NCCER ELECTRICAL CERTIFICATION TEST LATEST 2025 WITH
250 EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS/
ELECTRICAL NCCER CERTIFICATION EXAM 2025 (MOST
RECENT)
Which of the following describes the grounding of metal parts that do not carry current in a
distribution system? - answer-Equipment grounding
Which of the following statements is true about cadweld molds is true? - answer-Cadweld molds
are sized to fit the cable that is being welded
Where is nonmetallic conduit PVC used? - answer-Both above and below ground
Which of the following is designed for high-tension wire pulls? - answer-Nylon
conduit piston (mouse) is used for what application? - answer-Cleaning the conduit
When a cable tray system must be protected from sunlight, which is true? - answer-Cable tray
covers
What is the maximum voltage of conductors on which wire nuts may be used for interior wiring? -
answer-600 volts
How is metering of electricity accomplished for services rated greater 400 amps? - answer-By
using a CT metering
The terminations on a motor starter are tightended incorrectly, what may happen? - answer-It
will create an ARC and increase the amperage the motor is pulling
,A section of a cable tray that makes 2 vertical 90 degree turns is known as? - answer-A vertical
"T"
What should be done to change the rotation of a 3-phase motor? - answer-Swap any two leads
What is the typical voltage of a control transformer for 3-phase, 480 volt starter - answer-110
volts
Which of the following determines the pulling force applied to the cable when using a tugger? -
answer-The number of wraps on the tugger drum
What is the maximum allowance fill when installing 3 or more conductors in a conduit? - answer-
40%
Which of the following conductors has the least resistance? - answer-1/0 awg
All things considered, the most ideal conductor is? - answer-Сopper
All of the following apply to the installation of junction boxes, splices boxes, and pull boxes except
that they must be? - answer-Metal
A box has two 12/2 with ground cables in it, all like-colored wires have been spliced and "pigtail",
how many #12 conductors should be counted in the box fill? - answer-5
Which of the following abbreviations describe the inturrpting capacity of a circuit breakers of fuses? -
answer-AMP
What part of the motor starter protects the motor if there is a problem in the system? - answer-
Overload relay
, What is the voltage drop for a 208V single-phase circuit with a load of 2615 amps, using #8 copper
conductor (16,510 circular mil) at a circuit length of 145ft? - answer-5.20
The purpose of a rectifier is to - answer-Convert AC into DC
How is a transformer rated for power output? - answer-Volt-amperes
Which of the following is the most severe hazardous classification? - answer-Class 1, division 1
What is the term for a transformer whose primary and secondary circuit have part of a winding in
common? - answer-The 2 circuit are not isolated from each other. Auto transformer
All of the following rating appear on a circuit breaker nameplate, except - answer-Rated wattage
The trip rating of a circuit breaker used in the main proctective device in a panelboard cannot
exceed? - answer-The total amp of the branch breakers
A transformer has a turn ratio of 5:1, what will be the voltage on the secondary if primary voltage is
120v? - answer-24 volts
Which of the following types are raceways is approved for use in class 1 division 1 hazardous
location? - answer-Rigid metal conduit
Which of the following would be found in a class 1 location? - answer-Three threads on conduit
connections
The drawing scale is (most) likely to be found in which of the following drawing location? -
answer-The drawing title block
To slightly change elevation of a cable tray - answer-Swivel plates
250 EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS/
ELECTRICAL NCCER CERTIFICATION EXAM 2025 (MOST
RECENT)
Which of the following describes the grounding of metal parts that do not carry current in a
distribution system? - answer-Equipment grounding
Which of the following statements is true about cadweld molds is true? - answer-Cadweld molds
are sized to fit the cable that is being welded
Where is nonmetallic conduit PVC used? - answer-Both above and below ground
Which of the following is designed for high-tension wire pulls? - answer-Nylon
conduit piston (mouse) is used for what application? - answer-Cleaning the conduit
When a cable tray system must be protected from sunlight, which is true? - answer-Cable tray
covers
What is the maximum voltage of conductors on which wire nuts may be used for interior wiring? -
answer-600 volts
How is metering of electricity accomplished for services rated greater 400 amps? - answer-By
using a CT metering
The terminations on a motor starter are tightended incorrectly, what may happen? - answer-It
will create an ARC and increase the amperage the motor is pulling
,A section of a cable tray that makes 2 vertical 90 degree turns is known as? - answer-A vertical
"T"
What should be done to change the rotation of a 3-phase motor? - answer-Swap any two leads
What is the typical voltage of a control transformer for 3-phase, 480 volt starter - answer-110
volts
Which of the following determines the pulling force applied to the cable when using a tugger? -
answer-The number of wraps on the tugger drum
What is the maximum allowance fill when installing 3 or more conductors in a conduit? - answer-
40%
Which of the following conductors has the least resistance? - answer-1/0 awg
All things considered, the most ideal conductor is? - answer-Сopper
All of the following apply to the installation of junction boxes, splices boxes, and pull boxes except
that they must be? - answer-Metal
A box has two 12/2 with ground cables in it, all like-colored wires have been spliced and "pigtail",
how many #12 conductors should be counted in the box fill? - answer-5
Which of the following abbreviations describe the inturrpting capacity of a circuit breakers of fuses? -
answer-AMP
What part of the motor starter protects the motor if there is a problem in the system? - answer-
Overload relay
, What is the voltage drop for a 208V single-phase circuit with a load of 2615 amps, using #8 copper
conductor (16,510 circular mil) at a circuit length of 145ft? - answer-5.20
The purpose of a rectifier is to - answer-Convert AC into DC
How is a transformer rated for power output? - answer-Volt-amperes
Which of the following is the most severe hazardous classification? - answer-Class 1, division 1
What is the term for a transformer whose primary and secondary circuit have part of a winding in
common? - answer-The 2 circuit are not isolated from each other. Auto transformer
All of the following rating appear on a circuit breaker nameplate, except - answer-Rated wattage
The trip rating of a circuit breaker used in the main proctective device in a panelboard cannot
exceed? - answer-The total amp of the branch breakers
A transformer has a turn ratio of 5:1, what will be the voltage on the secondary if primary voltage is
120v? - answer-24 volts
Which of the following types are raceways is approved for use in class 1 division 1 hazardous
location? - answer-Rigid metal conduit
Which of the following would be found in a class 1 location? - answer-Three threads on conduit
connections
The drawing scale is (most) likely to be found in which of the following drawing location? -
answer-The drawing title block
To slightly change elevation of a cable tray - answer-Swivel plates
