NCCER ELECTRICAL CERTIFICATION TEST LATEST
2025 WITH 400 EXAM PRACTICE QUESTIONS AND
CORRECT ANSWERS/ ELECTRICAL NCCER
CERTIFICATION EXAM 2025 (MOST RECENT)
•
Which Article of the NEC covers grounding?
article 250
Which of the following is a 90 degree, explosion proof
fitting?
GUAL
What is a dropout plate?
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:
372/575 3-PHASE, 4-WIRE
What does a GFCI breaker do?
Opens a circuit to prevent operation of an electrical device
What will happen when one or more coils in a winding are
grounded?
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?
13.3 amps
The must be grounded in a bussed gutter if used as the main
service equipment.
Neutral busbar
When wall mounting cable tray, ensure that
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
To keep moisture from creeping in
The outer covering on liguid-tight flexible metal conduit is
used for
A moisture seal
A good electrical connection should
Be mechanically and electrically secure
The symbol normally used for duplex
Circle with two parallel lines drawb through it
Disconnecting means are covered in
NEC Section 110-22
In relation to switches, the term throw refers to the
Number of internal operations that a switch can perform
A 3-phase, 4-wire, 480v service requires ______ current
transformer(s)
3
Services conductors and equipment are covered in
NEC Article 230
The NEC required that all receptacles installed on 25 amp
and 20 amp branch circuits be ______ receptacles
,Grounding
A transformer with the primary of 400 turns and a
secondary of 300 turns has a _____
Step-down turns ratio of 4:3
The circular mil is based on the
Cross-sectional area of the wire
Of the termination classes listed below, ____ is the only one
that provides a seal against external elements.
Class 1
Unless otherwise noted. the calculations in AC circuits _____
values.
Rms
When the coil turns are increased the _____
Induced voltage is increased
As the temperature surrounding a self-regulating heating
cable rises, the ____
Resistance of the polymeric core increases
The motor type that has the highest starting torque is the
____ motor.
Capacitor-start
For a given number of poles, the ____ determines the speed
of an AC motor.
Frequency
Both induction and synchronous motors operate on the
principle of a rotating ____ field
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:
90Volts
The output capacity of a motor is rated in
, Horsepower
The synchronous speed at which a pole, 60 Hz induction
motor operates is rpm.
1,800
The sine of 0 degree is
0
Meters used in AC circuits indicate the
Effective
The component labeled 7 in figure 1 is a(n)
End seal
In an AC circuit containing resistance only _____ will flow if
the resistance is 10 ohms and the voltage is 120V.
12A
The _____ rotor types are generally rugged.
Squirrel cage
Proofs tests are made at_ of the original factory voltage.
60%
Which type of heating cable cannot be cut and terminated in
the field?
Mineral insulated
The secondary of a CT under load should not be opened
because of_.
Induced high voltage
In a transformer ______
Electromagnetic Induction Ocurs
When a ground rod is installed, the top of the rod must be
positioned ______ grade.
Flush with or below
When making offset bends, the two kicks must be made
perfectly parallel or the resulting offset will have a _____
Crooked Bend
2025 WITH 400 EXAM PRACTICE QUESTIONS AND
CORRECT ANSWERS/ ELECTRICAL NCCER
CERTIFICATION EXAM 2025 (MOST RECENT)
•
Which Article of the NEC covers grounding?
article 250
Which of the following is a 90 degree, explosion proof
fitting?
GUAL
What is a dropout plate?
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:
372/575 3-PHASE, 4-WIRE
What does a GFCI breaker do?
Opens a circuit to prevent operation of an electrical device
What will happen when one or more coils in a winding are
grounded?
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?
13.3 amps
The must be grounded in a bussed gutter if used as the main
service equipment.
Neutral busbar
When wall mounting cable tray, ensure that
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
To keep moisture from creeping in
The outer covering on liguid-tight flexible metal conduit is
used for
A moisture seal
A good electrical connection should
Be mechanically and electrically secure
The symbol normally used for duplex
Circle with two parallel lines drawb through it
Disconnecting means are covered in
NEC Section 110-22
In relation to switches, the term throw refers to the
Number of internal operations that a switch can perform
A 3-phase, 4-wire, 480v service requires ______ current
transformer(s)
3
Services conductors and equipment are covered in
NEC Article 230
The NEC required that all receptacles installed on 25 amp
and 20 amp branch circuits be ______ receptacles
,Grounding
A transformer with the primary of 400 turns and a
secondary of 300 turns has a _____
Step-down turns ratio of 4:3
The circular mil is based on the
Cross-sectional area of the wire
Of the termination classes listed below, ____ is the only one
that provides a seal against external elements.
Class 1
Unless otherwise noted. the calculations in AC circuits _____
values.
Rms
When the coil turns are increased the _____
Induced voltage is increased
As the temperature surrounding a self-regulating heating
cable rises, the ____
Resistance of the polymeric core increases
The motor type that has the highest starting torque is the
____ motor.
Capacitor-start
For a given number of poles, the ____ determines the speed
of an AC motor.
Frequency
Both induction and synchronous motors operate on the
principle of a rotating ____ field
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:
90Volts
The output capacity of a motor is rated in
, Horsepower
The synchronous speed at which a pole, 60 Hz induction
motor operates is rpm.
1,800
The sine of 0 degree is
0
Meters used in AC circuits indicate the
Effective
The component labeled 7 in figure 1 is a(n)
End seal
In an AC circuit containing resistance only _____ will flow if
the resistance is 10 ohms and the voltage is 120V.
12A
The _____ rotor types are generally rugged.
Squirrel cage
Proofs tests are made at_ of the original factory voltage.
60%
Which type of heating cable cannot be cut and terminated in
the field?
Mineral insulated
The secondary of a CT under load should not be opened
because of_.
Induced high voltage
In a transformer ______
Electromagnetic Induction Ocurs
When a ground rod is installed, the top of the rod must be
positioned ______ grade.
Flush with or below
When making offset bends, the two kicks must be made
perfectly parallel or the resulting offset will have a _____
Crooked Bend
