only b.II or III only c.I or II only d.I, II or III
2020 NEC: 250.140 Exc The correct answer is: II or III only
For existing installations and under certain circumstances, the grounded circuit conductor ___ used for grounding equipment on the line (supply) side or within the enclosure of the main disconnecting means for separate buildings. Select one: a.shall be permitted to be b.shall be c.shall not be d.shall not be permitted to be
2020 NEC: 250.142(A)(2) The correct answer is: shall be permitted to be
Which of these box-receptacle combinations require(s) the installation of a grounding jumper (pigtail) from the receptacle to the box? All boxes and conduits are metal. Separate EGCs were NOT installed with these circuits.I. a receptacle installed on a surface-mounted "bell" box where both washers were removed from the receptacle mounting screwsII. a self-grounding receptacle mounted on a switch box that is set back in the sheetrock wall not more than 1/ 4 inch where the washer was removed from the receptacle mounting screwsIII. a receptacle on a surface-mounted handy box where both washers were removed from the receptacle mounting screws Select one: a.I only b.I, II & III c.I & III only d.II only e.none of these
2020 NEC: 250.146 The correct answer is: none of these
Section ___ of the NEC® permits the equipment grounding conductor used as an isolated grounding conductor to pass through a metal box without being connected to the box. Select one: a.250.149 b.250.148 c.250.146 d.250.66
2020 NEC: 250.146(D) The correct answer is: 250.146
Four metal 4"-Square boxes with 1-gang metal plaster rings are roughed into a wall that will be covered with sheetrock. The plaster rings are 1/2" rise and the sheetrock is 5/8". Self-grounding 120-volt duplex receptacles are to be installed at each box. The home run is stubbed up out of the slab with PVC to hit the first box, and EMT is used to loop the other boxes together. The neutral, EGC, and ungrounded conductors are "pigtailed" in the first three boxes and are connected directly to the receptacle in the last box. Does the NEC® require the ground at the last box to be bonded to this box where the ground WAS bonded to the first box? Select one: a.Yes b.No
2020 NEC: 250.148 The correct answer is: Yes
NEC® Sections 250.20, 250.21, and 250.22 state when a system is required, permitted, or not permitted to be grounded. Which of these transformer secondaries is required to be grounded?I. 120 to 12-volt AC transformer for a low-voltage lighting systemII. 480 to 120/240-VAC, 1Ø, 3-wire to a panelboardIII. 480 to 120-VAC for a single phase motor and it's control circuit Select one: a.I only b.I, II & III c.I & III only d.I & II only e.II & III only
2020 NEC: 250.20(A) | 2020 NEC: 250.20(B) The correct answer is: II & III only
A transformer is supplied by a 277-volt circuit. The transformer delivers 24 volts for use in a control circuit. One of the two 24-volt wires is required by the NEC® to be grounded. Select one: a.True b.False
2020 NEC: 250.20(A)(1) The correct answer is: True
Where installed as overhead conductors outside of a building, AC systems of less than 50 volts ___ grounded. Select one: a.shall be permitted to be b.shall not be c.shall be
2020 NEC: 250.20(A)(3) The correct answer is: shall be
A 240/480 to 120/240-volt, single-phase transformer is supplied from a 480-volt circuit and delivers power to a 120-volt load. X2-X4 is connected to 120-volt load terminal L1 and X1-X3 is connected to load terminal L2. If X1-X3 is also connected to a grounding electrode conductor, ___.I. the secondary voltage to ground is stabilizedII. the secondary fuses will open if the secondary is fusedIII. the secondary windings will rapidly overheat and burn in two, unless the secondary is fused Select one: a.I only b.I or II only c.II or III only d.III only e.II only
2020 NEC: 250.20(B) The correct answer is: I only
An alternating current system of 50 to 1000 volts is required to be grounded where ___. Select one: a.the system is 3-phase, 4-wire, delta-connected in which the midpoint of one phase winding is used as a circuit conductor b.the system is 3-phase, 4-wire, wye-connected in which the neutral is used as a circuit conductor c.the maximum voltage to ground does not exceed 150 volts d.all of these
2020 NEC: 250.20(B) The correct answer is: all of these
NEC® Section 250.20(B)(3) requires that a three-phase, four-wire, delta-connected transformer, in which the midpoint of one phase winding is used as a circuit conductor, be grounded. A diagram of such a transformer is shown at ___ in Figure 304.02. Select one: a.I only b.II only c.either I or II d.neither I nor II
2020 NEC: 250.20(B)(3) The correct answer is: I only
An example of a system that is permitted but not required to be grounded is a ___ system. Select one: a.240-V, 1-phase, 3-W b.240-V, 3-phase, 3-W c.both a & b d.neither a nor b
2020 NEC: 250.21(A) The correct answer is: 240-V, 3-phase, 3-W
An electrical system not required to be grounded is a ___. Select one: a.240-volt, three-phase, 3-wire, delta system b.480/277-volt, 4-wire, three-phase wye system serving 277-volt loads c.three-phase, 4-wire, 208/120-volt, wye system d.240/120-volt, 4-wire, three-phase delta system e.single-phase, 3-wire, 120/240-volt system
2020 NEC: 250.21(A) The correct answer is: 240-volt, three-phase, 3-wire, delta system
___ are required to be installed on ungrounded 3Ø, 3-wire systems. Select one: a.Ground detectors b.Ground detectives c.Ground defectors d.none of these
2020 NEC: 250.21(B) The correct answer is: Ground detectors
Ground detectors would be installed on which of the following systems?I. 480-volt, 3Ø, 3W (ungrounded) II. 208/120-volt, 3Ø, 4WIII. 120/240-volt, 3Ø, 4W Select one: a.I only b.I, II & III c.II & III only d.II only e.I & II only
2020 NEC: 250.21(B) | 2020 NEC: 250.36 The correct answer is: I only
___ are not permitted to be grounded. Select one: a.Alternating-current systems of 1 kV and over b.Separately derived systems c.Circuits for electric cranes operating over combustible fibers d.None of these - they are all required to be grounded.
2020 NEC: 250.22 The correct answer is: Circuits for electric cranes operating over combustible fibers
Which of the following is not required by Section 250.24 for the main bonding jumper? Select one: a.It shall be installed in each service disconnect enclosure. b.It shall be re-identified at the terminals when furnished with insulation in any color other than green or natural gray. c.It shall connect the grounded system conductor (neutral) to the equipment grounding conductor. d.It shall be unspliced.
2020 NEC: 250.24 The correct answer is: It shall be re-identified at the terminals when furnished with insulation in any color other than green or natural gray.
Sections 250.24(A) and 250.28 require which of the following to be connected together at the service entrance?I. grounded conductor (neutral) II. MBJ III. GEC Select one: a.I, II & III b.II & III only c.I & III only d.I & II only
2020 NEC: 250.24(A) | 2020 NEC: 250.24(B) The correct answer is: I, II & III
Refer to Figure 304.20. Should the neutral bar in the panelboard be connected to its metal enclosure? Select one: a.Yes b.No
2020 NEC: 250.24(A)(5) The correct answer is: No
Refer to the drawing of electrical equipment shown below. Which of the connections (#1, #2 & #3) should be installed? Select one: a.#1 only b.#1, #2 & #3 c.#2 only d.#3 only e.#1 & #2 only f.none of these
2020 NEC: 250.24(B) The correct answer is: #3 only
This "gutter service" is to be built on the exterior back wall of a free-standing building. Three fused safety switches, one main breaker panelboard, and one MLO (main-lug-only) panelboard are installed above the gutter.Refer to the installation shown in Figure 304.21. Safety switches B, C, and E are fused. Switches B and E feed main lug only panels inside the building. Panel A is a main breaker panel. Panel D is MLO and is fed from Switch C. MBJs should be installed in ___.I. the wireway II. Switches B, C & E III. Panel A IV. Panel D Select one: a.II & III only b.III & IV only c.III only d.II, III & IV only e.I only
2020 NEC: 250.24(B) The correct answer is: II & III only
A ___ shall be installed in each service disconnecting means. Select one: a.main bonding jumper b.raceway c.grounding electrode d.none of the above
2020 NEC: 250.24(B) The correct answer is: main bonding jumper
Section ___ of the NEC® states that when an AC system operates at less than 1000 volts with a grounded conductor, the grounded conductor must be run and bonded to each service disconnect. Select one: a.250.24(C) b.250.36 c.250.10 d.none of these
2020 NEC: 250.24(C) The correct answer is: 250.24(C)
This "gutter service" is to be built on the exterior back wall of a free-standing building. Three fused safety switches, one main breaker panelboard, and one MLO (main-lug-only) panelboard are installed above the gutter.Refer to the installation shown in Figure 304.21. The service is 120/240-volt, 3Ø, 4-wire. Safety switch C is rated at 200 A and fused at 200 A and will feed MLO panelboard D. Panelboard D is 3Ø, 4-wire. The NEC® requires that the neutral be bonded to the metal enclosure inside ___. Select one: a.PB D b.Sw. C c.either a or b d.both a & b
2020 NEC: 250.24(C) The correct answer is: Sw. C
The grounded conductor is permitted to be ___ the GEC.I. a smaller size thanII. the same size asIII. a larger size than Select one: a.I or II or III b.III only c.II or III only d.I or II only e.I only
2020 NEC: 250.24(C)(1) The correct answer is: II or III only
The grounded circuit conductor is always the neutral. Select one: a.True b.False
2020 NEC: 250.26(4) The correct answer is: False
Under what conditions is the main bonding jumper permitted to be larger than required by 250.28(D)? Select one: a.it may always be larger b.where a particular fault hazard exists c.it may never be larger d.under conditions of qualified supervision and maintenance
2020 NEC: 250.28 The correct answer is: it may always be larger
Where the main bonding jumper is a screw only, the NEC® requires that it be identified with ___.I. a green finish, visible when the screw is installedII. a hexagonal headIII. a listing mark, visible when the screw is installed Select one: a.I & II only b.I, II & III c.III only d.II or III only e.I or III only f.I only
2020 NEC: 250.28(B) The correct answer is: I only
___ of the NEC® is normally used to size the main bonding jumper. Select one: a.Table 250.102(C)(1) b.T 250.28(D)(1) c.T 250.122 d.T 250.66
2020 NEC: 250.28(D)(1) The correct answer is: Table 250.102(C)(1)
Table ___ of the NEC® is used to size the system bonding jumper of a separately derived AC system. Select one: a.250.102(C)(1) b.250.122 c.300.5 d.250.66
2020 NEC: 250.28(D)(1) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 250.102(C)(1)
The requirements for grounding equipment in health care facilities are found in Article ___. Select one: a.500 b.250 c.517 d.none of these
2020 NEC: 250.3 (Table) The correct answer is: 517
Where livestock are housed in a second building that is supplied by a grounded system, the copper equipment grounding conductor, where run underground to the second building, shall be ___. The wiring method is directly buried cable.I. insulated II. covered III. bare Select one: a.II or III only b.I only c.I or III only d.I or II only e.I or II or III
2020 NEC: 250.3 (Table) | 2020 NEC: 547.5(F) The correct answer is: I or II only
A separately derived AC system ___ direct electrical connection between its circuit conductors and those service-supplied circuit conductors from another system. Select one: a.has no b.is permitted to have a
2020 NEC: 250.30 I-Note The correct answer is: has no
An emergency or standby power generator is classified as a separately derived system provided that its neutral ___ common with that of the normal supply. Select one: a.is b.is not
2020 NEC: 250.30 I-Note The correct answer is: is not
When a 480 to 120/208-volt, 3Ø, 4-wire transformer feeds a main breaker panelboard, the neutral is permitted to be connected to the grounding electrode conductor and the equipment grounding conductor(s) ___. Select one: a.in the transformer enclosure b.in the panelboard c.either a or b
2020 NEC: 250.30(A)(1) The correct answer is: either a or b
A grounding electrode is required at a separate building or structure under which of the following conditions? Select one: a.more than one branch circuit is installed b.one grounded system feeder is installed c.one ungrounded system feeder is installed d.all of the above
2020 NEC: 250.32(A) The correct answer is: all of the above
Where multiple branch circuits are to be installed and there is not an existing grounding electrode at the second building or structure, ___. Select one: a.one or more grounding electrodes must be installed at the second building b.an equipment ground must be installed with the branch circuits c.both a and b d.neither a nor b
2020 NEC: 250.32(A) The correct answer is: both a and b
Since Section 250.32(B) identifies the supply conductors to a second building as a "feeder or branch circuit," all equipment grounding conductors are sized according to ___. Select one: a.250.32(A)(1) b.250.96 c.Table 250.66 d.Table 250.122
2020 NEC: 250.32(B) The correct answer is: Table 250.122
Where an equipment grounding conductor is run with the feeder or circuit from a first building to a separate building, the size of the EGC is based on ___. Select one: a.the size of the main breaker in the service panelboard b.the ampere rating of the overcurrent device protecting the feeder or circuit c.the size of the largest ungrounded feeder or circuit conductor d.none of these
2020 NEC: 250.32(B) The correct answer is: the ampere rating of the overcurrent device protecting the feeder or circuit
You are going to run a 120/208-volt, 3Ø, 4-wire feeder (with EGC) in PVC from one building to another. The panel at the second building has an insulated neutral bar and a ground bar that is bonded to the metal panel can (enclosure). A GEC has also been installed from the ground bar to the grounding electrode. You will ___.I. connect the neutral to the neutral bar II. connect the EGC to the ground barIII. install a main bonding jumper between the neutral bar and the ground bar Select one: a.I & II only b.I, II & III c.I only d.II only e.II & III only
2020 NEC: 250.32(D) The correct answer is: I & II only
Scenario 305.1A 120/240-volt, 3-ph, 4-wire feeder with an EGC, without GFPE, is to be installed underground in Schedule 40 PVC to feed a main breaker panelboard that is located in another building. The feeder originates from a 200-A safety switch that contains two each 200-A fuses and a 150-A fuse. In the panel at the 2nd building, all ungrounded conductors are connected to the main breaker and the EGC is connected to the ground bar.Refer to Scenario 305.1. The following conductors will be installed in the PVC:• Two 3/0 conductors and one 1/0 AWG ungrounded circuit conductor• One 6 AWG grounded circuit conductorThe panel at the second building has an insulated neutral bar and a ground bar that is bonded to the metal panel can (enclosure). A GEC has also been installed from the ground bar to the grounding electrode. How should the feeder neutral be connected in the panel at the second building?I. Connect the neutral to the neutral bar.II. Use a main bonding jumper to connect the neutral bar to the ground bar. Select one: a.I only b.II only c.both I & II d.neither I nor II
2020 NEC: 250.32(D) The correct answer is: I only
One, 20 amp, 120/240-volt, 1Ø multi-wire branch circuit is installed underground (in PVC) to serve receptacles and lighting in the parking attendant's "shack" at Park-and-Fly. Do you need to connect the neutral and the ground bar together in the safety switch on the "shack"? Select one: a.Yes b.No
2020 NEC: 250.32(D) The correct answer is: No
One commercial building is supplied with 208/120-volt, 4-wire, three-phase power from another building on the same property and under the same management. The feeder is protected in the first building with a 200-ampere circuit breaker, and the conductors are run underground in PVC. Three ungrounded conductors, a neutral conductor, and an equipment grounding conductor are contained in the PVC. At the second building, the neutral and equipment grounding conductors are required to be ___. Select one: a.kept separated, and the neutral is required to be connected to a grounding electrode b.kept separated, and the equipment grounding conductor is required to be connected to a grounding electrode c.bonded together, and not required to be connected to a grounding electrode d.connected to a grounding electrode e.kept separated, and grounding either conductor is optional
2020 NEC: 250.32(D) The correct answer is: kept separated, and the equipment grounding conductor is required to be connected to a grounding electrode
Section ___ of the NEC® states that normally non-current-carrying metal parts of portable generators can be bonded to the generator frame. Select one: a.250.36 b.250.32 c.250.34(A)(2) d.250.30(1)
2020 NEC: 250.34(A)(2) The correct answer is: 250.34(A)(2)
On a portable generator, the neutral conductor is required to be bonded to the frame of the generator. Select one: a.True b.False
2020 NEC: 250.34(C) The correct answer is: True
High-impedance grounded neutral systems are permitted to serve 277-volt loads. Select one: a.True b.False
2020 NEC: 250.36 The correct answer is: False
For high-impedance grounded neutral systems, the grounded system conductor shall have an ampacity of not less than the maximum current rating of the grounding impedance and shall be ___ AWG copper, or larger. Select one: a.4 b.8 c.3 d.6
2020 NEC: 250.36(B) The correct answer is: 8
The purpose of the grounding electrode conductor and the grounding electrode is to establish a ground-fault path to open the circuit overcurrent protective device. Select one: a.True b.False
2020 NEC: 250.4(A)(1) The correct answer is: False
You installed the GEC for the purpose of ___.I. dissipating overvoltages and reducing shock hazardsII. carrying fault currents Select one: a.I only b.II only c.both I & II d.neither I nor II
2020 NEC: 250.4(A)(1) The correct answer is: I only
Many engineers require the equipment grounding conductor to be connected to a ground rod (grounded) at each light pole base. The purpose of this connection to earth is to ___.I. facilitate operation of the overcurrent protective deviceII. limit the voltage to groundIII. drain leakage or static currents to the earth Select one: a.I only b.II only c.III only d.I & II only e.II & III only
2020 NEC: 250.4(A)(1) The correct answer is: II & III only
Systems are grounded to provide a path for ___.I. fault current II. lightning III. short-circuit current Select one: a.I, II & III b.II only c.II & III only d.III only e.I & III only f.I & II only
2020 NEC: 250.4(A)(1) The correct answer is: II only
NEC® Section 250.4(A)(2) deals with ___. Select one: a.exothermic welds in grounding systems b.bonding between the equipment grounding conductor and the circuit grounded conductor c.sizing of circuit grounded conductors d.grounding electrically conductive materials enclosing electrical circuits
2020 NEC: 250.4(A)(2) The correct answer is: grounding electrically conductive materials enclosing electrical circuits
Which of the following is not a required characteristic of a grounding path according to Section 250.4(A)(5)? Select one: a.It must be capable of safely carrying maximum ground fault current. b.It must be equipped with ground-fault monitors. c.It must have sufficiently low impedance to limit the voltage to ground. d.It must not depend on the earth as a ground path.
2020 NEC: 250.4(A)(5) The correct answer is: It must be equipped with ground-fault monitors.
A primary reason for equipment grounding is to provide an effective ground-fault current path. The impedance of the grounding path is directly related to the amount of time a fault exists before the OCPD operates. When impedance is higher, the fault lasts ___ time. Select one: a.a longer period of b.the same amount of c.a shorter length of
2020 NEC: 250.4(A)(5) The correct answer is: a longer period of
The earth is not acceptable as the sole equipment grounding conductor or effective ground-fault current path due to ___. Select one: a.capacitive reactance b.inductive reactance c.high impedance of the earth d.none of these
2020 NEC: 250.4(A)(5) The correct answer is: high impedance of the earth
The purpose of maintaining a low impedance fault-current return path is to ___. Select one: a.quickly open an OCPD b.direct lightning strikes to ground c.drain static electricity to ground d.all of these e.none of these
2020 NEC: 250.4(A)(5) The correct answer is: quickly open an OCPD
All of the following are acceptable as a grounding electrode at a separate building or structure EXCEPT ___. Select one: a.a 1/2-inch trade size rigid metal conduit b.a plate electrode at least 12" × 12" × 1/4" c.a 5/8-inch iron or steel rod at least 8' long d.a 3/4-inch galvanized rigid metal conduit
2020 NEC: 250.52(A)(5) The correct answer is: a 1/2-inch trade size rigid metal conduit
When grounding electrode conductors are installed in metal conduit for physical protection, the conduit must be ___. Select one: a.bonded to the service-equipment enclosure b.bonded to the grounding electrode c.both a and b d.neither a nor b
2020 NEC: 250.64(E) The correct answer is: both a and b
___ can be used to connect grounding conductors and bonding jumpers. Select one: a.Listed clamps b.Exothermic welding c.Listed pressure connectors d.Any of these
2020 NEC: 250.8 The correct answer is: Any of these
Solder connections are not among the methods permitted by NEC® 250.8 for connecting the main bonding jumper because solder has a low melting temperature and fault currents can generate enough heat to melt the solder and destroy the connection. Select one: a.True b.False
2020 NEC: 250.8 The correct answer is: True
NEC® Section 250.8 requires equipment grounding conductor connections to be made by which of the following methods? Select one: a.listed pressure connectors b.listed clamps c.exothermic welding d.any of these
2020 NEC: 250.8 The correct answer is: any of these
All equipment grounding conductors and grounding buses in service panels must be ___. Select one: a.marked with white tape b.insulated from one another c.bonded together d.painted or marked green
2020 NEC: 250.8 The correct answer is: bonded together
In general, the connection means for equipment bonding jumpers and electrical grounding conductors are the same. Section 250.8 permits the equipment bonding jumper connection to be made by all of the following means, except for ___. Select one: a.listed pressure connections b.sheet metal screws c.exothermic welding d.listed clamps
2020 NEC: 250.8 The correct answer is: sheet metal screws
Section 250.90 requires that an equipment bonding jumper be sized to carry the circuit current that it must carry during normal circuit operation. Select one: a.True b.False
2020 NEC: 250.90 The correct answer is: False
Which of the following Code Sections requires the non-current-carrying metal parts of the service equipment to be bonded together? Select one: a.250.4(B)(1) b.250.92(A) c.250.66 d.250.112
2020 NEC: 250.92(A) The correct answer is: 250.92(A)
What Code reference requires CATV ground rods to be connected to the building service ground rod, as one method of tying the two systems together? Select one: a.810.21(J) b.830.100(D) c.820.93
2020 NEC: 250.94 | 2020 NEC: 820.93 The correct answer is: 820.93
Section 250.96(B) permits equipment to be ___ in order to minimize electromagnetic interference (often called "noise"). Select one: a.isolated b.specially grounded c.shielded d.sheathed
2020 NEC: 250.96(B) The correct answer is: isolated
Section 250.97 requires a bonding jumper to be used to provide continuity around knockouts, except where the largest knockout is used or the enclosure is listed for use without bonding. This applies for circuits of which of the following voltage systems?I. 120/240 V, 1Ø, 3-W II. 208Y/120 V, 3Ø, 4-W III. 480Y/277 V, 3Ø, 4-W Select one: a.I only b.II only c.III only d.II & III only e.I & II only
2020 NEC: 250.97 The correct answer is: III only
A 1/2-inch flex lighting tail is installed between a 4"-Square box and a 277-volt luminaire. The FMC is being used as your EGC. The only accessible entry into the 4"-Square box is a combination 1/2- 3/4" KO. You tried to carefully remove the 1/2-inch KO without disturbing the 3/4 KO, but you broke loose one of the two metal points holding it in place. Will you need to install a bonding bushing on the flex connector inside the box to avoid violating the NEC®? Select one: a.Yes b.No
2020 NEC: 250.97 The correct answer is: Yes
When conductor temperature increases, the resistance of the conductor increases. This causes the ampacity of the conductor to ___. Select one: a.decrease b.stay the same c.increase
2020 NEC: 310.15(B)(1) | 2020 NEC: 310.15(B)(2) The correct answer is: decrease
Isolated ground receptacles are identified by a(n) ___. Select one: a.red triangle b.red color c.orange triangle d.green dot
2020 NEC: 406.3(D) The correct answer is: orange triangle
A three-phase, four-wire, delta-connected system in which the midpoint of one phase winding is grounded is often known as a "delta with a high-leg." Where installed in a panelboard, NEC® Section 408.3(E) requires which phase to be the high-leg? Select one: a.A b.B c.C d.N
2020 NEC: 408.3(E) The correct answer is: B
Which of the following articles in the NEC® contain requirements for GFCI protection of receptacles? Select one: a.620 b.680 c.555 d.551 e.all of these
2020 NEC: 555 | 2020 NEC: 620 | 2020 NEC: 680 | 2020 NEC: 551 The correct answer is: all of these
A common bonding grid for a permanent swimming pool is formed by connecting together, with a bonding conductor, all metal parts associated with the pool. These include the metallic parts of the pool structure, forming shells and mounting brackets of lighting fixtures, metal ladders and other metal fixtures attached to the pool, metal equipment associated with the water circulating system, pool covers and similar metal parts. The conductor used for this bonding is ___. Select one: a.required to be solid copper not smaller than size 8 AWG b.permitted to be solid aluminum if insulated and not smaller than size 8 AWG c.required to be insulated copper, stranded, and not smaller than size 8 AWG d.required to be copper not smaller than size 2 AWG e.permitted to be bare, insulated, or covered copper if not smaller than size 6 AWG
2020 NEC: 680.26(B) The correct answer is: required to be solid copper not smaller than size 8 AWG
You are going to build a restaurant on a barge that will float in Galveston Bay. The barge will be moored to a leased space in a marina. Table 250.3 is a list of additional grounding requirements. Additional Code sections that must be considered for this completed installation include ___.I. 555.37 II. 550.4 III. 547.9 Select one: a.I only b.I, II & III c.III only d.II only e.I & II only
2020 NEC: Table 250.3 The correct answer is: I only
This "gutter service" is to be built on the exterior back wall of a free-standing building. Three fused safety switches, one main breaker panelboard, and one main lug only panelboard are installed above the gutter.Refer to the 800-amp 120/208-volt 3-ph, 4-wire installation shown in Figure 304.21. 750 kcmil conductors are installed from the utility transformer to the gutter. Panel A is a 225-amp MB panelboard and the conductors will be tapped in the gutter. This installation is outside and you will install a myers hub in the top of the gutter with a RMC nipple into the bottom of the panel through eccentric KOs. You will need to install a bonding bushing on this nipple. The smallest BJ you can connect between the bonding bushing and the ground bar in the panel is ___ AWG. Select one: a.4 b.2 c.2/0 d.1/0 e.3
225 A 4/0 Cu 2 AWG2020 NEC: 310.16 | 2020 NEC: 250.102(C) | 2020 NEC: 250.66 (Table) The correct answer is: 2
Refer to Figure 205.7. A 250-amp breaker in the 277/480 volt panel supplies power to the transformer. A set of 250 kcmil conductors is installed from this breaker to the transformer. The minimum size bonding jumper for the FMC between the 277/480 volt panel and the transformer is ___ AWG. Select one: a.4 b.2 c.1/0 d.1 e.3
250 A 4 AWG2020 NEC: 250.102(D) | 2020 NEC: 250.122 (Table) The correct answer is: 4
Scenario 305.10A 500 KVA, 480 delta-to-208/120-volt, 3-ph, 4-W transformer is to be installed. You have decided to "ground and bond" everything in the transformer enclosure. • One set of secondary conductors is installed from the transformer to a 400-A Main Breaker (MB) panelboard. There will be two parallel conduits to this 400-A panel. Each conduit will contain 4 each 3/0 conductors.• A second set of secondary conductors is installed from the transformer to a 225-A MB panelboard. One conduit will be installed between this 225-amp panel and the transformer. The conduit will contain 4 each 4/0 conductors.• A third set of secondary conductors is installed from the transformer to a 600-A safety switch fused at 500 amps. Three parallel conduits will be installed between the transformer and this switch. There will be four each 2/0 conductors installed in each of the three conduits.• And finally, a fourth set of secondary conductors is installed from the transformer to a 400-A panelboard that contains a 300-A main. There will be two parallel conduits to this 350-A MB panel. Each conduit will contain 4 each 1/0 conductors.Refer to Scenario 305.10. The smallest bonding jumper you can install between XO and the ground bar that is attached to the transformer enclosure is ___ AWG. Select one: a.4 b.3/0 c.1/0 d.2 e.4/0
250.30(A)(1) 250.28(D) [2 x 3/0] + [1 x 4/0] + [3 x 2/0] + [2 x 1/0] [2 x 167,800] + [1 x 211,600] + [3 x 133,100] + [2 x 105,600] = 1,157,7001,157,700 x .125 = 144,713 cmils 3/0 AWG per T.82020 NEC: 250.30(A)(1) | 2020 NEC: 250.102(C)(1) (Table) Note 1 The correct answer is: 3/0
Refer to Figure 205.4. A 120/240-volt, 1-ph, 3-wire service is to be installed to serve a 200-Amp service. The conduit will have two ungrounded conductors and one grounded conductor. The ungrounded conductors will be 3/0 AWG copper conductors. The load on the neutral will be 70 amps. The smallest neutral that can be installed is a ___ AWG conductor. Select one: a.4 b.1 c.2 d.6 e.3
3/0 AWG is the largest ungrounded conductor in conduit 4 AWG4 AWG can carry 70 amps The correct answer is: 4
A 400-A, 3Ø main lug panel will be fed with one conduit from a 300-Amp, 3-pole breaker in a 120/208-volt, 3-ph, 4-wire panelboard. The feeder will consist of three 350 kcmil conductors (one for AØ, one for BØ, and one for CØ) plus a grounded conductor. Most of the loads are 120-volt, 1-phase and the neutral load is calculated to be 140 amps.Refer to Scenario 205.2. The smallest neutral that can be run is a ___ AWG. Select one: a.1 b.2 c.4 d.3 e.1/0
300 A 4 AWG vs 140 A load 1/0 The correct answer is: 1/0
Refer to Figure 307.32. Section 3 contains a 300-amp switch that feeds a 3Ø, 480-volt piece of equipment through the two parallel conduits exiting the bottom of the section. Each conduit contains three 1/0 AWG conductors. The minimum size of each of the copper BJs in Section 3 is ___ AWG. Select one: a.2 b.6 c.1 d.4 e.1/0
300 A 4 AWG2020 NEC: 250.102(D) | 2020 NEC: 250.122 (Table) The correct answer is: 4
Refer to Figure 206.4. A 300-amp breaker in the 277/480 volt panel supplies power to the transformer. Four 350 KCMIL conductors are installed from the transformer to the breaker. The minimum size equipment grounding jumper for the FMC between the 277/480 panel and the transformer is ___ AWG. Select one: a.2 b.6 c.1 d.3 e.4
300 amp = 4 AWG2020 NEC: 250.122 and T.250.122 The correct answer is: 4
A 120/208-volt switchgear is shown in Figure 307.32. The 1000-amp main is fed with parallel sets of 300 kcmil THHN/THWN aluminum conductors. The minimum size of each of the copper conductors connected between the ground bar and each service pipe is ___ AWG. Select one: a.1/0 b.2 c.3/0 d.4 e.2/0
300 kcmil AlT.250.102(C)(1) 2 AWG Cu2020 NEC: 250.102(C) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 2
Refer to Figure 205.7. A 350-amp breaker in the 277/480 volt panel supplies power to the transformer. A set of 600 kcmil conductors is installed from this breaker to the transformer. The minimum size bonding jumper for the FMC between the 277/480 volt panel and the transformer is ___ AWG. Select one: a.4 b.1/0 c.2 d.1 e.3
350 A 3 AWG2020 NEC: 250.102(D) | 2020 NEC: 250.122 (Table) The correct answer is: 3
You are going to install the three-section 1000-amp, 120/208-volt, 3-ph, 4-wire service switchboard as shown in Figure 307.32. Each service conduit contains 4 each 300 kcmil THHN/THWN aluminum conductors. From a 3-pole 350-amp breaker in Section 3, a branch circuit is run in parallel conduits exiting the bottom. Each of these conduits contains 3 each 4/0 AWG aluminum conductors for the 3-phase load. The minimum size of each of the two copper conductors, connected between the ground bar and each branch circuit pipe, is ___ AWG. Select one: a.4 b.3 c.6 d.2 e.1/0
350 Amps 3 AWG Cu2020 NEC: 250.102(D) | 2020 NEC: 250.122 (Table) The correct answer is: 3
Refer to Figure 205.17. The minimum size bonding jumper for each FMC between the transformer and Panel LK is ___ AWG. Select one: a.1/0 b.2/0 c.2 d.3/0 e.1
350 kcmil 2 AWG2020 NEC: 250.102(C) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 2
Refer to Figure 205.17. The smallest permitted size system bonding jumper for Panel LK is ___ AWG. Select one: a.6 b.1 c.2/0 d.3/0 e.2
350 x 2 = 700 kcmil 2/0 AWG2020 NEC: 250.28(D) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 2/0
Service Panel MDP, shown in Figure 205.6, has a 1200-amp main breaker. Each conduit contains 350 kcmil conductors. The minimum size main bonding jumper is ___ AWG or kcmil. Select one: a.4/0 b.250 c.350 d.2 e.3/0
350 x 4 = 1400 kcmil 1400 x .125 = 175 kcmil 4/0 AWG2020 NEC: 250.28(D) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 4/0
What is the smallest size wire permitted to be used as a main bonding jumper in a 1200-A fused safety switch? The safety switch is fed from a transformer with four parallel sets of 350 kcmil wire. Select one: a.3/0 AWG b.4/0 AWG c.2/0 AWG d.1/0 AWG e.250 KCMIL
350 x 4 = 1400 kcmil then: 1400 x .125 = 175,000 cm 4/0 AWG2020 NEC: 250.28(D) | 2020 NEC: 250.102(C)(1) (Table) The correct answer is: 4/0 AWG
A 208/120-volt, 3-ph, 4-wire panelboard will be fed with one conduit. This service panel contains a 200-Amp main breaker. The conductors supplying the service will consist of three 4/0 AWG ungrounded conductors (one for AØ, one for BØ, and one for CØ) plus a grounded conductor. The calculated neutral load is 90 amps. The smallest neutral that can be run is a ___ AWG. Select one: a.4 b.8 c.3 d.6 e.2
4/0 is the largest ungrounded conductor in conduit 2 AWG vs 230.42(A) [90A load] 3 AWG The correct answer is: 2
Refer to Figure 308.23. Load #3 is a 3-phase motor and is fed with 3/0 AWG conductors. The smallest EGC you can install between the ground bar in the pull box and Load #3 is ___ AWG. Select one: a.2 b.3 c.3/0 d.1/0 e.1
400 A 3 AWG vs. 3/0 AWG per 250.122(A)2020 NEC: 250.122(A) The correct answer is: 3
As a consideration for the receptacle outlet box installation in BCES Room B114, the stud-to-finish dimension is ___. Select one: a.1" b.5/8" c.17/8" d.11/4" e.11/8"
5/8" rock + 3/8" for tile = 1" The correct answer is: 1"
A load is fed with 250 kcmil conductors in two parallel conduits from Panel LC as shown in Figure 205.18. The smallest equipment grounding conductor permitted to be installed in each conduit is ___ AWG. The circuit conductors are connected to a 500-amp breaker in the panel. Select one: a.1 b.1/0 c.3 d.4 e.2
500 A 2 AWG2020 NEC: 250.122(F) | 2020 NEC: 250.122 (Table) The correct answer is: 2
A 350-Amp, 277/480-volt, 3Ø, 4-wire service consists of three 500 kcmil ungrounded conductors and one grounded conductor. The smallest grounded conductor that can be installed for this service is ___ AWG or kcmil where the neutral load is unknown but could be the same as any ungrounded conductor since all the loads are 277-volt lighting. Select one: a.2 b.1 c.500 d.1/0 e.3
500 is the largest ungrounded conductor in conduit 1/0 vs 230.42(A) [350A load] 500 The correct answer is: 500
When ___ are installed in a conduit from one building to a 2nd building, the NEC® requires that one or more grounding electrodes be installed. There is not an existing grounding electrode at the 2nd building. The circuits originate from a 120/208-volt, 3Ø, 4-W panel in the main building and include an EGC in the conduit.I. two "hots" (for a 208-volt load) plus one "hot" with a neutral for 120-volt loads II. three "hots" and one neutral - these serve only 120-volt loads Select one: a.I only b.II only c.either I or II d.neither I nor II
Article 100 defines multiwire branch circuit.2020 NEC: 250.32(A) Exc The correct answer is: I only
Tags used for lockout/tagout may include ___. Select one: a.The length of time the equipment is expected to be out of service b.The name of the worker who placed the tag c.The phone number of the worker who placed the tag d.All of the above
The correct answer is: All of the above
The ___ is the distance from exposed energized conductors or circuit parts where bare skin would receive the equivalent of 1.2 cal/cm2. Select one: a.Restricted Approach Boundary b.Prohibited Approach Boundary c.Limited Approach Boundary d.Arc Flash Boundary
The correct answer is: Arc Flash Boundary
___ is where conductors and metal equipment are connected to establish electrical continuity and conductivity. Select one: a.Grounding b.Bonding
The correct answer is: Bonding
___ is where conductors and metal equipment are connected together. Select one: a.Grounding b.Bonding
The correct answer is: Bonding
The NFPA 70E® recommends ___ training for electrical workers. Select one: a.Instructor led classroom b.On the job c.Computer based d.Both a and b
The correct answer is: Both a and b
Class I hazardous locations are those areas made hazardous by the presence of combustible dust. Select one: a.True b.False
The correct answer is: False
The BCES fire alarm annunciator panel is located in ___. Select one: a.Boiler Room D156 b.Room B145 c.Foyer B101 d.Hallway A127A
The correct answer is: Foyer B101
The conductors shown above at Point ___ in Figure 205.3 are service-drop conductors. Select one: a.L b.J c.G d.H
The correct answer is: G
One of the most important goals of the Multi-Employer Worksite Policy from OSHA is to ensure that ___. Select one: a.Every contractor on the worksite receives a citation b.Good communication occurs between the contractors working on the site c.Only the contractor responsible receives a citation d.The General Contractor will enforce safety on the worksite
The correct answer is: Good communication occurs between the contractors working on the site
NFPA 70E® requires that the contract employer inform its employees of ___. Select one: a.Hazards the host employer has communicated to the contract employer b.The time to show up for work c.Information related to upcoming OSHA site audits d.Any previous citations the host employer has been cited for by OSHA
The correct answer is: Hazards the host employer has communicated to the contract employer
Generator ___ shown in Figure 304.03 is connected to a 3-Pole transfer switch. Select one: a.I b.II c.both I and II d.neither I nor II
The correct answer is: I
In Figure 303.05, the main bonding jumper is shown at Point ___. Select one: a.I b.II c.III d.IV
The correct answer is: I
A ___ conductor is considered to be a current-carrying circuit conductor.I. grounded II. ungrounded III. grounding Select one: a.I, II & III b.II only c.I & II only d.I only e.II & III only
The correct answer is: I & II only
Refer to Figure 301.02, shown above. Flex (FMC) is used between the switch and the motor. A "hot," a neutral, and a grounding conductor were installed in the EMT and the flex. The insulation on the "hot" has been damaged and the copper is touching the motor terminal housing. The fault current path to trip the circuit breaker will travel through ___.I. the EMT II. the MBJ III. the GEC Select one: a.II & III only b.I only c.III only d.I, II, & III e.I & II only
The correct answer is: I & II only
Which of the following are considered to be current-carrying conductors?I. neutral conductor II. ungrounded conductor III. grounding conductor Select one: a.I & II only b.II only c.I & III only d.II & III only e.I, II & III f.I only
The correct answer is: I & II only
Which of the following are measured in ohms (Ω)?I. inductive reactance II. capacitive reactance III. counter-electromotive force Select one: a.I only b.III only c.I & II only d.I, II & III e.I & III only
The correct answer is: I & II only
Which of the following three-phase electrical distribution systems is grounded?I. 120/208-volt, three-phase, four-wireII. 277/480-volt, three-phase, four-wireIII. 480-volt, three-phase, three-wire Select one: a.III only b.I only c.I, II & III d.II & III only e.II only f.I & II only
The correct answer is: I & II only
During lightning strikes, electrons seek to return to ___.I. ground (earth) II. the power source Select one: a.I only b.II only c.both I & II d.neither I nor II
The correct answer is: I only
Shown in Figure 303.02 is a 277/480-volt, 3-ph, 4-wire transformer supplying a panel. If a ground fault occurs when the ungrounded conductor touches EMT #1, the fault current will travel through the ___ to get back through the transformer windings and finally to the OCPD to cause it to open.I. EMT II. SBJ III. secondary neutral conductor Select one: a.I only b.I & III only c.II & III only d.I, II & III e.III only f.I & II only
The correct answer is: I, II & III
Although air is a good insulator, ionized air is conductive and helps to sustain arcs when an electrical arc causes the air to be ionized. Select one: a.True b.False
The correct answer is: True
The challenges facing the job foreman include ___.I. material storage II. manpower scheduling III. tool storage Select one: a.II & III only b.I, II & III c.III only d.II only e.I & III only f.I & II only
The correct answer is: I, II & III
When a ground fault occurs in a 208-volt, 1Ø branch circuit, the fault current must travel through the ___ to get back through the OCPD to cause it to open. The 208-volt circuit originates in a 120/208-volt, 3-ph, 4-wire service panelboard.I. equipment grounding conductor II. main bonding jumper III. utility grounded conductor Select one: a.I only b.III only c.II & III only d.I & II only e.I, II & III f.I & III only
The correct answer is: I, II & III
Which of the following voltage systems is solidly grounded?I. 120/208-volt, 3Ø, 4-wireII. 120/240-volt, 3Ø, 4-wireIII. 277/480-volt, 3Ø, 4-wire Select one: a.II only b.I, II & III c.I & III only d.I & II only e.I only
The correct answer is: I, II & III
Shown in Figure 303.01 is a 277/480-volt, 3-ph, 4-wire transformer supplying a panel. If a ground fault occurs when the ungrounded conductor touches EMT #1, the fault current will travel through the ___ to get back through the transformer windings and finally to the OCPD to cause it to open.I. separate EGC II. EMT III. SBJ IV. secondary neutral conductor Select one: a.I & II only b.I, III & IV only c.II & III only d.I, II & III only e.I only f.I, II, III & IV
The correct answer is: I, II, III & IV
Shown in Figure 303.03 is a 277/480-volt, 3-ph, 4-wire transformer supplying a panel. If a ground fault occurs when one of the ungrounded 480-volt, 1Ø circuit conductors touches EMT #1, the fault current will travel through the ___ to get back through the transformer windings and finally to the OCPD to cause it to open.I. separate EGC II. EMT III. SBJ IV. secondary neutral conductor Select one: a.I, II, III & IV b.II & III only c.I only d.I, II & III only e.I & II only f.I, III & IV only
The correct answer is: I, II, III & IV
In Figure 303.05, the grounding electrode conductor is shown at Point ___. Select one: a.I b.II c.III d.IV
The correct answer is: II
A 277-volt circuit originates in a 277/480-volt, 3-ph, 4-wire panelboard and is installed in EMT without a separate EGC. If a ground fault occurs in the branch circuit, the fault current must travel through which of the following to cause the OCPD to operate?I. The grounding electrode conductorII. The metal branch circuit racewayIII. The system bonding jumper Select one: a.I, II & III b.I only c.II only d.I & III only e.II & III only f.I & II only
The correct answer is: II & III only
In Figure 303.05, the equipment grounding conductor is shown at Point ___. Select one: a.I b.II c.III d.IV
The correct answer is: III
A written, documented electrical safety program is ___ than a verbal one. Select one: a.Just as effective b.More effective c.Less effective
The correct answer is: More effective
Which of the following devices is not recommended for performing absence of voltage tests? Select one: a.High input impedance contact voltage tester b.Digital multimeter c.Noncontact voltage tester d.Solenoid voltage tester
The correct answer is: Noncontact voltage tester
When are overcurrent protective devices (OCPDs), such as fuses, circuit breakers, and protective relays allowed to be modified? Select one: a.OCPDs cannot be modified at any time b.Any time c.When it is required by company policies and procedures d.When it is needed to get equipment started
The correct answer is: OCPDs cannot be modified at any time
The ___ step is probably the most important step in a lockout/tagout procedure. Select one: a.Isolate the power source b.Apply a ground to drain off the residual energy c.Place a lock and tag d.Test for the absence of voltage
The correct answer is: Test for the absence of voltage
A 120-volt circuit is installed in EMT without a separate EGC. The circuit originates in a 120/208-volt, 3-ph, 4-wire panelboard. To cause the OCPD to operate, when a ground fault occurs in the branch circuit, the fault current must travel through the system (or main) bonding jumper. Select one: a.True b.False
The correct answer is: True
All stairways and ladders used in construction, alteration, repair, and demolition workplaces are covered by OSHA requirements. Select one: a.True b.False
The correct answer is: True
An adequate supply of potable water shall be provided on jobsites. Select one: a.True b.False
The correct answer is: True
___ signs, such as those used to warn against high voltage, shall be used to bring attention to a potentially hazardous condition which, if not avoided, will result in death or serious injury. Select one: a.Danger b.Caution c.Traffic d.Directional e.Warning f.Exit
The correct answer is: Warning
The symbol used for impedance in an electrical formula is ___. Select one: a.I b.R c.Z d.Ω e.X
The correct answer is: Z
Circuits HA-1, -4, and -11 with a neutral and circuits HA-2, -3, and -5 with a second neutral have been pulled in EMT from a 277/480-volt, 3Ø, 4W panelboard to fluorescent luminaires that have been installed in several classrooms in a school. If the wire from breaker 5 comes in contact with the wire from breaker 11, ___ will occur. Select one: a.a backfeed b.a ground fault c.a short circuit
The correct answer is: a backfeed
Ionization of the air around an electrical arc can be a problem because the air becomes ___ and can cause the arc to last longer. Select one: a.an insulator b.a conductor
The correct answer is: a conductor
Circuits HA-1, -4, and -11 with a neutral have been pulled in EMT from a 277/480-volt, 3Ø, 4W panelboard to some high-bay luminaires that have been installed in a warehouse. If the wire from breaker 4 comes in contact with the neutral, ___ will occur. Select one: a.a backfeed b.a short circuit c.a ground fault
The correct answer is: a short circuit
Before developing a plan for the completion of a job, the foreman should ___. Select one: a.look at the prints b.read the contract c.read the specifications d.all of these
The correct answer is: all of these
Classified hazardous locations include ___. Select one: a.dry-cleaning plants b.petroleum refineries c.plants that create sawdust d.all of these Feedback
The correct answer is: all of these
Entries made in the daily log by a job foreman should include ___. Select one: a.the names of crew members who arrive late to the site b.notes concerning any new hazards found after inspecting the site c.equipment delivered to the site from the shop d.all of these
The correct answer is: all of these
In addition to his own experience and education, the architect utilizes ___ to provide a complete, quality, cost-effective project. Select one: a.engineers b.municipal ordinances c.building codes d.all of these
The correct answer is: all of these
In addition to his project manager, the electrical job foreman interacts with ___ on a construction project. Select one: a.estimators b.inspectors c.other trades d.all of these
The correct answer is: all of these
Safety programs include provisions for frequent and regular inspections of construction ___. These are performed by competent persons designated by the employers. Select one: a.equipment b.jobsites c.materials d.all of these
The correct answer is: all of these
The OSHA section for general safety and health has requirements for many topics. Included among these are requirements for ___. Select one: a.first aid b.accident prevention c.safety training d.all of these
The correct answer is: all of these
The foreman is required to develop ___. Select one: a.material schedules b.manpower schedules c.equipment schedules d.all of these e.none of these - schedules will be provided
The correct answer is: all of these
The framing subcontractor has fallen behind schedule, delaying your work in a certain area. You should ___. Select one: a.notify your supervisor in writing b.notify the GC of the delay in your work c.make note of it in your daily log d.all of these
The correct answer is: all of these
The primary function(s) of an electrical job foreman is to ___. Select one: a.complete the job on schedule b.maximize the electrical contractor's profits c.minimize the electrical contractor's costs d.all of these
The correct answer is: all of these
To be considered for a job foreman's position, you should ___. Select one: a.dress in a neat and professional manner b.exhibit a willingness to accept responsibility and not blame others c.arrive at the jobsite on time d.all of these
The correct answer is: all of these
To develop a good project schedule, the foreman needs to consider ___. Select one: a.the start and end dates b.the project milestones in the GC's schedule c.the specifications and the contract d.all of these
The correct answer is: all of these
When material is delivered to the site, you should immediately ___. Select one: a.verify that all material on the order is received b.inspect the material for damage c.ensure that it is stored in a protected and secure location d.all of these
The correct answer is: all of these
When selecting a job foreman, upper management considers a person's ___. Select one: a.ability to verbally communicate b.moral behavior c.ability to provide solutions to problems d.all of these
The correct answer is: all of these
When selecting a job foreman, upper management considers a person's ___. Select one: a.safety attitude b.outward appearance c.ability to communicate in writing d.all of these
The correct answer is: all of these
Which of the following secondary voltages would be indicated on a 4-wire, open delta using a voltmeter and measuring between any two ungrounded conductors, and between any ungrounded conductor and the neutral? Select one: a.120 b.240 c.208 d.all of these
The correct answer is: all of these
A "punch list" identifies aspects of the job that are ___. Select one: a.of poor quality b.not in compliance with the specifications c.not in accordance with codes and standards d.any of these
The correct answer is: any of these
Defective tools, material or equipment shall be identified as unsafe by ___. Select one: a.physically removing them from the place of use b.locking the controls to render them inoperable c.tagging d.any of these
The correct answer is: any of these
Designated ___ are permitted to be used to gain access to a structure during demolition operations. Select one: a.passageways b.stairways c.ladders d.any of these
The correct answer is: any of these
During demolition operations, the dust produced may contain ___ or other hazardous dusts that you need to consider in your PPE requirements. Select one: a.lead b.asbestos c.silica d.any of these
The correct answer is: any of these
Prior to starting ___, a Job Hazard Analysis (JHA) should be completed. Select one: a.conduit installation in a 6-foot-deep trench b.energized electrical work c.confined space work d.any of these
The correct answer is: any of these
Selection of a general contractor can be based on ___. Select one: a.qualifications b.experience c.the lowest bid submitted d.any of these
The correct answer is: any of these
When employees are required to work within a structure to be demolished that has been damaged by ___ or other cause, the walls or floors shall be shored and braced. Select one: a.explosion b.flood c.fire d.any of these
The correct answer is: any of these
When receiving a material order, any ___ in the material delivery should be reported to your supervisor immediately. Select one: a.substituted material b.missing items c.back orders d.any of these
The correct answer is: any of these
The ___ approves and signs off on the completed work of the subcontractors and authorizes progress payments to the GC. Select one: a.architect b.owner
The correct answer is: architect
You are planning to have a forklift delivered to your jobsite for material handling. The forklift is to be used by someone on your crew. You should ___. Select one: a.have the rental company provide an operator for you b.expect someone on your crew to have experience and to be able to operate it c.plan on operating it yourself d.arrange to have members of your crew trained to operate it
The correct answer is: arrange to have members of your crew trained to operate it
When rented equipment such as a scissor lift is used on the job site, the foreman should arrange to have the equipment returned to the vendor ___. Select one: a.when requested by the GC b.at the completion of the project c.within one month d.as soon as it is no longer needed
The correct answer is: as soon as it is no longer needed
Directional signs, other than ___ signs, shall be white with a black panel. Select one: a.caution b.danger c.automotive traffic d.warning
The correct answer is: automotive traffic
Isolated ground receptacles are routinely used for ___.I. cash registers II. cord-connected data-processing equipment Select one: a.I only b.II only c.both I & II d.neither I nor II
The correct answer is: both I & II
Under conditions of maximum ground-fault current flow, an effective equipment grounding system should ___.I. incorporate adequate conductance II. not present a fire hazard Select one: a.I only b.II only c.both I & II d.neither I nor II
The correct answer is: both I & II
Unlike the components in a direct current (dc) circuit, the components in an alternating current (ac) circuit that affect current flow are resistance and ___.I. inductive reactance II. capacitive reactance Select one: a.I only b.II only c.both I and II d.neither I nor II
The correct answer is: both I and II
Under ground-fault conditions, inductive reactance will exert a powerful influence in directing the return (fault) current to flow in a path that is ___ the outgoing power "hot" conductor. Select one: a.in close proximity to b.in parallel with c.both a & b
The correct answer is: both a & b
Employees who are frequently absent or late ___. Select one: a.should be removed at the earliest opportunity b.create problems for the entire crew c.both a and b d.neither a nor b
The correct answer is: both a and b
Refer to Figure 303.04. Without knowing the size of the conductors between the wireway and Switch #3, which of the following best defines these conductors? Select one: a.tap b.feeder c.both a and b d.neither a or b
The correct answer is: both a and b
The electrical contractor's (EC's) job foreman is responsible for making sure ___. Select one: a.that employees injured on the job receive proper care b.EC policies and procedures for worker injuries are followed c.both a and b d.neither a nor b
The correct answer is: both a and b
The job foreman should avoid ___ material orders. Select one: a.rush-delivery b.last minute c.both a and b d.neither a nor b
The correct answer is: both a and b
A three-phase, four-wire, wye-connected system is normally ___ grounded. Select one: a.center (at the point where the common leads of each transformer are connected together) b.not c.delta d.corner
The correct answer is: center (at the point where the common leads of each transformer are connected together)
To avoid arcing and sparking at threaded joints in RMC and IMC, the threads must be ___ before assembly. Select one: a.cleaned b.tack-welded c.cut d.all of these
The correct answer is: cleaned
Lightning ionizes the air, thus making it a good ___. This enables electrons to travel from the clouds to the earth. Select one: a.insulator b.conductor
The correct answer is: conductor
The Furseweld® exothermic welding process is ignited with a spark gun that starts a reaction in the weld powder. The weld powder is reduced to a molten alloy of ___. Select one: a.copper b.silver c.aluminum d.cadmium
The correct answer is: copper
Furseweld® exothermic welding connections are made inside a semi-permanent graphite mold using the high temperature reaction of powdered ___. Select one: a.copper oxide and aluminum b.copper and silver c.aluminum oxide and silver d.silver and cadmium
The correct answer is: copper oxide and aluminum
As circuit resistance ___, the time it takes for an OCPD to operate decreases. Select one: a.increases b.decreases
The correct answer is: decreases
A minor deviation to the original bid ___ require a change order. Select one: a.does b.does not
The correct answer is: does
A solidly grounded system is a system in which one of the circuit conductors is grounded. This conductor ___ carry current during normal circuit operations. Select one: a.does not b.does
The correct answer is: does
GFCI protection for personnel ___ protect a person against the sensation of feeling a shock. Select one: a.does b.does not
The correct answer is: does not
A ___ is an electrical fault.I. short circuit II. ground-fault Select one: a.I only b.II only c.either I or II d.neither I nor II
The correct answer is: either I or II
A barricade is a means of obstruction to deter the passage of ___.I. persons II. vehicles Select one: a.I only b.II only c.either I or II d.neither I nor II
The correct answer is: either I or II
A ___ shall be provided at all personnel points of access to a work area where there is a break of 19 inches or more and no ramp, runway, sloped embankment or personnel hoist is provided. Select one: a.ladder b.stairway c.either a or b d.neither a nor b
The correct answer is: either a or b
Contractors cannot require any employee to work in any working conditions that are ___ and could affect their health or safety. Select one: a.hazardous b.unsanitary c.either a or b d.neither a nor b
The correct answer is: either a or b
From a legal standpoint and to prevent the removal of records without detection, a daily job journal should be ___. Select one: a.an electronic record b.a bound book c.either a or b d.neither a nor b
The correct answer is: either a or b
Only those employees who are qualified by ___ are permitted to operate equipment or machinery. Select one: a.training b.experience c.either a or b d.neither a nor b
The correct answer is: either a or b
Prior to the completion of the project, punch list items need to be ___. Select one: a.replaced b.repaired c.either a or b d.neither a nor b
The correct answer is: either a or b
The daily job journal can be used if ___. Select one: a.legal action is brought b.a dispute arises c.either a or b d.neither a nor b
The correct answer is: either a or b
The electrical contractor's (EC's) job foreman should be directly involved in incident investigations concerning the EC's ___. Select one: a.equipment b.employees c.either a or b d.neither a nor b
The correct answer is: either a or b
The ___ is responsible for ensuring that all electricians on a jobsite participate in jobsite safety training. Select one: a.electrical contractor's foreman b.general contractor
The correct answer is: electrical contractor's foreman
It is the responsibility of the ___ to initiate programs as may be necessary to comply with the OSHA requirements. Select one: a.employer b.employee c.general contractor d.state
The correct answer is: employer
Accident prevention tags shall be used as a temporary means of warning employees of a(n) ___ hazard, such as defective tools or equipment. Select one: a.existing b.potential
The correct answer is: existing
You connected the GEC to the copper main water service pipe above the ceiling. The plumber later disconnected it and has left it disconnected. Because of this, if a "hot" branch circuit conductor contacts the EGC installed with that circuit, the branch-circuit breaker will ___. Select one: a.take more than 3 times the normally required time to trip b.take approximately 2 seconds longer than normal to trip c.operate as it should
The correct answer is: operate as it should
The general contractor obtain bids from subcontractors, adds overhead and profit, and then submits the bid as a package to the ___. Select one: a.architect b.owner
The correct answer is: owner
When a separate equipment grounding conductor (wire) is installed in a metal raceway, the wire is in ___ with the raceway. Select one: a.series b.parallel
The correct answer is: parallel
Developing a good plan ___ is one of the most important steps in achieving a successful construction project. Select one: a.after the underground installation b.prior to starting the project c.after the first progress report d.during the rough-in phase
The correct answer is: prior to starting the project
Danger signs are required where an immediate hazard exists. These signs have ___ as the predominate color in the upper panel. Select one: a.white b.yellow c.red d.orange e.black f.none of these
The correct answer is: red
O'Riley's first rule for electrical installations is to make them ___. Select one: a.work b.safe
The correct answer is: safe
Electrical faults cause all the following types of stresses, except ___. Select one: a.thermal b.seismic c.magnetic
The correct answer is: seismic
A 120-volt load is operating when you open the neutral in a j-box. If you touch the neutral from the load with your left hand and the grounded metal conduit with your right hand, your body would be in ___ with the load. Select one: a.series b.parall
The correct answer is: series
A branch circuit is installed using metal conduit that will serve as the EGC. A separate EGC was not pulled in with the circuit conductors. However, a short section of flexible nonmetallic conduit was used in the middle of the run. When a bonding jumper is installed around the short section of flexible nonmetallic conduit, the jumper is in ___ with the EGC (metal conduit). Select one: a.parallel b.series
The correct answer is: series
The conductors shown above at Point J in Figure 205.3 are ___ conductors. Select one: a.feeder b.service-drop c.branch-circuit d.service-entrance
The correct answer is: service-entrance
The number of employees assigned to the crew and the skill levels of the members of the crew are determined by the foreman based on the ___ and the tasks to be performed. Select one: a.size of the project b.GC's requirements c.weather considerations d.schedule
The correct answer is: size of the project
One way of preventing static electricity as an ignition source can be accomplished through ___. Select one: a.using fabric softener or dryer sheets to remove static cling from clothing b.keeping your workspace dust free c.substituting non-conductive pads when grounding or bonding is not possible d.keeping your workspace free of flammable materials e.using anti-static soap and shampoo f.none of these
The correct answer is: substituting non-conductive pads when grounding or bonding is not possible
If a ground fault occurs, the branch circuit OCPD will open most quickly when ___. Select one: a.the branch circuit is installed in EMT and a separate EGC has been pulled b.the branch circuit is installed in EMT as the only EGC c.a ground rod is driven at the load and bonded to the metal load enclosure
The correct answer is: the branch circuit is installed in EMT and a separate EGC has been pulled
A 277/480-volt, 3-ph, 4-wire, main breaker panelboard is installed as the main service. The MBJ for this panel was misplaced and never installed. A 277-volt circuit is run in EMT from the panel to some fluorescent lay-in luminaires. If the "hot" conductor is nicked in the terminal box in the luminaire and touches the luminaire's metal enclosure, ___. Select one: a.the high current will run back through the ceiling grid to get to the breaker to cause it to trip b.the fault current will travel through the EMT and then the grounding electrode conductor to get back through the breaker and cause it to open c.the grid will be "hot" and the luminaire stays ON because the breaker doesn't "see" high fault current and therefore won't trip d.the high current will travel through the EMT instead of the neutral to trip the BC breaker
The correct answer is: the grid will be "hot" and the luminaire stays ON because the breaker doesn't "see" high fault current and therefore won't trip
A ground rod is the only grounding electrode at a service. If the GEC becomes loose when connected to the rod, the branch-circuit breakers in the service panel will take ___ amount of time to open if a ground fault occurs in one of the branch circuits. Select one: a.the same b.a longer c.a shorter
The correct answer is: the same
On a jobsite, drinking water can be dispensed from portable containers ___. Select one: a.through a tap on the container b.by dipping with a ladle or cup c.either a or b d.neither a nor b
The correct answer is: through a tap on the container
Refer to Figure 301.02. Sealtite® (LFMC) is used between the switch and the motor. The insulation on the "hot" has been damaged and the copper is touching the motor terminal housing. How much current is "seen" by the circuit breaker? A separate grounding conductor was NOT installed in either raceway. The impedance of the Sealtite® is 500 ohms. Select one: a.55 A b.923 A c.20 A d.11.45 A e.692.5 A
Ztotal = Zhot + [Zsealtite/EMT in parallel with (Zmotor/neutral)] = 24.19 ohmswhere: Zsealtite/EMT = 500 + .3 = 500.3 ohmsand: Zmotor/neutral = 25 + .2 = 25.2 ohmsand then: Zsealtite/EMT in parallel with (Zmotor/ neutral) = 1 ÷ [1/500.3 + 1/25.2] = 23.9916 and finally: Ztotal = .2 + 23.9916 = 24.19 I = E ÷ Ztotal = 277 ÷ 24.19 = 11.45 amps The correct answer is: 11.45 A
Scenario 305.25A 225 KVA, 480 delta to 208/120-volt, 3-ph, 4-w transformer is to be installed. • The first set of secondary conductors is installed from the transformer to a 400-A MB panelboard. There will be two parallel conduits to this 400-A panel. Each conduit will contain 4 each 3/0 conductors.• A second set of secondary conductors is installed from the transformer to a 225-A MB panelboard. One conduit will be installed between this 225-amp panel and the transformer. The conduit will contain 4 each 4/0 conductors.You have decided to "ground and bond" everything in the transformer enclosure.Refer to Scenario 305.25 to answer this question. The smallest SBJ you can install for this system is ___ AWG. Select one: a.3/0 b.2 c.2/0 d.1/0 e.3
[2 x 3/0] + [1 x 4/0] [2 x 167,800] + [1 x 211,600] = 547,200 cmils547.2 kcmil 1/0 AWG per T.250.102(C)(1)2020 NEC: 250.30(A)(1) | 2020 NEC: 250.102(C)(1) The correct answer is: 1/0
The purpose of connecting the main bonding jumper is to ___. Select one: a.lead stray currents away from the equipment b.minimize static electricity c.provide an effective path for ground-fault current d.minimize shock hazard
2020 NEC: 100_Bonding Jumper, Main The correct answer is: provide an effective path for ground-fault current
On architectural plans, "O.H." is an abbreviation for ___. O.H. typically appears adjacent to detail callouts. Select one: a.or higher b.opposite hand c.overhead d.on hold
@ Rm A112 Detail 4 on Dwg A8.1 shows O.H.This detail shows 24"-deep millwork on the left and 30"-deep millwork on the right For Rm A112 the millwork detail is Opposite Hand (mirror image) because the deeper portion is on the left. The correct answer is: opposite hand
The conduit for the drinking fountains on the east side of BCES Corridor D130 can be installed straight up from the box, through the stud wall behind the equipment. Select one: a.True b.False
As discussed in the curriculum manual, this is a chase-type, half wall, Type G. The conduit must be routed to an adjacent wall. The correct answer is: False
The conduit installed from the marquee sign into BCES is trade size ___. Select one: a.1 b.4 c.3 d.11/4 e.none of these
The correct answer is: 1
BCES Room D136 has a(n) ___ ceiling. Select one: a.13'-0" b.9'-2" c.open to deck d.9'-0" e.19'-0" f.14'-4"
The correct answer is: 13'-0"
On the north wall in BCES Room B108, the depth of the upper cabinets (on the east end of the casework) is ___". Select one: a.36 b.18 c.30 d.24 e.14
The correct answer is: 14
The depth of the upper cabinets on the south and east walls in BCES Room C121 is ___". Select one: a.14 b.30 c.24 d.36 e.18
The correct answer is: 14
If you were standing on the south side of Area D, looking north, and wanted to see how the building exterior should appear, you would look at Detail ___ on BCES Drawing A7.1. Select one: a.6 b.12 c.18 d.none of these
The correct answer is: 18
The south elevation of BCES Area D is shown in Detail ___. a.12/A7.1 b.23/A7.1 c.18/A7.1 d.not shown
The correct answer is: 18/A7.1
The mounting height of marker boards in the BCES Pre-K classrooms is ___ inches AFF to the writing surface. Select one: a.48 b.30 c.24 d.36 e.32
The correct answer is: 24
At BCES, there are ___ electrically-operated water heaters. Select one: a.4 b.3 c.5 d.7 e.2
The correct answer is: 3
There are several receptacles installed on the east wall in BCES Room A121. The receptacle connected to Circuit 8 is mounted at ___" AFF. Select one: a.30 b.34 c.40 d.18 e.36
The correct answer is: 40
When roughing in the outlet box for the fire alarm horn/strobe outlet in BCES Room B114, the box should be set in the wall so that the center of the box is ___ above the originally poured, concrete floor level. The dimensions of the horn/strobe are 4-1/2" wide by 6" high and it mounts to a 4-square box. Select one: a.6'-11" b.7'-11/2" c.7'-01/2" d.6'-11/2" e.6'-8"
The correct answer is: 7'-11/2"
The conduit installed from the BCES marquee sign is stubbed up into Room ___. Select one: a.A128 b.D154 c.B145 d.A118 e.A132
The correct answer is: B145
BCES Elevation 23/A7.1 shows a door between Column Lines H and F1. This is door ___. Select one: a.B105 b.D156 c.D135B d.B122 e.D150 f.none of these
The correct answer is: D150
The BCES mechanical contractor makes electrical connections to any equipment he provides. Select one: a.True b.False
The correct answer is: False
The location of site luminaires is as shown on the MEP drawing. However, the exact location can be changed when the electrician deems it necessary. Select one: a.True b.False
The correct answer is: False
As used at BCES, FSD is an abbreviation for a ___. Select one: a.Fire Suppression Device b.Fire Smoke Damper c.Fail Safe Damper d.Fire System Disconnect
The correct answer is: Fire Smoke Damper
___ is a special moisture-resistant type of gypsum board attached to wall studs and used in damp areas, such as in bathrooms. Select one: a.Durock® b.Greenboard
The correct answer is: Greenboard
The walls in BCES Room B114 are covered with ___.I. paint II. vinyl III. ceramic tile Select one: a.II & III only b.I only c.III only d.I & II only e.I & III only f.II only
The correct answer is: I & III only
BCES Panel LD is located in Main Electrical Room (D154). Conduits can be stubbed up, turned, and then extended through the ___ wall to the required outlets.I. north II. east III. south IV. west Select one: a.I or II only b.III or IV only c.II or III only d.any of these
The correct answer is: I or II only
The BCES duct bank installed between the pad-mount transformer and the Texas New Mexico power distribution pole is required to be ___.I. at least 24" below finished gradeII. encased by red concreteIII. surrounded by rebar Select one: a.I only b.I, II & III c.I & II only d.II only e.I & III only
The correct answer is: I, II & III
Which of the following determines the severity of an electric shock?I. the path taken by current through bodyII. the length of time current flowsIII. the amount of current flowing Select one: a.II & III only b.I & II only c.I & III only d.I, II & III e.II only
The correct answer is: I, II & III
The floor finish in BCES Room B136 is ___.I. ceramic tile II. carpet III. VCT Select one: a.II & III only b.I only c.I & II only d.II only e.III only f.I, II & III
The correct answer is: II only
Circuit ___ is to be used to supply power to the BCES irrigation system. Select one: a.LE-6 b.LE-2 c.HL-13 d.HL-20 e.I-20
The correct answer is: LE-2
Circuit ___ is to be used to supply power to the BCES marquee sign. Select one: a.HL-20 b.I-20 c.HL-13 d.LE-2 e.LE-6
The correct answer is: LE-6
For the BCES project, the electrician would use a(n) ___ plan drawing to determine the circuits used for the site luminaires. Select one: a.mechanical b.plumbing c.food-service d.landscape e.MEP f.electrical
The correct answer is: MEP
For the BCES project, the electrician would use a(n) ___ plan drawing to locate the site luminaires. Select one: a.plumbing b.landscape c.food-service d.MEP e.mechanical f.electrical
The correct answer is: MEP
The electrician would use a(n) ___ plan drawing to determine the types of site luminaires used on the BCES project. Select one: a.MEP b.plumbing c.food-service d.electrical e.mechanical f.landscape
The correct answer is: MEP
The wiring contained in the conduit between the meter pedestal and the BCES utility transformer is installed by ___. Select one: a.Texas New Mexico b.the EC c.neither a nor b
The correct answer is: Texas New Mexico
If lime gets into a worker's boots, it can cause burns to the skin. Select one: a.True b.False
The correct answer is: True
Some toxic elements can occur naturally in the soil. Select one: a.True b.False
The correct answer is: True
The wood used in BCES walls to provide substantial support for wall-hung equipment and millwork is fire-treated lumber. Select one: a.True b.False
The correct answer is: True
The walls in BCES Room B119 are ___. Select one: a.VWC over sheetrock b.ceramic tile c.painted sheetrock d.none of these
The correct answer is: VWC over sheetrock
You are to rough in for a strobe and two light switches in BCES Room C139. If these boxes are mounted on the first stud away (24" back) from the door frame, could there be any conflicts? Select one: a.No. No possible obstructions are shown. b.Yes. The marker board might cover them. c.Yes. The tack board might cover them. d.Yes. The millwork might cover them.
The correct answer is: Yes. The millwork might cover them.
On a construction project, lime is used in ___. Select one: a.mortar b.cement c.stucco d.all of these
The correct answer is: all of these
To successfully complete a building project, the electrician is to make these installations in accordance with ___. Select one: a.NEC® requirements b.the construction documents c.local AHJ requirements d.all of these
The correct answer is: all of these
When working with lime, potential hazards include ___. Select one: a.eye b.inhalation c.skin d.all of these
The correct answer is: all of these
Dampers can be open or closed by ___. Select one: a.manual operation b.the force of gravity c.electric motors d.any of these
The correct answer is: any of these
___ is a special cement-based type of board attached to wall studs and used in wet areas, such as in bathrooms. Select one: a.Wonderboard® b.Durock® c.Hardibacker® d.any of these
The correct answer is: any of these
The columns at BCES ___ sprayed with fireproofing materials before the column wraps are built. Select one: a.are not b.are
The correct answer is: are
The drinking fountains on the east side of BCES Corridor D145 ___. Select one: a.do not require electricity b.are connected to Circuits LD-68 & 70
The correct answer is: are connected to Circuits LD-68 & 70
The MDP (Main Distribution Panel) shown on Drawing MEP1.1 and the MSB (Main Switchboard) shown on Drawings E3.4 and E5.1 ___. Select one: a.are two different pieces of equipment b.are the same piece of equipment
The correct answer is: are the same piece of equipment
At BCES, the ___ are used to provide hot water to heat environmental areas (rooms). Select one: a.boilers (B-1 & B-2) b.water heaters (GWH-1 & GWH-2)
The correct answer is: boilers (B-1 & B-2)
The MEP roof plan at BCES shows the location for the ___.I. exhaust fans II. supply fans Select one: a.I only b.II only c.both I & II d.neither I nor II
The correct answer is: both I & II
When roughing in outlet boxes at BCES, which of the following must be considered when mounting the boxes and running raceways?I. adjacent millwork II. fire extinguisher cabinets Select one: a.I only b.II only c.both I & II d.neither I nor II
The correct answer is: both I & II
Electricians must be concerned with height transitions between areas with different ___ heights. Select one: a.roof b.ceiling c.both a and b d.neither a nor b
The correct answer is: both a and b
If lime is inhaled, you should ___. Select one: a.remove the employee from the lime area to fresh air b.seek immediate medical attention c.both a and b
The correct answer is: both a and b
If lime is taken into your eyes, you should ___. Select one: a.flush your eyes with large quantities of water b.seek immediate medical attention c.both a and b
The correct answer is: both a and b
Four outlets symbolized with are shown at the computer desks on the east side of BCES Room B136. The installation of these outlet boxes ___. Select one: a.are in the wall with the center of the box at 40" AFF b.are in the P.LAM with the center of the box at 18" AFF c.cannot be determined from the drawings d.are in the wall with the center of the box at 30" AFF e.are in the wall with the center of the box at 18" AFF
The correct answer is: cannot be determined from the drawings
When working with lime, eye protection requirements are ___. Select one: a.safety glasses and a face shield b.chemical-type goggles c.either a or b d.neither a nor b
The correct answer is: either a or b
The fire alarm control panel at BCES is ___. Select one: a.surface mounted b.flush mounted
The correct answer is: flush mounted
When lime is activated, it starts a chemical reaction that produces ___. Select one: a.moisture b.heat c.both a and b d.neither a nor b
The correct answer is: heat
At BCES, heated air is provided to the rooms by a system utilizing ___. Select one: a.electric duct heaters b.hot water
The correct answer is: hot water
The FSDs in the BCES Computer Lab (Room B141) are located ___. Select one: a.in the ductwork above the ceiling b.in the wall at 80" AFF c.in the wall at 42" AFF d.below the raised floor
The correct answer is: in the ductwork above the ceiling
On the casework detail for the north wall in BCES Room B108, a receptacle ___ shown. Select one: a.is b.is not
The correct answer is: is not
Lime is an alkaline material and is activated when exposed to ___. Select one: a.heat b.moisture c.both a and b d.neither a nor b
The correct answer is: moisture
The casework elevation of the south wall in BCES Room B129 is shown in Detail ___. Select one: a.14/A7.2 b.9A/A8.1 c.4/A8.1 d.9B/A8.1 e.not shown
The correct answer is: not shown
A person working in the BCES kitchen controls the supply and exhaust fans (SF-21 and EF-22) by operating ___ that are wall-mounted near the cooking hood. Select one: a.one single-pole switch b.two separate three-pole safety switches c.one three-pole safety switch d.two separate single-pole switches
The correct answer is: one single-pole switch
The floor finish in BCES Room D151 is ___. Select one: a.ceramic tile b.quarry tile c.sealed concrete d.glazed tile pavers e.carpet f.VCT
The correct answer is: quarry tile
The type of roof used on BCES is commonly referred to as a ___ type. Select one: a.rubber b.tar and gravel c.composite
The correct answer is: rubber
The floor finish in BCES Room A118 is ___. Select one: a.carpet b.sealed concrete c.VCT d.ceramic tile
The correct answer is: sealed concrete
On the BCES plans, "SIM" is an abbreviation for ___. Select one: a.simulated b.similar c.striated imitation marble d.scaled in metrics
The correct answer is: similar
Roof penetrations at BCES require the use of ___. Select one: a.metal pitch pans b.special rubber boots
The correct answer is: special rubber boots
The roof drains at BCES are tied into the ___ sewer lines. Select one: a.sanitary b.storm c.neither a nor b
The correct answer is: storm
Keyed note 4 on BCES Drawing A2.8 denotes ___ for a particular marker board. Select one: a.the length b.the mounting height c.both a and b d.neither a nor b
The correct answer is: the length
A minimum of ___ set(s) of batter boards is required to establish the building lines when forming a slab. Select one: a.four b.three c.one d.two
The correct answer is: two
Fire alarm and lighting control outlet boxes are to be installed adjacent to the door in BCES Room C139. If the switch box is mounted on a stud that is set at 17 feet west of Column T/14, would the box be covered by the millwork? Select one: a.No b.Yes
West edge of millwork to finish at Column T/14 wrap:(13'-0") + (4'-0") + (4") = 17'-4" YES The correct answer is: Yes
