Virginia Electrician Quiz 23

Question 1 of 25

1. Question

Which of the following cable types is an acceptable substitute for a Type CL3R cable?

CL2

CL2X

CL2R

None of the above

Question 2 of 25

2. Question

Where a dc system consists of a 3-wire balancer set with overcurrent protection, the grounding electrode conductor shall not be smaller than _____________.

6 AWG copper

4 AWG copper

1/0 AWG copper

the neutral conductor

Question 3 of 25

3. Question

Fixed ladders in a manhole intended for personnel entry shall _______________.

have rungs installed with a maximum spacing of 12 in.

be corrosion resistant

be covered with a slip resistant material

have a width of not less than 22 in.

Question 4 of 25

4. Question

Type NMC cable is not allowed to be used in which of the following applications?

In wet locations.

In outside walls of masonry block.

In a motion picture studio.

In a shallow chase in masonry.

Question 5 of 25

5. Question

How many 15 ampere branch circuits are required for the lighting of a 16 ft. x 70 ft. mobile home?

2

3

4

5

Question 6 of 25

6. Question

Which of the following statements is/are true regarding wind electric systems?
I. A surge protective device is not required to be installed between a small wind electric system and any loads served by the premises electrical system.
II. Wind turbine output circuits connected to one- and two-family dwellings shall be permitted to have a maximum voltage up to 600 volts.

I only

II only

Both I and II

Neither I nor II

Question 7 of 25

7. Question

The perimeter surface of a permanently installed swimming pool, required to be bonded to the equipotential bonding grid, shall be considered to extend ________ horizontally beyond the inside walls of the pool.

1 ft.

2 ft.

3 ft.

4 ft.

Question 8 of 25

8. Question

What is the allowable ampacity of each conductor where 12 current-carrying, 3/0 AWG, THW, copper conductors are installed in a raceway?

100 amperes

160 amperes

165 amperes

200 amperes

Question 9 of 25

9. Question

In every bedroom of a dwelling unit, receptacle outlets shall be installed so that no point measured horizontally along the floor line of any wall space is more than _____________ from a receptacle outlet.

3 ft.

6 ft.

9 ft.

12 ft.

Question 10 of 25

10. Question

The 2017 National Electrical Code refers to the intermittent operation of equipment in which the load conditions are regularly recurrent as __________________.

continuous duty

intermittent duty

periodic duty

varying duty

Question 11 of 25

11. Question

Exposed live parts of motors and controllers operating at __________ or more between terminals shall be guarded against accidental contact.

30 volts

50 volts

70 volts

120 volts

Question 12 of 25

12. Question

The momentary rating of X-ray equipment is a rating based on an operating interval that does not exceed ___________.

15 seconds

10 seconds

7 seconds

5 seconds

Question 13 of 25

13. Question

A section of 1 in. liquidtight flexible metal conduit that is not over 6 ft. in length may be used as an equipment grounding conductor for circuits rated not over _____________.

60 amperes

50 amperes

30 amperes

20 amperes

Question 14 of 25

14. Question

A disconnecting means shall be provided within sight of and within __________ of the operator’s station of an amusement ride at a fair.

30 ft.

25 ft.

12 ft.

6 ft.

Question 15 of 25

15. Question

Plate type grounding electrodes shall expose not less than ____________ of surface to exterior soil.

1 ft.²

2 ft.²

3 ft.²

4 ft.²

Question 16 of 25

16. Question

Where electrical switchgear operates at a nominal voltage to ground of 7,200 volts, the depth of the working space in the direction of live parts shall not be less than _______________ if a concrete wall is located on the other side of the working space.

3 ft.

4 ft.

5 ft.

6 ft.

Question 17 of 25

17. Question

Type PVC conduit is allowed within Class I, Division 1 hazardous locations when encased in a concrete envelope a minimum of 2 in. thick and provided with not less than ________ of cover measured from the top of the conduit to grade.

36 in.

24 in.

18 in.

12 in.

Question 18 of 25

18. Question

Raceways shall be used only as a means of support for other raceways, cables, or nonelectrical equipment where ______________.

the raceway is identified as a means of support

the raceway contains power supply conductors for electrically controlled equipment and is used to support Class 2 circuit cables that are solely for the purpose of connection to the equipment control circuits.

the raceway is used to support boxes in accordance with N.E.C. section 314.23

All of the above

Question 19 of 25

19. Question

Which of the following service conductors would be considered outside of a building where installed _______________.

within PVC conduit and under not less than 18 in. of earth beneath a building

under 1 in. of concrete beneath a building

within rigid metal conduit and routed through a wall of a building

All of the above

Question 20 of 25

20. Question

What is the full-load current of a 1-phase, 230 volt, 5 hp motor?

13.2 amperes

15.2 amperes

28 amperes

56 amperes

Question 21 of 25

21. Question

When a 150 ampere rated feeder carries the entire load associated with a dwelling unit, the conductors shall be permitted to have an ampacity rating of not less than _________ of the rating of the feeder.

125%

100%

83%

78%

Question 22 of 25

22. Question

The ampacity of the conductors from the generator terminals to the first distribution device containing overcurrent protection shall not be less than ________ of the nameplate current rating of the generator.

100%

115%

125%

140%

Question 23 of 25

23. Question

A building or other structure shall be supplied by only one service unless the additional service supplies _______________.

optional standby systems

a service disconnecting means rated over 600 amperes

equipment necessary for a manufacturing process

All of the above

Question 24 of 25

24. Question

Derating factors are not required to be applied for conductors installed in sheet metallic auxiliary gutters where the number of current-carrying conductors is _______ or less.

3

10

20

30

Question 25 of 25

25. Question

In general applications, Class 3 conductors must be separated by at least _________ from power conductors.

¼ in.

½ in.

1 in.

2 in.