IEC 2A

FMC is used in Figure 208.4. If the flex is 6' in length, which of the supports can be omitted? Select one: a. #3 only b. #2 only c. #1 and #3 only d. #2 and #3 only e. #1, #2, and #3 f. none of these

#1, #2, and #3

Each conduit, connected to the switch box shown above in Figure 208.32, will contain one "hot," one neutral, and one EGC. A duplex receptacle will be installed in the box. The shallowest box permitted for this installation is ___" deep. All conductors are 14 AWG THHN/THWN. Select one: a. 21/4 b. 21/2 c. 23/4 d. 2 e. 31/2

(4 CCCs + 1 EGC + 2 for device)(2.0) = 14 in 3 23/4 inches deep will work The correct answer is: 23/4

Where a conduit passes through an exterior wall and enters a panel mounted on the interior, seals or plugs ___ required. Select one: a. are b. are not

are

Chemical-specific information must always be ___ through labels and MSDS sheets. Select one: a. ready b. forwarded c. on hand d. available

available

Employers shall ensure that employees are provided with ___ to the extent necessary to protect them in the event of a spill or leak of a hazardous chemical. Select one: a. training b. information c. both a & b d. neither a nor b

both a & b

Conductors that are enclosed in Schedule 80 PVC ___. Select one: a. are protected from physical damage b. are capable of being removed c. both a or b d. neither a nor b

both a or b

A switch box will contain the following:(one) isolated ground receptacle(two) 12/2 with ground AC cables (BX) with exterior connectorsThe shallowest switch box you can use for this installation is 3" x 2" x ___". Select one: a. 23/4 b. 21/2 c. 2 d. 31/2 e. 21/4

for devices: 2; CCCs: 4; EGCs: 0; iso. GCs: 1 total wires: 7 The correct answer is: 31/2

Standard lighting track shall not be equipped with ___. Select one: a. general-purpose receptacles b. aluminum lampholders c. general-duty lampholders d. any of these

general-purpose receptacles

In a run of conduit, when couplings and connectors are loose this will ___ the amount of time required for a circuit breaker to open when a short-circuit occurs. Select one: a. have no effect on b. increase c. decrease

have no effect on

Training must also include the physical and ___ hazards of the chemicals and the measures that employees can take to protect themselves from these hazards. Select one: a. emotional b. health c. stress d. none of these

health

Where a 3600 watt, 240-volt load is supplied from a 2-pole, 30-amp breaker in a 120/240-volt, 1-ph, 3-wire panelboard each ungrounded conductor carries ___ amps. Select one: a. 17.3 b. 18.75 c. 10 d. 15 e. 30

15

The installation shown above in Figure 211.2 violates the provisions of ___ in the NEC®. Wiring Method 1 is UF cable and Wiring Method 2 is Schedule 40 PVC. Select one: a. 300.5 b. 225.26 c. both a & b d. neither a nor b

300.5

Where above ground exterior branch circuit conduits enter a building, the conduit is required to be sealed "to prevent condensation" per ___ in the NEC®. Select one: a. 300.50(F) b. 230.8 c. 230.92 d. 300.7(A) e. 300.5(G)

300.7(A)

Refer to Figure 208.36. Which industrial cover/box combination will NOT violate the NEC®? All the conductors are 12 AWG.I. 4 x 11/2 square with 5.0 in3 industrial coverII. 411/16 x 11/4 square box with a 4.2 in3 industrial coverIII. 4 x 21/8 square box with a 3.6 in3 industrial cover Select one: a. I only b. III only c. I & II only d. II & III only e. II only

4 hots + 5 neutrals + 1 Gnd + 2 for device = 12 #12s12 x 2.25 cu. inches = 27.0 cu. in. required4 x 4 x 1 1/ 2 w/5.0 in 3 ring: 21.0 + 5.0 = 26.0 too small violation4 11/ 16 x 4 11/ 16 x 1 1/ 4 w/4.2 in 3 ring: 25.5 + 4.2 = 29.7 big enough4 x 4 x 2 1/ 8 w/3.6 in 3 ring: 30.3 + 3.6 = 33.9 big enough The correct answer is: II & III only

Schedule 40 PVC is to be installed in a straight run between two junction boxes on the back exterior wall of a strip shopping center. The summertime temperature is 100°F and the wintertime temperature is -5°F. An expansion fitting would be required in this 80' run of PVC because it would expand ___ inches between winter and summer. Select one: a. 5.325 b. 3.85 c. 3.408 d. 4.26 e. 3.08

4.26 X 80/100 = 3.408 The correct answer is: 3.408

Within sight is visible and no more than ___ feet from the object. Select one: a. 75 b. 15 c. 25 d. 50 e. none of these

50

In a 30-foot run of conduit containing one conductor the maximum cross-sectional area that can be occupied by the conductor is ___%. Select one: a. 53 b. 100 c. 60 d. 31 e. 40

53

The 12" x 12" junction box, shown above in Figure 207.13, has a depth (d) of 6". Measured from the point in the box where the conductors emerge from the conduit, the minimum length of the conductors is ___". Select one: a. 9 b. 3 c. 12 d. 6 e. 15

6

One conduit is run from Panel LA to a load as shown in Figure 205.16. The 1/0 AWG circuit conductors are connected to a 150-amp breaker in the panel. What is the smallest equipment grounding conductor permitted to be installed in the conduit? Select one: a. 3 AWG b. 1/0 AWG c. 6 AWG d. 2 AWG e. 4 AWG

6 AWG

A bare ___ bonding jumper is used for the lightning protection at the BCES parking lot pole bases. Select one: a. 8 AWG solid copper b. 6 AWG copper-clad stranded c. 4 AWG stranded copper d. none of these

6 AWG copper-clad stranded

You are to surface-mount 39' of 12-2 MC cable on a wall between two boxes as shown above in Figure 208.11. You will use 1-hole straps to securely fasten the cable to the wall. The minimum number of straps required is ___. Select one: a. 11 b. 10 c. 8 d. 7 e. 5

8

The screw holes for mounting a cover on Box I, shown above in Figure 208.15, are tapped for ___ screws. Select one: a. 10-24 b. 10-32 c. 6-32 d. 8-32 e. none of these

8-32

Per 220.43(B) in the NEC®, ___ VA must be allocated for the lighting track when determining the calculated load on the service where a 12' length of lighting track is installed in the conference room in an office building. Select one: a. 150 b. 900 c. 1800 d. 0

900

What size equipment grounding conductor is to be installed between the safety switch and BCES Chiller 2? Select one: a. 1/0 AWG b. 1 AWG c. 2 AWG d. 2/0 AWG e. 3 AWG

: 2 AWG

Which of the flexible cables or cords listed below could be used to connect a piece of equipment that operates at 480 volts 3-ph? Select one: a. SEO b. SVEO c. SP-3 d. SJEO e. any of these f. none of these

Note that many cables or cords contain conductors with insulation that is rated for 300 volts. The correct answer is: SEO

The ampacity of each conductor of a 16/3 AWG multiconductor Type SPT-2 flexible cord, used to supply utilization equipment which is fastened-in-place, is ___ amps. See NEC® T. 400.4 for available sizes and which conductors are current carrying. Select one: a. 7 b. 13 c. 12 d. 10 e. 15

Table 400.4, Note 6 1 conductor is an EGC 2 are current carrying The correct answer is: 13

Fluorescent luminaires are connected end-to-end as shown below. The "Home Run" conduit contains circuits HA-16, 18, 20 (3 "hots" + 1 neutral) and nightlight (NL) circuit HA-2. All of these circuits originate in a 277/480-volt, 3Ø, 4-W panelboard. These conductors pass through the luminaires and the circuits serve the luminaires as indicated on the illustration.Which of the following statements is true? Select one: a. This installation is not permitted by the NEC® because the voltage between conductors exceeds 150 volts. b. This installation is permitted by NEC® 410.64(C). c. This installation is not permitted by the NEC® because the normal lighting circuits do not meet the definition of a multiwire branch circuit.

This installation is permitted by NEC® 410.64(C).

As indicated on the BCES food service drawings, the fryer is gas-fired. Select one: a. True b. False

True

The plans indicate that you should install a 300-amp branch circuit in Schedule 40 PVC with a 4 AWG equipment grounding conductor. However, you did not have any 4 AWG wire so you pulled in 10 AWG instead. With a load connected, the normal circuit current will be ___ with the 10 AWG EGC (compared to using a 4 AWG EGC). Select one: a. the same b. less c. greater

the same

Qualified persons need ___ and knowledge of equipment and hazards to work safely. Select one: a. training b. experience c. education d. none of these

training

On the BCES project, ___ conduit(s) is/are installed between the MSB and Panel HK. Select one: a. three b. seven c. two d. one

two

Determine the minimum standard size wireway required for a job. A section of wireway is shown in Figure 208.62. Thirty-two 3 AWG, forty-eight 2 AWG, and eighteen 3/0 AWG THHN/THWN conductors will be installed in the wireway. Select one: a. 8" x 8" b. 6" x 6" c. 10" x 10" d. 12" x 12" e. 4" x 4" f. none of these

(.0973 x 32) + (.1158 x 48) + (.2679 x 18) = (3.1136) + (5.5584) + (4.8222) = 13.4942 in 213.4942/.20 = 67.471 10 x 10 wireway The correct answer is: 10" x 10"

The 4-point saddle shown in Figure 208.45 will be a 15° saddle. This saddle has a total of ___ degrees of bend. Select one: a. 60 b. 90 c. 45 d. 30 e. none of these

(15 + 15 + 15 + 15) = 60 The correct answer is: 60

Refer to the drawing shown below. These circuits are from a 120/240-volt, 1Ø, 3-wire panel. Each ungrounded conductor carries 16 amps. The neutral in Conduit A will carry ___ amps. Select one: a. 32 b. 0 c. 16 d. 8

0

Refer to Figure 205.15. The flex used between the breaker enclosure and the motor contains three 350 kcmil conductors. The minimum size of the EGC between the 700-A breaker and the motor is ___. Select one: a. 350 kcmil b. 3/0 AWG c. 2 AWG d. 1/0 AWG e. none of these

1/0 AWG

The smallest trade size EMT available that can be installed between two big pull boxes is ___. Select one: a. 3/8 b. 3/4 c. 1/2 d. 1 e. none of these

1/2

On the BCES project, there will be a total of ___ 21/2" conduits connected to the main switchboard. Select one: a. 12 b. 2 c. 4 d. 6

12

___ AWG ungrounded conductors are installed from BCES Transformer XE to Panel LE. Select one: a. 4 b. 3/0 c. 4/0 d. 8 e. 2

2

The width of the cable tray used on BCES is ___ inches. Select one: a. 30 b. 18 c. 12 d. 36 e. 24

24

When connected to a 1Ø piece of equipment that operates at 240 volts, a 12 AWG SJO flexible cord can carry ___ amps. Select one: a. 30 b. 25 c. 16 d. 20 e. 35

25

When connected to a 120/240-volt, 3Ø piece of equipment a 10 AWG SJO flexible cord can carry ___ amps. The equipment requires a neutral connection and this conductor should be counted as a current-carrying conductor. Select one: a. 40 b. 35 c. 30 d. 25 e. 20

25 A X 80% = 20 amps The correct answer is: 20

On the BCES prints, the main switchboard's service ground is ___. Select one: a. 500 kcmil b. 250 kcmil c. 350 kcmil d. 4/0 AWG

250 kcmil

26 feet of Type AC cable is used to connect a 2 x 4 lay-in fluorescent luminaire to a "home run" box as shown above in Figure 208.2. Supports #1 & #2 are as far from the connectors as the NEC® permits. You will have to install ___ additional supports between #1 and #2. Select one: a. more than 3 b. 0 c. 3 d. 1 e. 2

3

How many conduits for the BCES service feeder conductors are installed between the pad-mount transformer and the Texas New Mexico power distribution pole? Select one: a. 3 b. 9 c. 7 d. 4 e. 1

3

MC cable is used to connect a 2 x 4 lay-in fluorescent luminaire to a "home run" box as shown above in Figure 208.2. The length of the cable between the box and the luminaire is 26 feet. Where supports #1 & #2 are as far from the connectors as permitted ___ additional supports are required between #1 and #2. Select one: a. 0 b. 2 c. 3 d. 1 e. more than 3

3

The minimum size conduit that can be used for home runs on BCES is ___". Select one: a. 3/4 b. 1 c. 11/2 d. 1/2 e. 11/4

3/4

As shown in Figure 208.41, you will make 22.5° offsets to get from each box to the wall surface where you will surface mount EMT. To avoid violating the NEC® you can make a ___º saddle.I. 30 II. 45 III. 60 Select one: a. I or II only b. I or II or III c. I only d. none of these

360 - (22.5 + 22.5) - (22.5 + 22.5) - 90 - 90 = 90 90 ÷ 4 = 22.5 degree saddles - maximum The correct answer is: none of these

The minimum CALCULATED dimension for "width" shown in Figure 208.55 is ___ inches.Conduit G = 31/2" Conduit H = 2" Conduit J = 21/2" Conduit K = 3"Conduit L = 3" Conduit M = 3" Conduit N = 2" Select one: a. 281/2 b. 31 c. 21 d. 35 e. 28

G is the largest: [3 1/ 2" X 8] = 28" The correct answer is: 28

The minimum CALCULATED dimension for "width" shown in Figure 208.55 is ___ inches.Conduit G = 2" Conduit H = 21/2" Conduit J = 11/2" Conduit K = 2"Conduit L = 1" Conduit M = 11/2" Conduit N = 2" Select one: a. 29 b. 201/2 c. 25 d. 251/2 e. 20

H is the largest: [2 1/ 2" X 8] = 20" The correct answer is: 20

The conduit body shown above at IV in Figure 208.19 is a Type ___. Select one: a. LL b. LB c. LR d. C e. none of these

LB

___ shall not support luminaires weighing over 6 lb. Select one: a. Outlet boxes b. Lampholders c. Terminals d. None of these Feedback The correct answer is: Lampholders

Lampholders

The minimum CALCULATED dimension for "width" shown in Figure 208.55 is ___ inches.Conduit G = 4" Conduit H = 4" Conduit J = 2" Conduit K = 3"Conduit L = 4" Conduit M = 4" Conduit N = 5" Select one: a. 40 b. 41 c. 48 d. 61 e. none of these

N is the largest: [5" X 8] = 40" The correct answer is: 40

A switch box, shown above in Figure 208.32, will contain a duplex receptacle and each of the connected conduits will contain 12 AWG THHN/THWN conductors (one "hot," one neutral, and one EGC). The shallowest switch box permitted for this installation is ___ mm deep. Select one: a. 50 b. 65 c. 57 d. 90 e. 70

[4 CCCs] + [1 EGC] + [2 for device] = 77 X 36.9 cm 3 = 258.3 cm 3 90 mm deep will work The correct answer is: 90

A section of 4" x 4" wireway is shown in Figure 208.61. The maximum number of 8 AWG THHN/THWN conductors that can be installed in the wireway is ___. Select one: a. 30 b. 109 c. 63 d. 87 e. 437 f. 43

[4 x 4][.2] ÷ (0.0366) = 87.43 or 87 The correct answer is: 87

The maximum number of 2/0 AWG THHN/THWN conductors that can be installed in a 6" x 6" wireway is ___. A section of wireway is shown in Figure 208.61. Select one: a. 17 b. 32 c. 52 d. 13 e. 39 f. 30

[6 x 6][.2] = 7.2 7.2 ÷ .2223 = 32.39 or 32 The correct answer is: 32

Refer to Figure 210.18. The Equipment Grounding Conductor between the two panels carries current during ___. Select one: a. normal operation b. a short circuit c. a ground fault d. either a or b

a ground fault

The "J" designation in any of the "S-type" flexible cords designates ___. Select one: a. that it contains a jet line b. a junior size c. jacketed cable d. none of these Feedback The correct answer is: a junior size

a junior size

From the BCES telephone outlets, the EC (Electrical Contractor) is to provide a 3/4-inch conduit from the wall box to an accessible ceiling. The EC shall provide ___. Select one: a. a 4" x 4" box on conduit in the accessible ceiling b. a pull string in each conduit c. a pull wire in each conduit d. both a and b

a pull wire in each conduit

"S" loops ___ allowed for ground movement where service lateral conductors emerge from an underground raceway adjacent to a pad-mounted transformer. Select one: a. are b. are not

are

The amount of current that flows in any circuit is determined by the voltage and resistance of the circuit. Select one: a. True b. False

a. True

Refer to Figure 208.51. Conduit G is on the side that is ___ the left side of the box. Select one: a. adjacent to b. opposite

adjacent to

A comprehensive Haz Com program includes ___. Select one: a. other forms of warning b. SDS training c. employee training d. all of these

all of these

An electric-discharge luminaire utilizes a ___ for the operation of the lamp. Select one: a. starter b. thermal protector c. ballast d. none of these Feedback The correct answer is: ballast

ballast

300.6(A) in the NEC® refers to ferrous metal equipment. Which of the following metals are considered to be "ferrous?" Select one: a. stainless steel b. copper c. carbon steel d. aluminum e. all of these

carbon steel

Employers shall maintain any safety data sheets (SDSs) for hazardous ___. Select one: a. locations b. energy c. chemicals d. activities

chemicals

In vertical conduit runs, such as up through a high-rise building, conductors made of copper have support requirements that are ___ than for aluminum conductors. Select one: a. farther apart b. closer together

closer together

On the BCES prints, the engineer ___ permit lay-in light fixtures to be connected fixture-to-fixture. Select one: a. does b. does not

does not

Employers shall provide employees with ___ information and training on hazardous chemicals in the work area at the time of their initial assignment. Select one: a. occasional b. worthwhile c. effective d. timely

effective

Connection ___, shown above in Figure 211.4, can be used where the cover on the luminaire terminal box is stamped "Suitable for thru-wiring". Select one: a. I only b. II only c. either I or II d. neither I nor II

either I or II

Your only available grounding electrode is the metal underground water pipe from the water utility. You are required by the NEC® to have one other grounding electrode for your service. You could use which of the following driven electrodes?I. 8 ft of trade size 3/4 rigid metal conduitII. 10' by 5/8 inch copper-clad ground rod Select one: a. I only b. II only c. either I or II d. neither I nor II

either I or II

A junction box ___ required where cables, suitable for direct burial, are spliced underground. Select one: a. is b. is not

is not

The "W" suffix (last letter) in any of the "S-type" flexible cords designates that the cable ___. Select one: a. conductors are wound in a spiral form b. is suitable for wet locations c. is capable of withstanding a sustained wind of 60 mph d. none of these

is suitable for wet locations

Article 300 covers wiring that is factory installed in ___. Select one: a. refrigeration condenser units b. water heaters c. air-handlers d. all of the above e. none of the above

none of the above

A 400-Amp switch (F350A) is shown in Figure 205.12. The flex to the motor contains three 4/0 AWG conductors. The minimum size of the equipment grounding conductor to the motor is ___ AWG. Select one: a. 4/0 b. 6 c. 2 d. 1/0 e. none of these

none of these

Per the NEC® which of the following bends are permitted in a conduit run between two junction boxes? Select one: a. two 30° offsets plus three 90s b. two 90s plus one-45° three-point saddle plus one-12° offset c. one back-to-back 90 plus two-60° 3-point saddles d. any one of these e. none of these

two-90s plus one-45° three-point saddle plus one-12° offset = 90 + 90 + 90 + 24 = 294ºone-back-to-back 90 plus two-60° 3-point saddles = 90 + 90 + (2 x 120) = 420ºtwo-30° offsets plus three 90s = (2 x 60) + (3 x 90) = 390º The correct answer is: two 90s plus one-45° three-point saddle plus one-12° offset

On the BCES project, the booster heater is to be connected through a ___. Select one: a. ceiling-mounted J-Box b. wall receptacle at 24 inches AFF c. wall receptacle at 60 inches AFF d. wall-mounted J-Box at 24 inches AFF e. receptacle in the floor slab

wall-mounted J-Box at 24 inches AF

A grounding conductor that is installed in a conduit with circuit conductors carries current ___. Select one: a. when a ground fault occurs b. when overloads occur c. during normal operations d. only during short circuits

when a ground fault occurs

Written Haz Com programs shall describe how the labels and other forms of warning, SDS sheets, and employee information and training will be met. Select one: a. True b. False

True

lightning rod must be installed at each BCES pole lighting standard and connected to the pole. Select one: a. True b. False

True

A 120/240v 1-phase 3-wire service panel is fed with three 1 AWG copper conductors. The minimum size grounding electrode conductors connected to building steel is ___ AWG. Select one: a. 2 b. 4 c. 8 d. 6 e. 3

1 AWG Table 250.66 6 AWG The correct answer is: 6

Refer to Figure 205.4. A 120/240-volt, 1-ph, 3-wire service is to be run to serve 125-A, main breaker Panel B. As shown, one conduit will be installed for the service. The conduit will contain two 1 AWG conductors for the ungrounded conductors. Most of the loads are 240-volt, 1Ø phase without neutrals. The smallest MBJ that can be installed in Panel B is a ___ AWG. Select one: a. 4 b. 3/0 c. 2 d. 1/0 e. 6

1 AWG is the largest ungrounded conductor in conduit 6 AWGTable 250.102(C)(1) The correct answer is: 6

A load is fed with 12 AWG conductors from Panel LC as shown in Figure 206.7. The smallest equipment grounding conductor permitted to be installed in the conduit is ___ AWG. The circuit conductors are connected to a 20-amp breaker in the panel. Select one: a. 14 b. 8 c. 16 d. 10 e. 12

12

Refer to Figure 206.2. The service conduit contain three 4/0 AWG conductors for the ungrounded conductors and one 4/0 AWG conductor for the grounded conductor. The smallest GEC that can be installed to building steel is a ___ AWG or kcmil. Select one: a. 3/0 b. 4/0 c. 250 d. 350 e. 2

2

Refer to Figure 206.6. The service conduit contains three 4/0 AWG conductors for the ungrounded conductors and one 4/0 AWG conductor for the grounded conductor. The smallest GEC that can be installed to building steel is a ___ AWG or kcmil. Select one: a. 3/0 b. 350 c. 4/0 d. 250 e. 2

2

Service Panel MDP, shown in Figure 205.6, has a 175-amp main breaker. The conduit contains 2/0 conductors. The minimum size main bonding jumper is ___ AWG or kcmil. Select one: a. 4 b. 1 c. 2/0 d. 1/0 e. 3

2/0 AWG is the largest ungrounded conductor in conduit 4 AWG The correct answer is: 4

Locations within ___, in all directions, from a liquefied natural gas dispenser enclosure are classified as Class I, Division 2 locations. Select one: a. 3 m (10 ft) b. 6 m (20 ft) c. 900 mm (3 ft) d. 1.5 m (5 ft) e. 450 mm (18 in.)

2020 NEC: 514.3(B)(2) (Table) The correct answer is: 3 m (10 ft)

A location that is 9 feet from a liquefied natural gas dispenser enclosure is ___ location. Select one: a. a Class I, Div 1 b. an unclassified c. a Class I, Div 2

2020 NEC: 514.3(B)(2) | 2020 NEC: 514.3(B)(2) (Table) The correct answer is: a Class I, Div 2

Where a conduit emerges from the earth or concrete under a gasoline pump, a seal must be installed ___ after the conduit emerges from the earth or concrete. Select one: a. within 18 inches b. within 2 feet c. within 12 inches d. as the first fitting

2020 NEC: 514.9(A) The correct answer is: as the first fitting

See Figure 206.5. The service panel is fed with four 3/0 AWG copper conductors. The smallest GEC that can be installed to building steel is a ___ AWG conductor. Select one: a. 1/0 b. 3/0 c. 2 d. 4 e. 6

4

You are installing a GEC to the main water line from a 200-A, main breaker Panel LC, ___ AWG is the largest size copper wire required. As shown in Figure 205.8, the panel is fed from a transformer with one set of 3/0 AWG wire. Select one: a. 1/0 b. 2 c. 3 d. 3/0 e. 4

4

On the BCES project, the conductors installed between the MSB and Panel HB1 include ___ equipment ground conductor(s). Select one: a. two - 2 AWG b. one - 4 AWG c. two - 1 AWG d. one - 1 AWG e. two - 4 AWG

4 AWG

A load is fed with 1 AWG conductors from Panel LC as shown in Figure 206.7. The smallest equipment grounding conductor permitted to be installed in the conduit is ___ AWG. The circuit conductors are connected to a 125-amp breaker in the panel. Select one: a. 4 b. 1 c. 2 d. 3 e. 6

6

Refer to Figure 205.14. Load 1 is supplied from a 100 A circuit breaker with 3 AWG conductors. Load 2 is supplied from a 350-Amp breaker with 500 kcmil conductors. Both loads are 3-ph, 3-wire. The smallest grounding conductor that can be installed between the pull box and Load 1 is ___ AWG. Select one: a. 6 b. 2 c. 4 d. 8 e. 3

8

The size grounding electrode conductor that is connected to the steel building structure from the BCES main service is ___ AWG or kcmil. Select one: a. 250 b. 3/0 c. 4 d. 500 e. 1/0

: 250

A metal enclosure surrounding electrically operated equipment ___. a. is required to be grounded b. protects the equipment from physical damage c. provides protection for people against accidental contact with live parts

d. all of these

When working near live parts, you must know the ___ related to the work. Select one: a. tools b. parts c. dangers d. workers

dangers

Each conduit, connected to the handy box shown above in Figure 208.31, will contain one "hot," one neutral, and one EGC. A duplex receptacle will be installed in the box. The shallowest handy box permitted for this installation is ___. All conductors are 14 AWG THHN/THWN. Select one: a. 17/8 inches deep b. 11/2 inches deep c. 21/8 inches deep d. none of these - this is a Code violation

(4 CCCs + 1 EGC + 2 for device)(2.0) = 14 in 3 21/8 inches deep will work The correct answer is: 21/8 inches deep

In major repair garages, where vehicles ___ are repaired or stored, the area within 450 mm (18 in.) of the ceiling shall be considered unclassified where ventilation of at least 1 cfm/sq ft of ceiling area taken from a point within 450 mm (18 in.) of the highest point in the ceiling is provided. Select one: a. with oversized fuel tanks b. that are fueled with lighter-than-air fuels c. that have multiple fuel tanks d. with propane-fueled fleet operations

.2020 NEC: 511.3(D)(Table) that are fueled with lighter-than-air fuels

According to the NEC® an 8 AWG bare solid copper conductor has a cross-sectional area of ___ square inches. Select one: a. .017 b. .0366 c. .013 d. .051 e. none of these

013

A string of 2' x 4' lay-in fluorescent luminaires is to be connected by "looping" the wiring method. Between luminaires, the raceway entries are 6' apart. The length of the cable (or raceway) from the box to the first luminaire is 7 feet. Figure 208.3 FMC is the wiring method to be used above in Figure 208.3. The maximum distance permitted between the "home run" box and support #1 is ___ feet. Select one: a. 41/2 b. 1 c. 3 d. 10 e. 6 f. support not req'd

1

A grounding conductor that is installed in a conduit with circuit conductors carries current ___. Select one: a. when overloads occur b. only during short circuits c. when a ground fault occurs d. during normal operations

when a ground fault occurs

For the pull box shown in Figure 208.52, the minimum calculated width is ___ inches. All conductors enter the bottom and exit the right side of the box. Select one: a. 48 b. 541/2 c. 411/2 d. 331/2 e. none of these

width = (4" X 6) + (3") + (2") + (2") + (2.5") = 33.5 inches The correct answer is: 331/2

Employers shall maintain in the ___ copies of the required MSDS sheets for each hazardous chemical. Select one: a. workplace b. trailer c. office d. truck

workplace

The service shown in Figure 206.3, has a 400-amp main breaker. The service conduit contains three 500 kcmil ungrounded conductors and one 350 kcmil grounded conductor. The minimum size GEC is ___ AWG or kcmil. Select one: a. 250 b. 4/0 c. 2 d. 3/0 e. 1/0

500 kcmil 1/0 AWG from T.250.66 The correct answer is: 1/0

Which of the following 2-inch raceways has the smallest cross-sectional area? Select one: a. RMC (rigid metal conduit) b. LFMC (liquidtight flexible conduit) c. EMT (electrical metallic tubing) d. Schedule 80 PVC (nonmetallic conduit)

EMT = 3.356 80-PVC = 2.874 RMC = 3.408 LFMC = 3.246 The correct answer is: Schedule 80 PVC (nonmetallic conduit)

Chemical manufacturers and importers shall obtain or develop SDS sheets for each hazardous chemical they produce or import. These SDS sheets shall be written in ___. Select one: a. French b. Spanish c. English d. Japanese e. German f. all of these

English

Article 300 applies to wiring that is part of equipment. Select one: a. True b. False

False

Luminaires (such as "down lights") that are recessed in a grid-type ceiling are required to be secured to the building structure, according to the NEC®. Select one: a. True b. False

False

When a 1900 (4" square) box does not contain devices it is permitted to be supported by EMT if all three of the following conditions are met:1) the EMT is stubbed out of a block wall,2) the box is within 3 feet of the wall, and3) at least two other EMTs enter the box to provide additional support. Select one: a. True b. False

False

___-grade receptacles are the highest grade receptacles manufactured by the electrical industry. Select one: a. Industrial b. Hospital c. Commercial d. none of these

Hospital

___ is a type of lamp used in an HID luminaire.I. Mercury-vapor II. Metal halide III. Nickel cadmium Select one: a. I & III only b. I only c. II only d. I & II only e. I, II, & III f. II & III only

I & II only

Which of the boxes shown above in Figure 208.15 has screw holes that are tapped for 8-32 screws? Select one: a. II & III only b. I & III only c. II & IV only d. I & IV only e. I & II only

I & III only

Where a luminaire is listed for installation in a damp location, it can be installed in a ___ location.I. wet II. dry III. damp Select one: a. III only b. I or II only c. I or III only d. I, II, or III e. II or III only

II or III only

The conduit body shown above at ___ in Figure 208.18 is a Type T. Select one: a. II b. IV c. I d. III e. none of these

IV

What is the maximum number of 3 AWG THWN/THHN conductors that can be installed in a trade size 3 EMT that is installed between two enclosures that are 8 feet apart? Select one: a. 54 b. 48 c. 10 d. 36 e. 47

Table 5: #3 - .0973 sq. in. Table 4: 3-inch EMT in 40% column = 3.538 sq. in.3.538 ÷ .0973 = 36.36 36 conductorsNote that Annex C: Table C.1 is based on these calculations. The correct answer is: 36

Does the NEC® permit the installation shown above at X in Figure 208.1? The box is supported only by the conduits. The distance from the top of the head track to the bottom of the 4-SQ box is 2 inches. Both conduits are EMT and are attached to the box with steel compression connectors (not visible in drawing). Select one: a. Yes b. No

The box does NOT have threaded hubs. Also threaded conduit req'd. The correct answer is: No

A listed appliance is manufactured with a 16 AWG flexible power cord that is used for connection to a receptacle. The nameplate on the appliance contains the information: "Maximum 15 A". This appliance is considered to be protected by a 15-amp branch circuit breaker. Select one: a. True b. False

True

A written Haz Com program requires a list of chemicals known to be present in the workplace, and the methods the employer will use to inform the employees of these hazards. Select one: a. True b. False

True

Generally, flexible cords and cables shall be installed in continuous lengths without splices or taps. Select one: a. True b. False

True

On the BCES prints, the engineer specifies the use of flexible metal conduit for the connection of light fixtures. Select one: a. True b. False

True

You are to connect a 3-phase air handler unit (AHU). You decide to use 3 feet of 1/2 inch FMC (Flexible Metal Conduit or flex) since you realize that it has a motor and as such will tend to vibrate. Per the NEC®, do you need to install an EGC (Equipment Grounding Conductor) with the FMC between the disconnect switch and the AHU? The disconnect has a 30-amp rating but is fused at 20 amps. Select one: a. Yes b. No

Yes

Refer to Figure 210.18. The grounded conductor between the two panels carries current during ___. Select one: a. normal operation b. a short circuit c. a ground fault d. either a or b

either a or b

Rigid Metal Conduit (RMC) is generally made of galvanized steel or aluminum. Galvanized steel is considered to be a ___ metal. Select one: a. nonferrous b. ferrous

ferrous

For the pull box shown in Figure 208.52, the minimum calculated height is ___ inches. All conductors enter the bottom and exit the right side of the box. Select one: a. 331/2 b. 48 c. 541/2 d. 411/2 e. 421/2

height = (6" X 6) + (3") + (3.5") = 42.5 inches The correct answer is: 421/2

Refer to Figure 205.4. A 120/240-volt, 1-ph, 3-wire service is to be run to serve 125-A, main breaker Panel B. As shown, one conduit will be installed for the service. The conduit will contain two 1 AWG conductors for the ungrounded conductors. Most of the loads are 240-volt, 1Ø phase without neutrals. The smallest MBJ that can be installed in Panel B is a ___ AWG.

1 AWG is the largest ungrounded conductor in conduit 6 AWGTable 250.102(C)(1) The correct answer is: 6

On the BCES project, each conduit installed between the MSB and the disconnect switch for Chiller CH-2 contains ___ equipment grounding conductor(s). Select one: a. 1 ea 8 AWG b. 1 ea 2 AWG c. 1 ea 4 AWG d. 1 ea 1 AWG e. 2 ea 1 AWG

1 ea 1 AWG

A recessed incandescent luminaire is to be installed in a ceiling grid system. The shortest 14 AWG "fixture whip" permitted, between a 4-square 20-amp branch circuit box and the wiring compartment of the luminaire, is ___. Note that the 14 AWG wires are smaller than the 20-amp circuit breaker can protect and are therefore "tap conductors" by definition. Select one: a. 1 foot b. 1.5 feet c. 6 feet d. no minimum limit

1.5 feet

According to Table 4 in the NEC® 21/2 inch FMC has a total area of 4.909 in2. A 12' run of this flex can be filled with conductors for several circuits. However, the maximum area that can be occupied by the circuit conductors is ___ sq. in. Select one: a. 1.963 b. 2.602 c. 2.500 d. 1.522 e. 2.945

1.963

On the BCES project, the conductors installed between the main switchboard and the transient voltage surge suppressor include a ___ AWG equipment grounding conductor. Select one: a. 10 b. 2 c. 8 d. 1 e. 4

10

A 4" square box with a 2-gang plaster ring contains:(one) 12/2 with ground AC cable with exterior connector(contains hot & neutral + isolated grounding conductor)(one) 14/2 MC cable (contains a ground) with exterior connector(contains hot & neutral)(one) 14/2 MC cable (contains a ground) with exterior connector(contains sw. leg & neutral)(one) toggle switch (connected to the 14/2)(one) isolated ground receptacle (connected to the 12/2 and its isolated ground) The plaster ring has 4.3 cu. in. stamped into the metal. The smallest "4 square" box you can use and not violate the NEC® is one that is ___ inches deep. Select one: a. 11/4 b. 21/8 c. 11/2 d. none of these

12/2: AC + Iso.Gnd. in AC cable + I.G.Rec. = 2.25 x (2 + 2) = 9 cu. in. 14/2: MC#1 + MC#2 + Sw = 2.00 x (2 + 2 + 2) = 12 cu. in.One 12 AWG volume allowance for all EGCs in box = 2.25 x (1) = 2.25total: 23.25 - 4.3 for plaster ring = 18.94 4 square x 11/2" @ 21 in3 is OK The correct answer is: 11/2

A 208-volt, 1-ph piece of equipment is to be connected with SOO flexible cord. What is the smallest AWG size cord that can be used to connect the equipment? The maximum load on any one conductor is 17 amps. Select one: a. 12 b. 6 c. 8 d. 10 e. 14

14

Among the sizes listed below, the damaged power cord on a 120-volt appliance can be replaced with a 6-ft length of flexible SJO cord not smaller than ___ AWG where the appliance is to be connected to a 15-A branch circuit. Select one: a. 14 b. 18 c. 12 d. 10 e. 16

14

You are to surface mount 128' of EMT on a wall between two boxes as shown above in Figure 208.11. You will use 1-hole straps to securely fasten the EMT to the wall. The minimum number of straps required is ___. Select one: a. 15 b. 11 c. 13 d. 14 e. 12

14

Handholes are not required in metal parking lot light poles if the base is hinged and the pole is ___ feet or less in height. Select one: a. 20 b. 8 c. 30 d. 12 e. none of these

20

All fixed wiring in an aircraft hanger, but not installed in a Class 1 location shall be installed in metal raceways or shall be Type MI, ___ , or MC cable. Select one: a. FCC b. TC c. UF d. NM

2020 NEC 513.7(A) The correct answer is: TC

The Code reference for GFCI protection of receptacles in commercial garages is found at ___. Select one: a. 210.8(A)(6) b. 210.8(A)(2) c. 511.12 d. none of these

2020 NEC: 210.8(B) The correct answer is: 511.12

As shown in Figure 205.5, one conduit will be installed for the service. The 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. Select one: a. 4 b. 1/0 c. 6 d. 2 e. 3

3/0 AWG is the largest ungrounded conductor in conduit 4 AWG The correct answer is: 4

In a repair garage, which function does not constitute a minor repair. Select one: a. Brake System Repairs b. Tire Rotation c. Painting d. Engine Tune Up

2020 NEC: 511.2 Painting

Where lubrication and vehicle servicing is done at minor repair garages, the space below the floor level in a ventilated pit shall be ___. Exhaust ventilation is provided at a rate of not less than 0.3 m3/min/m2 (1 cfm/ft2) of floor area at all times that the building is occupied. Select one: a. classified as Class II, Division 2 b. classified as Class I, Division 1 c. unclassified d. none of these

2020 NEC: 511.3(C)(Table) The correct answer is: unclassified

Where major repair garages service vehicles that are fueled by lighter-than-air fuels such as natural gas or hydrogen, the area within ___ of the ceiling shall be considered unclassified where ventilation of at least 1 cfm/ft2 of ceiling area is provided. Select one: a. 12 inches b. 24 inches c. 60 inches d. 300 mm e. 18 inches

2020 NEC: 511.3(D)(Table) 18 inches

___ is defined as case or housing of apparatus, or the fence or walls surrounding an installation to prevent personnel from accidentally contacting energized parts or to protect the equipment from physical damage. Select one: a. Inaccessible b. Guarded c. Isolated d. Enclosure

: Enclosure

In aircraft hangars where electrical diagnostic equipment, electrical hand tools or portable lighting equipment are used, GFCI protection is required for all ___ receptacles.I. 125-volt, single-phase, 15 and 20-ampereII. 250-volt, single-phase, 30-ampereIII. 250-volt, three-phase, 15- and 20-ampere Select one: a. I & II only b. II only c. I, II & III d. I only e. I & III only

2020 NEC: 513.12 The correct answer is: I, II & III

Electrical wiring that is installed in and under aircraft hangar floors shall comply with the requirements for a ___ location. Select one: a. Class I, Zone 1 b. Class I, Division 1 c. Class I, Division 2 d. Class I, Zone 2 e. Class I, Zone 0

2020 NEC: 513.8(A) The correct answer is: Class I, Division 1

Where non-metallic sheathed cable is used for underground wiring in a bulk storage plant, an equipment grounding conductor ___ electrical continuity of the raceway system and the grounding of all non-current-carrying metal parts. Select one: a. shall be included to provide b. shall not be included so as to provide isolation and to prohibit

2020 NEC: 515.8(C) The correct answer is: shall be included to provide

Buried raceways and cables under Class I locations in bulk storage plants shall be considered to be within a ___ location. Select one: a. Class I, Zone 1 b. Class II, Zone 2 c. Class I, Division 2 d. Class I, Zone 0 e. Class I, Zone 2

2020 NEC: 515.9 The correct answer is: Class I, Zone 1

All space in all directions outside of but within 915 mm (3 ft) of open containers, supply containers, spray gun cleaners and solvent distillation units containing flammable liquids are considered to be a ___ location. Select one: a. Class II, Division 1 b. Class I, Division 2 c. Class I, Division 1 d. any of these e. none of these

2020 NEC: 516.4(1) The correct answer is: any of these

For application of Article 516, the interior of any open or closed container of a flammable liquid is considered to be a ___ location. Select one: a. Class I, Zone 1 b. Class I, Zone 2 c. Class I, Zone 0 d. Class I, Division 2

2020 NEC: 516.4(4) The correct answer is: Class I, Zone 0

The interior of any dip or coating tank of a flammable liquid is considered to be a ___ location. Select one: a. an unclassified b. a Class II, Division 1 c. a Class I, Division 1 d. a Class III, Division 2 e. a Class I, Division 2 f. none of these

2020 NEC: 516.4(4) The correct answer is: a Class I, Division 1

Any spray area in direct path of spray operations is considered to be a ___ location.I. Class I, Zone 1II. Class II, Division 1III. Class I, Zone 0 Select one: a. II only b. I only c. III only d. II or III only e. I or II only

2020 NEC: 516.5(C)(3) The correct answer is: I or II only

For spraying operations conducted within an open-top spray booth, the space ___ vertically above the booth and within ___ of other booth openings shall be considered a Class I, Division 2 location. Select one: a. 2 m (61/2 ft) 5 m (15 ft) b. 915 mm (3 ft) 915 mm (3 ft) c. 5 m (15 ft) 2 m (61/2 ft) d. 300 mm (1 ft) 915 mm (3 ft) e. 10 m (30 ft) 2 m (61/2 ft)

2020 NEC: 516.5(D)(3) The correct answer is: 915 mm (3 ft) 915 mm (3 ft)

When spray application equipment cannot be operated unless the exhaust ventilation system is operating and functioning properly and spray application is automatically stopped if the exhaust ventilation system fails the system is said to be ___. Select one: a. autoconnected b. interlocked c. interconnected d. electrically integrated e. interactively supported

2020 NEC: 516.5(D)(4)(2) The correct answer is: interlocked

The NEC® prohibits mounting luminaires directly to a tree. Select one: a. True b. False

: False

Where compressed natural gas dispensers are located under a canopy or enclosure that prevents the accumulation or entrapment of ignitible vapors, electrical equipment ___. Select one: a. shall be suitable for Class II, Division 1 hazardous locations b. shall be suitable for Class I, Group G requirements c. shall be suitable for Class I, Division 1 hazardous locations d. shall not be required to meet Class I, Division 2 hazardous location requirements e. shall be suitable for Class I, Division 2 hazardous locations

2020NEC: 514.3(B)(2) The correct answer is: shall not be required to meet Class I, Division 2 hazardous location requirements

As indicated on the BCES food service drawings, the fryer is connected to electrical power through a ___. Select one: a. wall-mounted J-Box b. 3Ø, 4-wire receptacle c. 20A duplex receptacle d. stubbed-up conduit

20A duplex receptacle

The shallow masonry box, shown above in Figure 208.38, will contain two 4-way switches and one three-way switch. Conduit #1 contains five wires, #2 contains four wires, #3 contains four wires, and #4 contains two wires. All conductors are 12 AWG THHN/THWN and are spliced in the box or terminated on the switches. No separate EGCs are installed. Will this installation violate the Code? Select one: a. Yes b. No

21 X 2.25 = 47.253-gang shallow box = 3(14.0) = 42 violation! The correct answer is: Yes

What size conduit(s) is to be installed between the safety switch and BCES Chiller 2? Select one: a. 3" b. 41/2" c. 4" d. 2" e. 21/2"

21/2"

The 8-32 screws in an octagonal 4/0 box are permitted to support a luminaire provided the luminaire weight does not exceed ___ kg. Select one: a. 6 b. 9 c. 23 d. 3 e. 50

23

The distance required between the lightning rods and the pole bases that are installed at BCES is ___. Select one: a. 6' b. 12" c. 24" d. 8' Feedback The correct answer is: 24"

24"

On the BCES project, the trade size of the conduit(s) installed between the MSB and the disconnect switch for Chiller CH-2 is ___. Select one: a. 31/2 b. 4 c. 2 d. 3 e. 21/2

3

A certain piece of equipment is to be connected with SOO flexible cord. The equipment requires 2 ungrounded and 1 grounded conductors. What is the smallest AWG size cord that can be used to connect the equipment? All conductors should be counted as current carrying. The maximum load on any one conductor is 31 amps. The equipment will operate continuously. Select one: a. 7 b. 14 c. 12 d. 8 e. 10

33 X 1.25 = 38.75 or 39 amps 7 AWG cable The correct answer is: 7

As shown in Figure 208.44, you are to surface mount EMT between two equipment enclosures. You will make 15° offsets to get from each box to the wall surface. To avoid violating the NEC®, you can make ___º saddles.I. 221/2 II. 30 III. 45 Select one: a. I or II or III b. I or II only c. I only d. none of these

360 - (15 + 15) - (15 + 15) - 90 - 90 = 120 120 ÷ 6 = 20 degree saddles - maximum The correct answer is: none of these

You are to surface mount EMT on a wall between two boxes as shown in Figure 208.45. You will make 30° offsets to get from each box to the wall surface. You have to saddle over the obstacles shown. At most, you could make ___ degree saddles for the "quickest" bends.Remember: the NEC® limits the number of bends in a conduit run.I. 30 II. 45 III. 60 Select one: a. I or II only b. I only c. I or II or III d. none of these

360 - (30 + 30) - (30 + 30) = 240 240 ÷ 6 = 40 degree saddles - maximum 30º saddles The correct answer is: I only

Wiremold® surface metal raceway is to be installed in a science lab. The raceway is 11/4" deep and 33/8" high. There will be 18 circuits installed. Each circuit is protected by a GFCI circuit breaker in the panelboard. 12 AWG THHN/THWN conductors will be installed in the raceway. The ambient temperature around the raceway is 80°F. The ampacity of each circuit conductor is ___ amps. Select one: a. 20 b. 15 c. 30 d. 13.5 e. 12

386.22: 1) raceway > 4 sq. in.2) GFCI bkrs 2 wires per ckt: > 30 CCCs must derate3) area x 20% = (1.25 x 3.375)(.2) = (4.21875)(.2)=.84375(0.0133) x 36 = .4788 in 2 OK for 3)2) requires derate 30 x 40% = 12 amps The correct answer is: 12

A 3Ø piece of equipment has a nameplate rating of 54 amps at 240 volts 3-phase. The equipment needs to be connected with STO flexible cord. The cord will contain 3 circuit conductors + a green insulated conductor. The smallest cord you can use is ___ AWG. Select one: a. 14 b. 10 c. 12 d. 8 e. 4

4

Refer to Figure 205.14. Load 1 is supplied from a 150-A circuit breaker with 1 AWG conductors. Load 2 is supplied from a 300-Amp breaker with 4/0 AWG conductors. Both loads are 3-ph, 3-wire. Where only one grounding conductor is installed in the conduit between the panel and the pull box, its minimum size is ___ AWG. Select one: a. 2 b. 6 c. 8 d. 4 e. 3

4

Scenario 205.2A 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.Refer to Scenario 205.2. The smallest EGC that can be run is a ___ AWG. Select one: a. 1 b. 1/0 c. 4 d. 3 e. 2

4

See Figure 206.1. The service panel is fed with four 3/0 AWG copper conductors. The smallest GEC that can be installed to building steel is a ___ AWG conductor. Select one: a. 1/0 b. 2 c. 3/0 d. 4 e. 6

4

You are to install FMC between two equipment enclosures. You don't know how many or what size wires will have to be pulled into the flex. If you install the largest flex available this is trade size ___. Select one: a. 1 b. 6 c. 5 d. 3 e. 4

4

A ceiling-mounted luminaire that weighs 5 pounds is permitted to be mounted to and supported by a ___. Select one: a. 4" Sq box with a single-gang plaster ring b. switch box c. 4/0 box d. any of these e. none of these

4/0 box

A string of 2' x 4' lay-in fluorescent luminaires is to be connected by "looping" the wiring method. Between luminaires, the raceway entries are 6' apart. The length of the cable (or raceway) from the box to the first luminaire is 7 feet. Figure 208.3 MC cable is the wiring method to be used above in Figure 208.3. The maximum distance permitted between support #5 and support #6 is ___ feet. Select one: a. 41/2 b. 10 c. 1 d. 3 e. 6 f. support not req'd

6

Refer to Figure 205.11. The 200-A safety switch contains 125-amp fuses. The raceways used between the switch and the 3Ø motor contain three 2 AWG conductors. The minimum size of the EGC between the safety switch and the motor is ___ AWG. Select one: a. 4 b. 6 c. 8 d. 2 e. 3

6

Refer to Figure 206.4, shown above. Panel LK is fed from the transformer with four 500 kcmil copper conductors. The minimum size GEC to the ground rod is ___ AWG. Select one: a. 5 b. 2 c. 3 d. 4 e. 6

6

See Figure 206.1. The service panel is fed with four 1 AWG copper conductors. The smallest GEC that can be installed to building steel is a ___ AWG conductor. Select one: a. 4 b. 1 c. 2 d. 6 e. 8

6

An 8" x 8" x 5' gutter is shown in Figure 208.61. The maximum number of 4/0 AWG THWN/THHN conductors that can be installed in the gutter is ___. Select one: a. 4 b. 39 c. 8 d. 24 e. 25 f. 30 Feedback 8 x 8 = 64 64 x .20 = 12.8 sq. in. Table 5: 4/0 AWG = .3235 sq. in.12.8/.3235 = 39.567 39 conductors The correct answer is: 39

8 x 8 = 64 64 x .20 = 12.8 sq. in. Table 5: 4/0 AWG = .3235 sq. in.12.8/.3235 = 39.567 39 conductors The correct answer is: 39

Any branch circuit conductor located within ___" of a ballast, within a ballast compartment, shall have an insulation rating not lower than 90ºC. Select one: a. 3 b. 2 c. 6 d. 12 e. none of these

: 3

The NEC® states that contact of dissimilar metals be avoided where practicable. The Code reference that specifically permits steel threaded rigid couplings to be used with aluminum rigid metal conduit is ___. Select one: a. 358.12(6) b. 110.4 c. 344.14 d. 342.14 e. all of these

: 344.14

Refer to Figure 205.8, shown above. Where not subject to physical abuse, the smallest permitted GEC to the ground rod from Panel LC is ___ AWG. Panel LC has a 400 amp main breaker and is supplied power by the transformer with a set of 600 kcmil conductors. Select one: a. 1/0 b. 3 c. 2 d. 1 e. 6

: 6

Refer to Figure 208.14, shown above. The flexible wiring method between the time clock and the panel is permitted to be ___.I. 1/2" LFNC II. 3/8" LFMC III. 3/8" FMC Select one: a. I, II, or III b. I only c. II or III only d. III only e. I or II only f. I or III only

: I only

4 AWG conductors can be spliced inside an LB type conduit body using ___.I. crimp connectors II. screw-type splice connectors III. wire nuts Select one: a. I or II only b. III only c. I or II or III d. I only e. neither I nor II nor III

: I or II or III

Where installed through wooden studs as shown above in Figure 207.9, which of the installations is permitted by the NEC®? Select one: a. II only b. I & III only c. III only d. I, II & III e. II & III only

: II & III only

A section of 3/4-inch flex is used to feed power into the 1900 box and will be connected to one of the connectors shown below. The box will be mounted behind a sheetrock wall with a 2-gang plaster ring. Two duplex receptacles will be mounted on the box assembly. The NEC® permits ___ to be used.I. the 90º flex connector II. the straight flex connector Select one: a. I only b. II only c. either I or II d. neither I nor II

: II only

Refer to Figure 207.10, shown above. Conduit X contains 8 AWG, Conduit Y contains 6 AWG, and Conduit Z contains 4 AWG conductors. Although bushings have been installed on all the conduits, which of the conduits actually are required to have bushings per the NEC®? I. Conduit X II. Conduit Y III. Conduit Z Select one: a. II & III only b. III only c. I & II only d. I, II & III e. none of these

: III only

Six-foot lighting "tails" made from 3/8-inch FMC are used to connect recessed luminaires ("can lights") above a lay-in grid ceiling. The space between the ceiling and the roof deck is used as an air return for the air-conditioning/heating system. In this plenum ceiling space, is the use of lighting tails made of FMC a violation of the NEC®?

: No

Refer to the BCES food service drawings. A 20 Qt mixer (Item 6) requires power. The power for this equipment is provided by ___. Select one: a. cord-and-plug connection to a wall-mounted duplex receptacle b. cord-and-plug connection to a floor-mounted duplex receptacle c. flex connection to a stubbed-up conduit d. direct connection to a stubbed-up conduit

: cord-and-plug connection to a floor-mounted duplex receptacle

The plans indicate that you should install a 200-Amp branch circuit in Schedule 40 PVC with a 6 AWG equipment grounding conductor. However you did not have any 6 AWG wire so you pulled in 12 AWG instead. Compared to the correct circuit (with the 6 AWG EGC) your circuit will take ___ time for the circuit breaker to open when a ground fault occurs. Select one: a. the same amount of b. less c. more

: more

In commercial repair garages where electrical diagnostic equipment, electrical hand tools, or portable lighting equipment is used, GFCI protection is required for all ___ receptacles.I. 125-volt, single-phase, 15- and 20-ampereII. 250-volt, single-phase, 30-ampereIII. 250-volt, three-phase, 15- and 20-ampere Select one: a. II only b. I, II, & III c. I only d. I & II only e. I & III only

:2020 NEC: 511.12 I, II, & III

Refer to Figure 211.6. After removing the receptacle from its package, you are going to check it with an ohmmeter. If the leads of the ohmmeter are placed between Points D and G, the meter should indicate ___ ohms. Select one: a. b. 0

A infinente

Refer to Figure 208.12, shown above. You will need at least ___ straps to support the conduit between enclosures A & B. Trade size 2 IMC with threaded couplings and connectors is used. You will cut and thread the conduit as required. The distance from enclosure A to B is 123 feet. Select one: a. 10 b. 11 c. 12 d. 9 e. 14

A to B requires 9 with 16' spacing The correct answer is: 9

Where 6 AWG/7-conductor Type G flexible cable (90° rated cable) is used to supply fastened-in-place utilization equipment, it has an ampacity of ___ amps. This equipment has a metal enclosure. Select one: a. 36 b. 54 c. 45 d. 70 e. 62

Column F - 90° Table: 87 A * 80% = 69.6 ampsThis question states that the equipment has a metal enclosure, one of those conductors must be used as an equipment grounding conductor. Therefore, the deration should be based on 6 current carrying conductors, not 7. This would change the percentage from 70% to 80% (4-6 conductors = 80%) The correct answer is: 70

Compared to Schedule 80, Schedule 40 PVC ___.I. has a thinner wall thicknessII. can be used where subject to physical damageIII. has a larger cross-sectional area for fill purposes Select one: a. II only b. II & III only c. I, II, & III d. I & III only e. III only

I & III only

Grounding electrodes made of galvanized RMC (Rigid Metal Conduit) shall ___. I. be at least 3/4 inch in diameterII. be at least 10 feet in lengthIII. not be permitted Select one: a. II only b. III only c. I only d. I & II only e. none of these

I only

The primary purpose of bonding metal equipment enclosures, metal raceways, and the grounded power supply together is to ___.I. cause the quick operation of OCPDsII. keep all metal parts at the same voltageIII. limit voltage surges Select one: a. I, II & III b. I & III only c. II & III only d. I only e. I & II only

I only

The primary purpose of bonding metal equipment enclosures, metal raceways, and the grounded power supply together is to ___.I. cause the quick operation of OCPDsII. keep all metal parts at the same voltageIII. limit voltage surges Select one: a. II & III only b. I & II only c. I only d. I & III only e. I, II & III

I only

Bushings have been installed on all the conduits entering the box shown above in Figure 207.10. Where Conduit X contains 4 AWG, Conduit Y contains 2/0 AWG, and Conduit Z contains 1 AWG conductors, the NEC® requires ___ to have a bushing.I. Conduit X II. Conduit Y III. Conduit Z Select one: a. I & II only b. I only c. II & III only d. I, II & III e. none of these

I, II & III

The conduit body shown above at ___ in Figure 208.18 is a Type X. Select one: a. II b. IV c. III d. I e. none of these

II

The primary purpose of grounding metal equipment enclosures and metal raceways to the grounding electrode system (earth) is to ___.I. cause the quick operation of OCPDsII. keep all metal parts at the same voltageIII. limit voltage surges Select one: a. I only b. I, II & III c. I & III only d. I & II only e. II & III only

II & III only

Which of the following is an example of a raceway?I. AC cable II. LFMC III. RMC Select one: a. II & III only b. I & III only c. I, II, & III d. III only e. I only

II & III only

The power to the fan, shown below, is to be supplied from a 4/0 box that is not listed for fan support. The installation options are: I. Using a 1/2" threaded rod suspended vertically from the building structure, securely attach the 4/0 box to the rod using hex nuts. Then directly connect the fan to the 4/0 box using 8-32 machine screws. II. Suspend two parallel 1/4" threaded rods vertically from the building structure so that these pass through the 4/0 box and extend below the ceiling finish. Attach the 4/0 box to these rods with hex nuts. Attach the canopy, with hex nuts, to the rods that extend below the ceiling. Which installation option, shown above, satisfies the requirements of 314.27(C) in the NEC®?

II only

Which of the following raceways are permitted to be installed in pole bases on BCES?I. Schedule 80 PVC II. RMC III. IMC Select one: a. II only b. I & II only c. I, II & III d. I only e. II & III only

II only

A 4 square box (1900) with a 1-gang plaster ring is to be flush mounted behind a sheetrock wall for a receptacle. 1/2" FMC will be installed in the wall and connected to the box. Does the NEC® permit a 90° flex connector to be used at the box? Select one: a. Yes b. No

No

A customer wants to install 120-volt track lighting on the wall 2 feet above a countertop. The top of the countertop is 32 inches AFF. Does the NEC® permit this installation? Select one: a. Yes b. No

No

If branch circuits from a 120/240 volt 1Ø, 3-wire panelboard are run in the same conduit as circuits from a 277/480 volt 3Ø, 4-wire panel, is this a Code violation? Select one: a. Yes b. No

No

Luminaires are installed outdoors under an open porch of a one-family dwelling. The luminaires are marked "Suitable for Wet Locations." Does this violate the provisions of Article 410 of the NEC®? Select one: a. Yes b. No

No

What type raceway for the BCES service feeder conductors is installed between the pad-mount transformer and the Texas New Mexico power distribution pole? Select one: a. RMC b. cable tray c. EMT d. PVC e. IMC

PVC

___ persons shall be used to perform any work on live or energized equipment. Select one: a. Authorized b. Special c. Qualified d. Quality

Qualified

Only the AØ tap and feeder conductors are shown connected to the distribution block. BØ and CØ taps are run from the block into each switch and panelboard. Additionally, neutral taps will be run to the panels, and to the switches, where required.What is the smallest metal wireway that can be used for the service "gutter" shown in Figure 208.64? The 3Ø, 4-W feeder consists of eight 600 kcmil conductors. The following taps will be made in the distribution block:Panel LA: four each 3/0 AWG Switch 1: three each 500 kcmilPanel LB: eight each 4/0 AWG Switch 2: four each 1/0 AWG(4 in ea conduit) Switch 3: three each 3/0 AWGSwitch 4: four each 2/0 AWG Select one: a. 6 x 6 b. 8 x 8 c. 10 x 10 d. 12 x 12 e. none of these - this is a Code violation

The correct answer is: 10 x 10

You are installing a GEC to the main water line from a 200-A, main breaker Panel LC, ___ AWG is the largest size copper wire required. As shown in Figure 205.8, the panel is fed from a transformer with one set of 3/0 AWG wire. Select one: a. 2 b. 3 c. 1/0 d. 4 e. 3/0

The correct answer is: 4

The maximum length of a flexible cord used to connect data-processing equipment to a branch circuit outlet box is ___. Select one: a. 3.0 m b. 6 feet c. 10 feet d. 4.5 meters e. 3.15 m

The correct answer is: 4.5 meters

Which of the flexible cords or cables listed below can be used in dry locations? Select one: a. HSJO b. EV c. PD d. any of these e. none of these

The correct answer is: any of these

On the BCES project, the electrician is required to provide a bonding jumper on the horizontal cable tray ___. Select one: a. where accessible b. between horizontal and vertical runs c. between each section

The correct answer is: between each section

A 3-gang masonry box is shown in Figure 107.458. It will have three PVC conduits connected to it. An equipment grounding conductor will be pulled into each PVC. The box will contain three 4-way switches. Twelve "travelers" are pulled into the box along with two other circuit conductors. All conductors are 12 AWG copper THHN/THWN. The box must have a minimum volume of ___ in3. Select one: a. 45 b. 38.25 c. 47.25 d. 36 e. 40.5

[14 CCCs] + [3 X 2 for devices] + [1 for EGC] = 21 each 12 AWGs21 X 2.25 in 3 = 47.25 in 3 The correct answer is: 47.25

The deep masonry box, shown above in Figure 208.39, will contain three 4-way switches, one single-pole switch, and one three-way switch. Conduits #1 and #4 each contain four 10 AWG wires that are spliced in the box. Conduit #2 contains twelve wires and conduit #3 contains five wires. Additionally, each conduit contains a ground that equals the size of the circuit conductors in that conduit. The conductors in conduits #2 and #3 are 12 AWG and are terminated on the switches. Will this installation violate the Code? Select one: a. Yes b. No

[17 X 2.25] + [2 X 5 X 2.25] + [8 X 2.5] + [1 X 2.5] = 83.255-gang deep box = 5(21.0) = 105 OK! The correct answer is: No

Refer to Figure 208.34. The smallest (volume) junction box that can be used in the installation shown below is a ___. Conduits #1 and #4 each contain twenty-four 10 AWG wires. Conduits #2 and #5 each contain nine 6 AWG wires. Conduits #3 and #6 each contain sixteen 8 AWG wires. Conduits #7, #10, #9, and #12 each contain twenty-eight 12 AWG wires. Conduits #8 and #11 each contain six 8 AWG wires. All conductors are "wire nutted" inside the box. Select one: a. 12" x 12" x 6" deep b. 10" x 10" x 8" deep c. 10" x 10" x 6" deep d. 12" x 12" x 4" deep

[2 X 24 X 2.5] + [2 X 9 X 5.0] + [2 X 16 X 3.0] +[4 X 28 X 2.25] + [2 X 6 X 3.0] =120 + 90 + 96 + 252 + 36 = 594 cu. in. The correct answer is: 10" x 10" x 6" deep

A switch box is fed with 12-2 MC. FMC ("flex") feeds an H/V/L/NL from the switch box and contains 1 "hot," 3 "switch-legs" and 1 neutral. A 2-gang, 21/2-inch-deep masonry box will be used and will contain the two "dougle or stack switches" shown in Figure 124.104. Will this violate the NEC®? Remember: A "dougle or stack" switch is two, single-pole switches that are mounted on one yoke (mounting strap). Select one: a. Yes b. No

[2 dev X 2] + [7 CCCs] + [1 EGC] = 12 each #12s 12 X 2.25 = 27 in 3 masonry box volume = 14 in 3 X 2 = 28 in 3 OK The correct answer is: No

The calculated minimum height (top-to-bottom) of the pull box shown in Figure 208.53 is ___ inches. The conduits considered for this calculation contain conductors that enter this side and exit the adjacent side. Select one: a. 32 b. 30 c. 37 d. 33 e. 40

[5" X 6] + 3" = 33" The correct answer is: 33

The minimum CALCULATED dimension for "height" shown in Figure 208.54 is ___ inches. All conductors enter the left side of the pull box and exit the bottom. Select one: a. 42 b. 34 c. 24 d. 32 e. 44

[6" X 6] + 4" + 4" = 44" The correct answer is: 44

Examples of raceways would include ___. Select one: a. LFMC b. Schedule 40 PVC c. Wiremold® wall mold d. EMT e. all of these

all of these

PPE is required for head, face, neck, ___, hands, arms, feet and legs. Select one: a. chin b. eyes c. body d. all of these

all of these

Thirty feet of 3/8 inch rebar used to reinforce grade beams within a poured building slab ___ permitted to be used as a grounding electrode for a separately derived system or a service. Select one: a. is b. is not

is not

Employees must be informed of any operations in their work area where hazardous chemicals are present, and the ___ and availability of the written Haz Com program, including the required list(s) of hazardous chemicals and MSDS sheets. Select one: a. purpose b. location c. cost d. none of these

location

A(n) ___ is a complete lighting unit consisting of a light source such as a lamp or lamps, together with the parts designed to position the light source and connect it to the power supply. Select one: a. lighting outlet b. lighting fixture c. assembly d. luminaire e. none of these

luminaire

Employee training shall include the ___ and observations that may be used to detect the presence or release of a hazardous chemical in the work area. Select one: a. methods b. type c. information d. all of these

methods

A PAR lampholder is installed in a 1-gang weatherproof "bell" box. This box is permitted to be supported by RMC and threadless connectors where ___.I. no more than 18" of RMC is stubbed out of the ground and enters the boxII. at least two RMCs are stubbed up out of the ground into the bottom of the box Select one: a. I only b. II only c. both I & II d. neither I nor II

neither I nor II

A steel plate is required to protect ___ where it is installed through wooden framing members. A 1 inch clearance from the edge of the framing member can NOT be maintained.I. EMT II. Schedule 40 PVC III. RMC Select one: a. I & II only b. I only c. II only d. I, II & III e. neither I nor II nor II

neither I nor II nor II

Under which conditions, listed below, does the NEC® permit one conduit to be supported from another as shown above in Figure 207.11? Both conduits contain current-carrying conductors.I. Where the upper conduit trade size is at least twice (200%) the trade size of the lower conduit.II. Where the upper conduit contains a feeder and the lower conduit contains only branch circuits.III. Where the upper conduit is RMC, the lower conduit is EMT, and the threaded rod is at least 3/8 inch in size. Select one: a. I or II only b. I only c. II or III only d. III only e. neither I nor II nor III

neither I nor II nor III

Three 4/0 AWG conductors are installed in the flex between the breaker enclosure, containing a 500-A breaker, and the motor. The smallest EGC that can be installed in the flex shown in Figure 205.15 is ___. Select one: a. 2/0 AWG b. 4/0 AWG c. 1 AWG d. 3 AWG e. none of these

none of these

When couplings and connectors are properly tightened in a run of conduit, this will ___ the amount of time required for a circuit breaker to open when a short-circuit occurs. Select one: a. decrease b. not affect c. increase

not affect

Figure 208.46 shows a run of EMT between two enclosures with 10° offsets made into each enclosure. Over the obstructions, 20° 3-point saddles and 15° 4-point saddles are made. A total of ___° of bends are made in the run of EMT. Select one: a. 340 b. 270 c. 320 d. 300 e. none of these

offset + 3-pt + 4-pt + 3-pt + 90 + 90 + offset =(10 + 10) + (10 + 20 + 10) + (15 + 15 + 15 + 15) + (10 + 20 + 10) + 90 + 90 + (10 + 10) = 360° The correct answer is: none of these

On the BCES project, ___ conduit(s) is/are installed between the transformer and Panel LB2. Select one: a. three b. seven c. one d. two

one

Providing a low impedance ground return path ___ when a ground-fault occurs. Select one: a. has no effect on the circuit current b. permits a high current to flow c. limits the amount of current to a small amount

permits a high current to flow

Your only available grounding electrode is the metal underground water pipe from the water utility. You are required by the NEC® to have one other grounding electrode for your service. Which of the following driven electrodes could you use? Select one: a. 10 ft of trade size 1 rigid metal conduit b. 8' by 1/2 inch copper-clad ground rod c. either a or b d. neither a nor b

10 ft of trade size 1 rigid metal conduit

See Figure 205.7. What is the smallest size wire permitted to be used as a main bonding jumper in a panel with a 175-A Main Breaker? The service entrance conductors are 2/0 AWG. Select one: a. 4 AWG b. 3 AWG c. 6 AWG d. 1 AWG e. 2 AWG

2/0 AWG is the largest ungrounded conductor in conduit 4 AWG The correct answer is: 4 AWG

Each circuit, leading to or through motor-fuel-dispensing equipment for remote pumping systems, shall be provided with a disconnecting means that will simultaneously disconnect all conductors of the circuits, including the grounded conductor. ___ are not permitted for such required disconnecting means. Select one: a. Single-pole breakers utilizing handle ties b. Double-throw switches c. Emergency stop buttons d. Two-pole breakers

2020 NEC: 514.11(A) The correct answer is: Single-pole breakers utilizing handle ties

Refer to Figure 206.4, shown above. Panel LK is fed from the transformer. The transformer is fed with four 4/0 AWG conductors. The minimum size GEC to a concrete-encased electrode is ___ AWG. Select one: a. 6 b. 4 c. 8 d. 3 e. 2

4

The smallest size copper wire permitted to be used as a main bonding jumper in a 200-A main breaker panelboard is ___ AWG. The panel is fed from a transformer with one set of 3/0 AWG wire. Select one: a. 3/0 b. 1/0 c. 3 d. 2 e. 4

4

For a 225-amp service where 4/0 AWG service entrance conductors are installed, the smallest main bonding jumper permitted is ___ AWG. Select one: a. 1/0 b. 2 c. 6 d. 3 e. 4

4/0 2 AWG The correct answer is: 2

What is the smallest size copper wire permitted to be used as a main bonding jumper in a 400-A main breaker panelboard? The panel is fed from a transformer to a single conduit containing four 500kcmil conductors. Select one: a. 2/0 AWG b. 2 AWG c. 3/0 AWG d. 1 AWG e. 1/0 AWG

500 kcmil is the largest ungrounded conductor in conduit 1/0 AWG The correct answer is: 1/0 AWG

Where a 250 kcmil copper GEC is subject to physical damage, it ___. Select one: a. can be run inside properly supported RMC b. can be run exposed if properly supported c. either a or b d. neither a nor b

The correct answer is: can be run inside properly supported RMC

Your only available grounding electrode is the metal underground water pipe from the water utility. You are required by the NEC® to have one other grounding electrode for your service. Which of the following driven electrodes could you use? Select one: a. 10' by 5/8 inch copper-clad ground rod b. 8 ft of trade size 3/4 rigid metal conduit c. either a or b d. neither a nor b

The correct answer is: either a or b

Refer to the BCES prints. The concrete-encased electrode needs to be installed early in the construction process, before walls have been built or the floor slab poured. The most practical place to install the concrete-encased electrode would be the ___. Select one: a. South footer in room D156 b. West footer in room D154 c. East footer in room D154 d. West footer in room D133

The main switchboard sits against the east wall of room 154. The correct answer is: East footer in room D154

A metal enclosure surrounding electrically operated equipment ___. Select one: a. is required to be grounded b. protects the equipment from physical damage c. provides protection for people against accidental contact with live parts d. all of these

all of these

At each workplace, employers shall ___ a written hazard communication program. Select one: a. maintain b. develop c. implement d. all of these

all of these

The chemical distributor, manufacturer, or importer shall ensure that each container of hazardous chemical leaving the workplace has the identity of the hazardous chemical. Select one: a. tagged b. marked c. labeled d. any of these

any of these

Personal Protective Equipment shall be worn as ___ for the risks involved. Select one: a. specified b. appropriate c. necessary d. all of these

appropriate

The purpose of the Haz Com standard is to ensure that the hazards of all chemicals are ___, and that information concerning their hazards is transmitted to employees. Select one: a. evaluated b. labeled c. marked d. identifie

evaluated

The purpose of the Haz Com standard is to ensure that the hazards of all chemicals are ___, and that information concerning their hazards is transmitted to employees. Select one: a. labeled b. marked c. evaluated d. identified

evaluated

The circuit installed in a run of PVC conduit requires a 6 AWG equipment grounding conductor. However, a 12 AWG was installed instead. Using the 12 instead of the 6 AWG wire will ___ the amount of time required for a circuit breaker to open when a ground fault occurs. Select one: a. increase b. decrease c. have no effect on

increase

On the BCES project at the parking lot light pole base, the connection made between the ground wire and ground rod is permitted to be a ___ type. Select one: a. split-bolt b. ground rod clamp (acorn) c. thermoweld (cadweld) d. mechanical crimp e. any of these is acceptable

thermoweld (cadweld)

Safety data sheets must be readily accessible when employees are in their ___. Select one: a. break area b. work area c. work vehicle d. none of these

work area

Written Energized Electrical ___ are required if live parts can not be put in an electrically safe condition. Select one: a. job requests b. work orders c. work permits d. none of these

work permits

Refer to Figure 205.10. The 400-A safety switch contains 350-amp fuses. The raceways used between the switch and the 3Ø motor contain three 250 kcmil conductors. The minimum size of the EGC between the safety switch and the motor is ___ AWG. Select one: a. 1 b. 6 c. 2 d. 4 e. 3

e. 3

The primary purpose of grounding metal equipment enclosures and metal raceways to the grounding electrode system (earth) is to ___. I. cause the quick operation of OCPDs II.keep all metal parts at the same voltage III. limit voltage surges

e. II & III only

Ground rods made of aluminum RMC ___. I. shall be at least 5/8 inch in diameter II. shall be at least 10 feet in length Select one: a. I only b. II only c. both I & II d. neither I nor II e. shall not be permitted

The correct answers are: neither I nor II, shall not be permitted

All conductors of circuits are required to be ___ on circuits leading to or through dispensing or remote pumping equipment. Select one: a. independently disconnected b. simultaneously disconnected c. bonded d. rated 20 ampere, 250 volt e. locked out

2020 NEC: 514.11(A) The correct answer is: simultaneously disconnected

Motor fuel dispensing areas for dispensing gasoline are classified as ___ locations. Select one: a. Class II, Division 1 b. Class I, Division 1 c. Class I, Division 2 d. Class II, Division 2 e. Class III, Division 1

2020 NEC: 514.3(B)(1) | 2020 NEC: 514.3(B)(1) (Table) The correct answer is: Class I, Division 2