Bell Midterm

For specifications written using the 2004 MasterFormat™, Division ___ pertains to electrical. Select one: a. 26 b. 17 c. 6 d. 14 e. 16

A

Generally, ___ engineers are responsible for developing plans and specs for dirt work and storm drainage on a project. Select one: a. civil b. MEP c. structural

A

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

B

A concrete-encased electrode is effective because ___.I. concrete retains moistureII. concrete provides a large contact area with the earth and the building weightmaintains contact between concrete and earth Select one: a. I only b. II only c. both I and II d. neither I nor II

C

A three-phase, four-wire, wye-connected system is normally ___ grounded. Select one: a. corner b. not c. center (at the point where the common leads of each transformer are connected together) d. delta

C

BCES Drawing C2.4 (Storm Water PPP Details) contains details intended to prevent ___. Select one: a. soil erosion b. trespassing c. pollution d. flooding e. all of these

C

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. decrease b. remain the same c. increase

C

Structural drawings provide information required to assemble the structural components to erect the building or structure, from the ground up. These components include ___. Select one: a. footings b. slabs c. both a and b d. neither a nor b

C

Table 250.66 permits an aluminum grounding electrode conductor to be used with ___ service-entrance conductors. Select one: a. copper b. aluminum c. either a or b

C

The ground clamp, for attachment to an aluminum grounding electrode conductor, is not permitted to be located within ___" of the earth. Select one: a. 30 b. 36 c. 18 d. 24

C

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

C

_ are required to be installed on ungrounded 3Ø, 3-wire systems. Select one: a. Ground detectives b. Ground defectors c. Ground detectors d. none of these

C

Article 250, Part III contains Table ___ for sizing the grounding electrode conductor. Select one: a. 250.102(c)(1) b. 250.122 c. 250.11 d. 250.66

D

Information included on the survey plan is utilized by ___. Select one: a. engineers b. architects c. electricians d. all of these

D

It is important for the electrician to have a working knowledge of the structural foundation plans and details when laying out his underground electrical installation to avoid ___. Select one: a. footings b. grade beams c. piers d. all of these

D

On the BCES project, connections to motor leads are permitted to be made using ___. Select one: a. wire nuts b. compression-type butt splice connectors c. split-bolt connectors d. none of these

D

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. II or III only c. I, II & III d. III only e. I only f. I or III only

E

During lightning strikes, electrons seek to return to ___.

ground (earth)

Total opposition to current flow in an alternating current (ac) circuit is ___.

impedance

A(n) ___ conductor carries circuit current in normal operation.

neutral

Resistance to earth is also commonly known as resistivity. T/F

true

High-impedance grounded neutral systems require the installation of ground detectors. Select one: a. True b. False

A

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

A

Normally, a grounded circuit conductor shall be identified as white or gray. Select one: a. True b. False

A

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

A

When a GEC is installed in a metal conduit, the GEC is connected in ___ with the conduit. Select one: a. parallel b. series

A

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

A

Which of the following Code Sections requires the non-current-carrying metal parts of the service equipment to be bonded together? Select one: a. 250.92(A) b. 250.112 c. 250.66 d. 250.4(B)(1)

A

If a ground fault occurs, the branch circuit OCPD will open most quickly when ___. Select one: a. a ground rod is driven at the load and bonded to the metal load enclosure b. the branch circuit is installed in EMT and a separate EGC has been pulled c. the branch circuit is installed in EMT as the only EGC

B

Isolated ground receptacles are identified by a(n) ___. Select one: a. green dot b. orange triangle c. red triangle d. red color

B

On a survey drawing, P.O.B. is an abbreviation for ___. Select one: a. Point of Bearing b. Point of Beginning c. Plan Oblique Building d. Plat Offset Benchmark e. Partition of Bricks f. Property Outline Base

B

Specifications are presented in a standard format developed by ___. Select one: a. Standard Industry Practices b. Construction Specifications Institute c. Standard Format Institute d. Specifications Format Association

B

Would it ever be permitted to install a 3/0 grounding electrode conductor where the main bonding jumper was sized at 250 kcmil? Select one: a. Yes b. No

A

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. II & III only b. I & II only c. II only d. I & III only e. I only f. none of these

B

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

B

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

B

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

B

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. isolation transformers c. double insulation d. metallic shielding

B

GFCI protection for personnel ___ protect a person against the sensation of feeling a shock. Select one: a. does b. does not

B

The size of bonding jumpers on the line or supply side of service equipment is based on the size of the ___. Select one: a. rating of the overcurrent device b. supply conductor

B

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.

B

___ are not permitted to be grounded. Select one: a. Separately derived systems b. Circuits for electric cranes operating over combustible fibers c. Alternating-current systems of 1 kV and over d. None of these - they are all required to be grounded

B

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 panel b. the transformer c. either the transformer or the panel d. both the transformer and the panel

C

___ was the structural engineering company utilized on BCES. Select one: a. Bay Architects b. Brooks & Sparks c. Schmitz/Lamb d. Carter-Burgess

C

Section 250.96(B) permits equipment to be ___ in order to minimize electromagnetic interference (often called "noise"). Select one: a. shielded b. specially grounded c. sheathed d. isolated

D

Which of the following could be used as the GEC from the service equipment to building steel?I. THHN/THWN aluminumII. THHN/THWN copperIII. bare copper Select one: a. II only b. I only c. II & III only d. I, II & III e. III only

D

hich of the following statements does NOT describe objectionable current? Select one: a. Neutral current flowing over metal conduit b. Neutral current flowing over cable shields c. Neutral current flowing over the equipment grounding conductor d. Neutral current flowing over the neutral conductor

D

A site plan is used to ___. Select one: a. locate lot lines b. establish elevations c. establish finish grade d. place the building e. all of these f. none of these

E

To maintain the structural integrity of a building, ___ is a consideration used in the design process. Select one: a. earthquake potential b. soil conditions under the building c. flood potential d. wind speed potential e. all of these

E

A benchmark is typically placed by a(n) ___ firm.I. government agency II. private survey III. earth moving Select one: a. II only b. I only c. II or III only d. III only e. I or II or III f. I or II only

F

Electrical faults cause all the following types of stresses, except ___.

seismic