ELECTRICAL NCCER LATEST COMPREHENSIVE EXAM
QUESTIONS AND ANSWERS SURE A+
✔✔Which of the following factors is used to control the speed of an induction motor? -
✔✔Frequency
✔✔Electrical hand tools that use a regular 120-volt system MUST be 3-wire grounded
UNLESS the: - ✔✔tool is double-insulated and is approved by an independent testing
facility.
✔✔A conductor with 220 mils of insulation would have insulation thickness of: -
✔✔0.22"
✔✔What is the purpose of sealing cable ends that are in storage? - ✔✔to keep moisture
from entering it
✔✔Which one of the fuses is a standard size according to the NEC? - ✔✔3
✔✔A 1000 KVA three phase transformer has a secondary voltage of 208/120. What is
the secondary full load amperage? - ✔✔
, ✔✔A megohmmeter will be used to check a cable. The electrician MUST be sure that
the circuit is - ✔✔de-energized and locked, tagged out, and tested.
✔✔A protective device for limiting voltage spikes by discharging or bypassing surge
current is called a: - ✔✔surge limiter
✔✔What is the resultant distance between center bends for a 10-inch offset at 15
degrees? - ✔✔38.7 In.
✔✔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 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"
✔✔As the mechanical load increases on a squirrel cage induction motor: - ✔✔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: - ✔✔cross-sectional areas.
✔✔The meter used to measure pulling tension is known as: - ✔✔dynamometer
✔✔On a push button, normally close contacts are generally used to open a circuit to : -
✔✔initiate 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
a 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 current transformer has a rating of 4000:5. If 2000 amps load is on the primary,
the secondary output would produce: - ✔✔2.5 amps
QUESTIONS AND ANSWERS SURE A+
✔✔Which of the following factors is used to control the speed of an induction motor? -
✔✔Frequency
✔✔Electrical hand tools that use a regular 120-volt system MUST be 3-wire grounded
UNLESS the: - ✔✔tool is double-insulated and is approved by an independent testing
facility.
✔✔A conductor with 220 mils of insulation would have insulation thickness of: -
✔✔0.22"
✔✔What is the purpose of sealing cable ends that are in storage? - ✔✔to keep moisture
from entering it
✔✔Which one of the fuses is a standard size according to the NEC? - ✔✔3
✔✔A 1000 KVA three phase transformer has a secondary voltage of 208/120. What is
the secondary full load amperage? - ✔✔
, ✔✔A megohmmeter will be used to check a cable. The electrician MUST be sure that
the circuit is - ✔✔de-energized and locked, tagged out, and tested.
✔✔A protective device for limiting voltage spikes by discharging or bypassing surge
current is called a: - ✔✔surge limiter
✔✔What is the resultant distance between center bends for a 10-inch offset at 15
degrees? - ✔✔38.7 In.
✔✔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 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"
✔✔As the mechanical load increases on a squirrel cage induction motor: - ✔✔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: - ✔✔cross-sectional areas.
✔✔The meter used to measure pulling tension is known as: - ✔✔dynamometer
✔✔On a push button, normally close contacts are generally used to open a circuit to : -
✔✔initiate 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
a 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 current transformer has a rating of 4000:5. If 2000 amps load is on the primary,
the secondary output would produce: - ✔✔2.5 amps
