2023 Master Electrician Exam Quiz

1. 
What is the allowable ampacity of three (3) current-carrying conductors, size 500 kcmil 75° C rated copper, encased in intermediate metal conduit (IMC) located less than 7/8 inches above a rooftop and exposed to direct sunlight with an expected ambient temperature of 86° F?

2. 
GFCI protection must be provided in dwelling units, where 125-volt, single-phase receptacle outlets are installed within what distance from the outer edge of a sink?

3. 
When applying the standard method of calculation for dwelling units, if a branch circuit supplies a 7 kW counter-mounted cooktop and a 5 kW wall-mounted oven in a residence, what will the demand factor be on an ungrounded service-entrance and feeder conductor?

4. 
Where a cable-or raceway-type wiring method is installed parallel to framing members, such as joists, rafters, or studs, or is installed parallel to furring strips, it shall be installed and supported so that the nearest outside surface is not less than 32 mm (1-1/4 in.) from the nearest edge of the framing member or furring strips where nails or screws are likely to penetrate. (Exceptions ignored).

5. 
For a 50-ampere branch circuit with conductors installed in PVC conduit, what is the minimum size copper equipment grounding conductor?

6. 
For a building supplied by a single service, what is the maximum number of service disconnects permitted?

7. 
What is the maximum conduit fill percentage allowed for more than 2 conductors in a raceway?

8. 
What is the minimum width of working space required for a panelboard?

9. 
A 100 A feeder is supplying a panel 150 ft away at 208 V, 3-phase. THHN copper conductors, 75°C rating. What is the recommended maximum voltage drop for efficiency?

10. 
A 4″ square box contains: Four #12 current-carrying conductors, One #12 equipment grounding conductor, One yoke-mounted duplex receptacle. What is the minimum required box volume?

11. 
For a 400 A service with 600 kcmil Cu service entrance conductors, what is the minimum GEC size?

12. 
The motor disconnecting means must be located:

13. 
For equipment 480 V-to-ground with exposed live parts on one side and grounded parts on the other, minimum working space depth is:

14. 
General lighting load for office areas shall be calculated at:

15. 
Which of the following describes a Class I, Division 1 location?

16. 
What is the minimum rating of the branch circuit required to supply a commercial electric sign or outline lighting system?

17. 
Which of the following is required for single-phase, 120V through 240V pump motors connected to permanently installed swimming pools?

18. 
What is the maximum system voltage permitted for underwater luminaires supplied by a listed low-voltage lighting system?

19. 
How many branches must the essential electrical system in a hospital have?

20. 
How many receptacles are required at each patient bed location in general care areas?

21. 
What is required for branch-circuit wiring serving patient care areas?

22. 
You need a branch-circuit conductor for a 40 A non-continuous load in EMT with 8 current-carrying conductors. Conductors are THHN copper (90 °C). Ambient temperature is 40 °C. What is the minimum conductor size required after applying adjustment and correction factors?

23. 
A feeder supplies a 200 A panelboard. What is the minimum copper equipment grounding conductor size required?

24. 
The disconnecting means for a 50 HP, three-phase, 460 V induction motor shall have a minimum ampere rating of:

25. 
What is the minimum receptacle rating permitted on a 20 A branch circuit that supplies two or more receptacles or outlets?

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