The electrical NCCER test EXAM QUESTIONS WITH
Detailed Answer Key For (2025|2026) Exam, A+
Solutions
Which Article of the NEC covers grounding? - (ANSWER)article 250
Which of the following is a 90 degree, explosion proof fitting? - (ANSWER)GUAL
What is a dropout plate? - (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: -
(ANSWER)372/575 3-PHASE, 4-WIRE
What does a GFCI breaker do? - (ANSWER)Opens a circuit to prevent operation of
an electrical device
What will happen when one or more coils in a winding are grounded? -
(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? - (ANSWER)13.3 amps
The must be grounded in a bussed gutter if used as the main service equipment. -
(ANSWER)Neutral busbar
,When wall mounting cable tray, ensure that - (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 -
(ANSWER)To keep moisture from creeping in
The outer covering on liguid-tight flexible metal conduit is used for - (ANSWER)A
moisture seal
A good electrical connection should - (ANSWER)Be mechanically and electrically
secure
The symbol normally used for duplex - (ANSWER)Circle with two parallel lines
drawb through it
Disconnecting means are covered in - (ANSWER)NEC Section 110-22
In relation to switches, the term throw refers to the - (ANSWER)Number of
internal operations that a switch can perform
A 3-phase, 4-wire, 480v service requires ______ current transformer(s) -
(ANSWER)3
,Services conductors and equipment are covered in - (ANSWER)NEC Article 230
The NEC required that all receptacles installed on 25 amp and 20 amp branch
circuits be ______ receptacles - (ANSWER)Grounding
A transformer with the primary of 400 turns and a secondary of 300 turns has a
_____ - (ANSWER)Step-down turns ratio of 4:3
The circular mil is based on the - (ANSWER)Cross-sectional area of the wire
Of the termination classes listed below, ____ is the only one that provides a seal
against external elements. - (ANSWER)Class 1
Unless otherwise noted. the calculations in AC circuits _____ values. -
(ANSWER)Rms
When the coil turns are increased the _____ - (ANSWER)Induced voltage is
increased
As the temperature surrounding a self-regulating heating cable rises, the ____ -
(ANSWER)Resistance of the polymeric core increases
The motor type that has the highest starting torque is the ____ motor. -
(ANSWER)Capacitor-start
, For a given number of poles, the ____ determines the speed of an AC motor. -
(ANSWER)Frequency
Both induction and synchronous motors operate on the principle of a rotating
____ field - (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: -
(ANSWER)90Volts
The output capacity of a motor is rated in - (ANSWER)Horsepower
The synchronous speed at which a pole, 60 Hz induction motor operates is rpm. -
(ANSWER)1,800
The sine of 0 degree is - (ANSWER)0
Meters used in AC circuits indicate the - (ANSWER)Effective
The component labeled 7 in figure 1 is a(n) - (ANSWER)End seal
In an AC circuit containing resistance only _____ will flow if the resistance is 10
ohms and the voltage is 120V. - (ANSWER)12A
Detailed Answer Key For (2025|2026) Exam, A+
Solutions
Which Article of the NEC covers grounding? - (ANSWER)article 250
Which of the following is a 90 degree, explosion proof fitting? - (ANSWER)GUAL
What is a dropout plate? - (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: -
(ANSWER)372/575 3-PHASE, 4-WIRE
What does a GFCI breaker do? - (ANSWER)Opens a circuit to prevent operation of
an electrical device
What will happen when one or more coils in a winding are grounded? -
(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? - (ANSWER)13.3 amps
The must be grounded in a bussed gutter if used as the main service equipment. -
(ANSWER)Neutral busbar
,When wall mounting cable tray, ensure that - (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 -
(ANSWER)To keep moisture from creeping in
The outer covering on liguid-tight flexible metal conduit is used for - (ANSWER)A
moisture seal
A good electrical connection should - (ANSWER)Be mechanically and electrically
secure
The symbol normally used for duplex - (ANSWER)Circle with two parallel lines
drawb through it
Disconnecting means are covered in - (ANSWER)NEC Section 110-22
In relation to switches, the term throw refers to the - (ANSWER)Number of
internal operations that a switch can perform
A 3-phase, 4-wire, 480v service requires ______ current transformer(s) -
(ANSWER)3
,Services conductors and equipment are covered in - (ANSWER)NEC Article 230
The NEC required that all receptacles installed on 25 amp and 20 amp branch
circuits be ______ receptacles - (ANSWER)Grounding
A transformer with the primary of 400 turns and a secondary of 300 turns has a
_____ - (ANSWER)Step-down turns ratio of 4:3
The circular mil is based on the - (ANSWER)Cross-sectional area of the wire
Of the termination classes listed below, ____ is the only one that provides a seal
against external elements. - (ANSWER)Class 1
Unless otherwise noted. the calculations in AC circuits _____ values. -
(ANSWER)Rms
When the coil turns are increased the _____ - (ANSWER)Induced voltage is
increased
As the temperature surrounding a self-regulating heating cable rises, the ____ -
(ANSWER)Resistance of the polymeric core increases
The motor type that has the highest starting torque is the ____ motor. -
(ANSWER)Capacitor-start
, For a given number of poles, the ____ determines the speed of an AC motor. -
(ANSWER)Frequency
Both induction and synchronous motors operate on the principle of a rotating
____ field - (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: -
(ANSWER)90Volts
The output capacity of a motor is rated in - (ANSWER)Horsepower
The synchronous speed at which a pole, 60 Hz induction motor operates is rpm. -
(ANSWER)1,800
The sine of 0 degree is - (ANSWER)0
Meters used in AC circuits indicate the - (ANSWER)Effective
The component labeled 7 in figure 1 is a(n) - (ANSWER)End seal
In an AC circuit containing resistance only _____ will flow if the resistance is 10
ohms and the voltage is 120V. - (ANSWER)12A
