THE ELECTRICAL NCCER EXAM PAPER 2025/2026
QUESTIONS WITH SOLUTIONS GRADED A+
✔✔the main purpose of a revision block on an electrical drawing is to - ✔✔Note any
changes to the original drawings
✔✔Which of the following is the classified location where combustible vapors are
always present? - ✔✔Class 1 , Division 1
✔✔Exposed field-rounted electrical conduit should be installed so that it : - ✔✔is plumb
and level
✔✔When wiring a 3- wire control push button control circuit, the auxiliary holding
contact (seal-in) is wired with the start button in : - ✔✔parallel
✔✔Ferrous metal raceways , boxes , fittings, and supports must be protected against: -
✔✔corrosion
✔✔With a row of 3 -4" conduits and a second row of 3 -2" and 2 -1" conduits for a angle
pull box what is the minimum distance between the opposite walls of the pull box ? -
✔✔32"
✔✔A conductor with 220 mils of insulation would have insulation thickness of - ✔✔0.22"
✔✔A protective device for limiting voltage spikes by discharging or bypassing surge
current is called a : - ✔✔surge limiter
✔✔Which one of the fuses is a standard size according to the NEC? - ✔✔3
✔✔What is the symbol for the secondary side of a transformer? - ✔✔X
✔✔The most common transformer found on an industrial site is: - ✔✔Single phase step
down
✔✔Applications for heat tracing systems with a self regulating control include those
requiring a narrow operating range and : - ✔✔Temperature sensitive fluids
✔✔With a row of 3 -4" conduits and second row of 3 -2" and 1-1" conduits on each side
for a straight pull box what is the minimum distance between the opposite walls of the
pull box? - ✔✔32"
✔✔When installing cables smaller then 4/0 in a cable tray, the allowable cable fill area
must not be less than the sum of the cable : - ✔✔cross-sectional areas
, ✔✔The meter used to measure pulling tension is known as a : - ✔✔dynamometer
✔✔On a push button, normally closed contacts are generally usedto open a circuit to : -
✔✔initate a stop or off circuit function
✔✔How should heat shrink insulators be installed? - ✔✔The insulator should be slipped
over the connector and heat should be applied for a few seconds
✔✔The conductor used to connect the system grounded conductor or the equipment to
grounding electrode or to a point on the grounding electrode system is called a
grounding: - ✔✔electrode conductor
✔✔A material with poor electrical conducting properties is a good - ✔✔insulator
✔✔A 1000 KVA three phase transformer has a secondary voltage of 208/120. What is
the secondary full load amperage? - ✔✔4817
✔✔A 1500 KVA three phase transformer has a secondary voltage of 480/277. What is
the secondary full load amperage? - ✔✔
✔✔A type LB conduit body has the cover on : - ✔✔The back
✔✔Which of the following is the classified location where combustible dust may be
present ? - ✔✔Class 1 , Division 1
✔✔What is the purpose of lockout/tagout? - ✔✔prevent operation
✔✔When installing more than one ground rod , what is the minimum spacing between
rods? - ✔✔6 ft.
✔✔How does a battery produce voltage? - ✔✔Electromagnetism
✔✔Why should the proper rope be selected for a cable pull? - ✔✔To maximize safety.
✔✔A voltage source of a circuit provides 240 volts and draws 48 amps. How much
resistance is in the circuit? - ✔✔5 ohms.
✔✔When re-setting a circuit breaker, where should the worker stand? - ✔✔On the
handle side
✔✔What size is needed for a 120v circuit 215 feet long one way with a load of 39
amps? - ✔✔#6
QUESTIONS WITH SOLUTIONS GRADED A+
✔✔the main purpose of a revision block on an electrical drawing is to - ✔✔Note any
changes to the original drawings
✔✔Which of the following is the classified location where combustible vapors are
always present? - ✔✔Class 1 , Division 1
✔✔Exposed field-rounted electrical conduit should be installed so that it : - ✔✔is plumb
and level
✔✔When wiring a 3- wire control push button control circuit, the auxiliary holding
contact (seal-in) is wired with the start button in : - ✔✔parallel
✔✔Ferrous metal raceways , boxes , fittings, and supports must be protected against: -
✔✔corrosion
✔✔With a row of 3 -4" conduits and a second row of 3 -2" and 2 -1" conduits for a angle
pull box what is the minimum distance between the opposite walls of the pull box ? -
✔✔32"
✔✔A conductor with 220 mils of insulation would have insulation thickness of - ✔✔0.22"
✔✔A protective device for limiting voltage spikes by discharging or bypassing surge
current is called a : - ✔✔surge limiter
✔✔Which one of the fuses is a standard size according to the NEC? - ✔✔3
✔✔What is the symbol for the secondary side of a transformer? - ✔✔X
✔✔The most common transformer found on an industrial site is: - ✔✔Single phase step
down
✔✔Applications for heat tracing systems with a self regulating control include those
requiring a narrow operating range and : - ✔✔Temperature sensitive fluids
✔✔With a row of 3 -4" conduits and second row of 3 -2" and 1-1" conduits on each side
for a straight pull box what is the minimum distance between the opposite walls of the
pull box? - ✔✔32"
✔✔When installing cables smaller then 4/0 in a cable tray, the allowable cable fill area
must not be less than the sum of the cable : - ✔✔cross-sectional areas
, ✔✔The meter used to measure pulling tension is known as a : - ✔✔dynamometer
✔✔On a push button, normally closed contacts are generally usedto open a circuit to : -
✔✔initate a stop or off circuit function
✔✔How should heat shrink insulators be installed? - ✔✔The insulator should be slipped
over the connector and heat should be applied for a few seconds
✔✔The conductor used to connect the system grounded conductor or the equipment to
grounding electrode or to a point on the grounding electrode system is called a
grounding: - ✔✔electrode conductor
✔✔A material with poor electrical conducting properties is a good - ✔✔insulator
✔✔A 1000 KVA three phase transformer has a secondary voltage of 208/120. What is
the secondary full load amperage? - ✔✔4817
✔✔A 1500 KVA three phase transformer has a secondary voltage of 480/277. What is
the secondary full load amperage? - ✔✔
✔✔A type LB conduit body has the cover on : - ✔✔The back
✔✔Which of the following is the classified location where combustible dust may be
present ? - ✔✔Class 1 , Division 1
✔✔What is the purpose of lockout/tagout? - ✔✔prevent operation
✔✔When installing more than one ground rod , what is the minimum spacing between
rods? - ✔✔6 ft.
✔✔How does a battery produce voltage? - ✔✔Electromagnetism
✔✔Why should the proper rope be selected for a cable pull? - ✔✔To maximize safety.
✔✔A voltage source of a circuit provides 240 volts and draws 48 amps. How much
resistance is in the circuit? - ✔✔5 ohms.
✔✔When re-setting a circuit breaker, where should the worker stand? - ✔✔On the
handle side
✔✔What size is needed for a 120v circuit 215 feet long one way with a load of 39
amps? - ✔✔#6
