NCCER ELECTRICAL CERTIFICATION EXAM PRACTICE
QUESTIONS AND CORRECT ANSWERS LATEST 2025
1. Verifying the presence or absence of voltage should be
performed only by: Qualified individuals
2. The NEC recommends maintaining voltage within a 3%
drop. If a branch circuit operates at 240 volts AC, what is the
minimum circuit operating volt? 232
3. What is the name of the connecting device shown in the
diagram? split-bolt
4. The volt amperes in an AC circuit is the same as Apparent
power
5. What is the voltage drop for a #8 (16.150 cmil) copper wire
at 120v. 215 feet one way and load of 39amps? 13.1
6. If a voltage source of a circuit provides 240 volts and there
are 5 ohms of resistance, how much current is in the circuit
48amps
,7. What should be done to change rotation of a 3-phase
motor? swap any two T leads
8. What instrument is used to measure current? Ammeter
9. Which plan indicates the location of structures and
equipment on a property?Detail drawing
10. Generally, the most ideal conductor is made of:
Copper
11 What is the standard size system used in the US? AWG
12. What is insulating tape? Non-Conductive adhesive tape
13. Which of these is used as a guide to assist cables
entering a conduit? Sheave
14. Which of the following is not a reason why electrical
systems must be grounded?
Limit the potential between ungrounded conductors
15. What type of conduit body is characterized by
a threaded straight hub on each end?
C
16. A megger will be used to check an in-service
cable. The electrician MUST be sure that the
, circuit is:
De-energized and locked, tagged out, and tested
17. Rubber gloves MUST be electrically tested at
MAXIMUM intervals of:
6 months
18. A dangerously high voltage is produced
when someone opens the secondary circuit
of a:
Current transformer
19. Which choice best describes the two types of
push button operators typically used in motor
controls
Open and closed
20. In the event of an emergency where the lockout/tagout
device is left secured, who can
remove the lockout/tagout device?
Authorized supervisor
21. A drawing showing a point A to point B
hookup of conductors is called a:
Wiring diagram
22. A NEMA type ___ enclosure is both watertight
and corrosion-resistant.
4X
QUESTIONS AND CORRECT ANSWERS LATEST 2025
1. Verifying the presence or absence of voltage should be
performed only by: Qualified individuals
2. The NEC recommends maintaining voltage within a 3%
drop. If a branch circuit operates at 240 volts AC, what is the
minimum circuit operating volt? 232
3. What is the name of the connecting device shown in the
diagram? split-bolt
4. The volt amperes in an AC circuit is the same as Apparent
power
5. What is the voltage drop for a #8 (16.150 cmil) copper wire
at 120v. 215 feet one way and load of 39amps? 13.1
6. If a voltage source of a circuit provides 240 volts and there
are 5 ohms of resistance, how much current is in the circuit
48amps
,7. What should be done to change rotation of a 3-phase
motor? swap any two T leads
8. What instrument is used to measure current? Ammeter
9. Which plan indicates the location of structures and
equipment on a property?Detail drawing
10. Generally, the most ideal conductor is made of:
Copper
11 What is the standard size system used in the US? AWG
12. What is insulating tape? Non-Conductive adhesive tape
13. Which of these is used as a guide to assist cables
entering a conduit? Sheave
14. Which of the following is not a reason why electrical
systems must be grounded?
Limit the potential between ungrounded conductors
15. What type of conduit body is characterized by
a threaded straight hub on each end?
C
16. A megger will be used to check an in-service
cable. The electrician MUST be sure that the
, circuit is:
De-energized and locked, tagged out, and tested
17. Rubber gloves MUST be electrically tested at
MAXIMUM intervals of:
6 months
18. A dangerously high voltage is produced
when someone opens the secondary circuit
of a:
Current transformer
19. Which choice best describes the two types of
push button operators typically used in motor
controls
Open and closed
20. In the event of an emergency where the lockout/tagout
device is left secured, who can
remove the lockout/tagout device?
Authorized supervisor
21. A drawing showing a point A to point B
hookup of conductors is called a:
Wiring diagram
22. A NEMA type ___ enclosure is both watertight
and corrosion-resistant.
4X
