ELECTRICAL NCCER TEST REVIEW
QUESTIONS AND ANSWERS
Electrical hand tools that use a regular 120-volt system MUST be 3-wire grounded
UNLESS the: - Answer-tool is double-insulated and is approved by an independent
testing facility.
A conductor with 220 mils of insulation would have insulation thickness of: - Answer-
0.22"
What is the purpose of sealing cable ends that are in storage? - Answer-to keep
moisture from entering it
Which one of the fuses is a standard size according to the NEC? - Answer-3
A 1000 KVA three phase transformer has a secondary voltage of 208/120. What is the
secondary full load amperage? - Answer-
A megohmmeter will be used to check a cable. The electrician MUST be sure that the
circuit is - Answer-de-energized and locked, tagged out, and tested.
A protective device for limiting voltage spikes by discharging or bypassing surge current
is called a: - Answer-surge limiter
What is the resultant distance between center bends for a 10-inch offset at 15 degrees?
- Answer-38.7 In.
What is the symbol for the SECONDARY side of a transformer? - Answer-x
The most common transformer found on an industrial site is: - Answer-Single phase
step down
Applications for heat tracing systems with self regulating control include those requiring
a narrow operating range and: - Answer-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? - Answer-32"
As the mechanical load increases on a squirrel cage induction motor: - Answer-torque
decreases and stator current increases
, When installing cables smaller than 4/0 in a cable tray, the allowable cable fill area must
not be less than the sum of the cable: - Answer-cross-sectional areas.
The meter used to measure pulling tension is known as: - Answer-dynamometer
On a push button, normally close contacts are generally used to open a circuit to : -
Answer-initiate a stop or off circuit function
How should heat-shrink insulators be installed? - Answer-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 a
grounding electrode or to a point on the grounding electrode system is called a
grounding: - Answer-electrode conductor
A material with poor electrical conducting properties is a good - Answer-insulator
A current transformer has a rating of 4000:5. If 2000 amps load is on the primary, the
secondary output would produce: - Answer-2.5 amps
A 1500 KVA three-phase transformer has a secondary voltage of 480/277. What is the
secondary full load amperage - Answer-
Type LB conduit body has the cover on: - Answer-the back
What is the purpose of lockout/tagout? - Answer-prevent operation
Why should the proper rope be selected for a cable pull? - Answer-to maximize safety
An electrician that attempts to install or remove energized fuses will be exposed to the
risk of an electrical shock and an electrical: - Answer-arc.
What is the approximate developed length of a 40" radius 90" bend? - Answer-63
Which of the following is the classified location where combustible dust may be
present? - Answer-Class I Div I
Which of the following is the classified location where combustible fibers are always
present? - Answer-Class III, Div
When installing more than one ground rod, what is the MINIMUM spacing between
rods? - Answer-6 ft.
How does a battery produce voltage? - Answer-electromagnetism
QUESTIONS AND ANSWERS
Electrical hand tools that use a regular 120-volt system MUST be 3-wire grounded
UNLESS the: - Answer-tool is double-insulated and is approved by an independent
testing facility.
A conductor with 220 mils of insulation would have insulation thickness of: - Answer-
0.22"
What is the purpose of sealing cable ends that are in storage? - Answer-to keep
moisture from entering it
Which one of the fuses is a standard size according to the NEC? - Answer-3
A 1000 KVA three phase transformer has a secondary voltage of 208/120. What is the
secondary full load amperage? - Answer-
A megohmmeter will be used to check a cable. The electrician MUST be sure that the
circuit is - Answer-de-energized and locked, tagged out, and tested.
A protective device for limiting voltage spikes by discharging or bypassing surge current
is called a: - Answer-surge limiter
What is the resultant distance between center bends for a 10-inch offset at 15 degrees?
- Answer-38.7 In.
What is the symbol for the SECONDARY side of a transformer? - Answer-x
The most common transformer found on an industrial site is: - Answer-Single phase
step down
Applications for heat tracing systems with self regulating control include those requiring
a narrow operating range and: - Answer-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? - Answer-32"
As the mechanical load increases on a squirrel cage induction motor: - Answer-torque
decreases and stator current increases
, When installing cables smaller than 4/0 in a cable tray, the allowable cable fill area must
not be less than the sum of the cable: - Answer-cross-sectional areas.
The meter used to measure pulling tension is known as: - Answer-dynamometer
On a push button, normally close contacts are generally used to open a circuit to : -
Answer-initiate a stop or off circuit function
How should heat-shrink insulators be installed? - Answer-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 a
grounding electrode or to a point on the grounding electrode system is called a
grounding: - Answer-electrode conductor
A material with poor electrical conducting properties is a good - Answer-insulator
A current transformer has a rating of 4000:5. If 2000 amps load is on the primary, the
secondary output would produce: - Answer-2.5 amps
A 1500 KVA three-phase transformer has a secondary voltage of 480/277. What is the
secondary full load amperage - Answer-
Type LB conduit body has the cover on: - Answer-the back
What is the purpose of lockout/tagout? - Answer-prevent operation
Why should the proper rope be selected for a cable pull? - Answer-to maximize safety
An electrician that attempts to install or remove energized fuses will be exposed to the
risk of an electrical shock and an electrical: - Answer-arc.
What is the approximate developed length of a 40" radius 90" bend? - Answer-63
Which of the following is the classified location where combustible dust may be
present? - Answer-Class I Div I
Which of the following is the classified location where combustible fibers are always
present? - Answer-Class III, Div
When installing more than one ground rod, what is the MINIMUM spacing between
rods? - Answer-6 ft.
How does a battery produce voltage? - Answer-electromagnetism
