The electrical NCCER test Questions
with correct Answers 2024
Which Article of the NEC covers grounding? - Correct Answer--article 250
Which of the following is a 90 degree, explosion proof fitting? - Correct Answer--
GUAL
What is a dropout plate? - Correct Answer--Metal plate with a curved surface for
cable to follow as it passes from the tray
All of the following are common service voltages in the United States EXCEPT: -
Correct Answer--372/575 3-PHASE, 4-WIRE
What does a GFCI breaker do? - Correct Answer--Opens a circuit to prevent
operation of an electrical device
What will happen when one or more coils in a winding are grounded? - Correct
Answer--The motor will automatically blow fuses
Eight incandescent lighting fixtures are to be installed. Each fixture is 120- volts,
with a 200-watt lamp. What is the total connected load? - Correct Answer--13.3
amps
The must be grounded in a bussed gutter if used as the main service equipment. -
Correct Answer--Neutral busbar
,When wall mounting cable tray, ensure that - Correct Answer--The building
structure is strong enough to support the tray system
The purpose of sealing cable ends when reels of cable are in storage is - Correct
Answer--To keep moisture from creeping in
The outer covering on liguid-tight flexible metal conduit is used for - Correct
Answer--A moisture seal
A good electrical connection should - Correct Answer--Be mechanically and
electrically secure
The symbol normally used for duplex - Correct Answer--Circle with two parallel
lines drawb through it
Disconnecting means are covered in - Correct Answer--NEC Section 110-22
In relation to switches, the term throw refers to the - Correct Answer--Number of
internal operations that a switch can perform
A 3-phase, 4-wire, 480v service requires ______ current transformer(s) - Correct
Answer--3
Services conductors and equipment are covered in - Correct Answer--NEC Article
230
,The NEC required that all receptacles installed on 25 amp and 20 amp branch
circuits be ______ receptacles - Correct Answer--Grounding
A transformer with the primary of 400 turns and a secondary of 300 turns has a
_____ - Correct Answer--Step-down turns ratio of 4:3
The circular mil is based on the - Correct Answer--Cross-sectional area of the wire
Of the termination classes listed below, ____ is the only one that provides a seal
against external elements. - Correct Answer--Class 1
Unless otherwise noted. the calculations in AC circuits _____ values. - Correct
Answer--Rms
When the coil turns are increased the _____ - Correct Answer--Induced voltage is
increased
As the temperature surrounding a self-regulating heating cable rises, the ____ -
Correct Answer--Resistance of the polymeric core increases
The motor type that has the highest starting torque is the ____ motor. - Correct
Answer--Capacitor-start
For a given number of poles, the ____ determines the speed of an AC motor. -
Correct Answer--Frequency
, Both induction and synchronous motors operate on the principle of a rotating
____ field - Correct Answer--Magnetic
A transformer has 200 turns in the primary, 150 turns in the secondary, and
120VAC applied to the primary. The voltage across the secondary is: - Correct
Answer--90Volts
The output capacity of a motor is rated in - Correct Answer--Horsepower
The synchronous speed at which a pole, 60 Hz induction motor operates is rpm. -
Correct Answer--1,800
The sine of 0 degree is - Correct Answer--0
Meters used in AC circuits indicate the - Correct Answer--Effective
The component labeled 7 in figure 1 is a(n) - Correct Answer--End seal
In an AC circuit containing resistance only _____ will flow if the resistance is 10
ohms and the voltage is 120V. - Correct Answer--12A
The _____ rotor types are generally rugged. - Correct Answer--Squirrel cage
Proofs tests are made at_ of the original factory voltage. - Correct Answer--60%
with correct Answers 2024
Which Article of the NEC covers grounding? - Correct Answer--article 250
Which of the following is a 90 degree, explosion proof fitting? - Correct Answer--
GUAL
What is a dropout plate? - Correct Answer--Metal plate with a curved surface for
cable to follow as it passes from the tray
All of the following are common service voltages in the United States EXCEPT: -
Correct Answer--372/575 3-PHASE, 4-WIRE
What does a GFCI breaker do? - Correct Answer--Opens a circuit to prevent
operation of an electrical device
What will happen when one or more coils in a winding are grounded? - Correct
Answer--The motor will automatically blow fuses
Eight incandescent lighting fixtures are to be installed. Each fixture is 120- volts,
with a 200-watt lamp. What is the total connected load? - Correct Answer--13.3
amps
The must be grounded in a bussed gutter if used as the main service equipment. -
Correct Answer--Neutral busbar
,When wall mounting cable tray, ensure that - Correct Answer--The building
structure is strong enough to support the tray system
The purpose of sealing cable ends when reels of cable are in storage is - Correct
Answer--To keep moisture from creeping in
The outer covering on liguid-tight flexible metal conduit is used for - Correct
Answer--A moisture seal
A good electrical connection should - Correct Answer--Be mechanically and
electrically secure
The symbol normally used for duplex - Correct Answer--Circle with two parallel
lines drawb through it
Disconnecting means are covered in - Correct Answer--NEC Section 110-22
In relation to switches, the term throw refers to the - Correct Answer--Number of
internal operations that a switch can perform
A 3-phase, 4-wire, 480v service requires ______ current transformer(s) - Correct
Answer--3
Services conductors and equipment are covered in - Correct Answer--NEC Article
230
,The NEC required that all receptacles installed on 25 amp and 20 amp branch
circuits be ______ receptacles - Correct Answer--Grounding
A transformer with the primary of 400 turns and a secondary of 300 turns has a
_____ - Correct Answer--Step-down turns ratio of 4:3
The circular mil is based on the - Correct Answer--Cross-sectional area of the wire
Of the termination classes listed below, ____ is the only one that provides a seal
against external elements. - Correct Answer--Class 1
Unless otherwise noted. the calculations in AC circuits _____ values. - Correct
Answer--Rms
When the coil turns are increased the _____ - Correct Answer--Induced voltage is
increased
As the temperature surrounding a self-regulating heating cable rises, the ____ -
Correct Answer--Resistance of the polymeric core increases
The motor type that has the highest starting torque is the ____ motor. - Correct
Answer--Capacitor-start
For a given number of poles, the ____ determines the speed of an AC motor. -
Correct Answer--Frequency
, Both induction and synchronous motors operate on the principle of a rotating
____ field - Correct Answer--Magnetic
A transformer has 200 turns in the primary, 150 turns in the secondary, and
120VAC applied to the primary. The voltage across the secondary is: - Correct
Answer--90Volts
The output capacity of a motor is rated in - Correct Answer--Horsepower
The synchronous speed at which a pole, 60 Hz induction motor operates is rpm. -
Correct Answer--1,800
The sine of 0 degree is - Correct Answer--0
Meters used in AC circuits indicate the - Correct Answer--Effective
The component labeled 7 in figure 1 is a(n) - Correct Answer--End seal
In an AC circuit containing resistance only _____ will flow if the resistance is 10
ohms and the voltage is 120V. - Correct Answer--12A
The _____ rotor types are generally rugged. - Correct Answer--Squirrel cage
Proofs tests are made at_ of the original factory voltage. - Correct Answer--60%
