Electrician NCCER Questions With Correct Answers 2024
Which article of the NEC covers grounding? - ANS-✔✔Article 250
What is a dropout plate? - ANS-✔✔Metal plate with a curve surface for cable to follow as it passes
from the tray
All of the following are common service voltages in the United States Except: - ANS-✔✔372/575 3-
Phase, 4-wire
What does a GFCI breaker do? - ANS-✔✔Opens a circuit to prevent operation of an electrical device
What will happen when one or more coils in a winding are grounded? - ANS-✔✔The motor will
automatically blow fuses
eight incandescent lighting fixtures are to be installed. Each fixture is 120 volts, with a 200-whatt lamp
what is the total connected load? - ANS-✔✔13.3 Amps
The __________must be grounded in a bussed glutter if use as the main service equipmemt - ANS-✔✔
Neutral busbar
When wall mounting cable tray, ensure that - ANS-✔✔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 ______________ - ANS-✔✔to
keep moisture from creeping in
The outer covering on liquid-tight flexible metal conduit is use for - ANS-✔✔A moisture seal
,A good electrical connection should - ANS-✔✔Be mechanically and electrically secure
The symbol normally use for duplex - ANS-✔✔Circle with two parallel lines draw through it
Disconnecting means are covered in - ANS-✔✔NEC section 110-22
In relation to switches, the term throw refers to the - ANS-✔✔Number of internal operations that
switch can perform
A 3-phase, 4-wire, 480v service requires ________ current transformers - ANS-✔✔3
Services conductors and equipment are covered in - ANS-✔✔NEC Article 230
The NEC required that all receptacles installed on 25 amp and 20 amp branch circuits be__________
receptacles - ANS-✔✔Grounding
The circular mil is based on the - ANS-✔✔Cross-sectional area of the wire
A transformer with the primary of 400 turns and a secondary of 300 turns has a - ANS-✔✔Step down
turns ratio of 4:3
Of the termination classes listed below,_____ is the only one that provides a seal against external
elements - ANS-✔✔Class 1
Unless otherwise noted, the calculations in AC circuits ______ values - ANS-✔✔Rms
When the coil turns increased the ________ - ANS-✔✔Induced voltage is increased
,As the temperature surrounding a self regulating heating cable rises, the ________ - ANS-✔✔
Resistance of the polymeric core increases
The motor type that has the highest starting torque is the _________ motor - ANS-✔✔Capacitor - start
For a given number of poles, the________ determines the speed of an AC Motor. - ANS-✔✔Frequency
Both induction and synchronous motor operate on the principle of the rotating________field - ANS-✔
✔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 - ANS-✔✔90 Volts
The output capacity of a motor is rated in - ANS-✔✔Horsepower
The synchronous speed at witcha 4 pole, 60 Hz induction motor operates is ________ rpm - ANS-✔✔
1800
The sine of 0 degree is - ANS-✔✔0
In a AC circuit containing resistance only, _______ 12A will flow if the resistance is 10 ohms and the
voltage is 120V - ANS-✔✔12A
The _____ rotor types are generally rugged - ANS-✔✔Squirrel cage
The componente labeled 7 in figure 1 is a (an) - ANS-✔✔End seal
, Meters used in AC circuits indicate the_______ - ANS-✔✔Effective
Proofs tests are made at________ oF the original factory voltage - ANS-✔✔60%
Which type of heating cable can not be cut and terminated in the field? - ANS-✔✔Mineral insulated
The secondary of a CT under load should not be opened because of______ - ANS-✔✔Induced hight
voltage
In a transformer,______ - ANS-✔✔Electromagnetic induction occurs
When a ground rod is installed, the top of the rod must be positioned _____.grade - ANS-✔✔Flush with
or below
When making offset bends, the two kicks must be made perfectly parallel or the resulting offset will
have a ________ - ANS-✔✔Crooked bend
All of the following types of condulet may be used as a pulling point for conduit that requires a 90
degree change in direction, except_______ - ANS-✔✔C
To be effective, a grounding system must limit the voltage on the electrical system and protect it from
all of the following, except ______ - ANS-✔✔Undervoltage conditions
What is the most common service use in a temporary power panel? - ANS-✔✔120/240 volt, 1-phase, 3-
wire
Which article of the NEC covers grounding? - ANS-✔✔Article 250
What is a dropout plate? - ANS-✔✔Metal plate with a curve surface for cable to follow as it passes
from the tray
All of the following are common service voltages in the United States Except: - ANS-✔✔372/575 3-
Phase, 4-wire
What does a GFCI breaker do? - ANS-✔✔Opens a circuit to prevent operation of an electrical device
What will happen when one or more coils in a winding are grounded? - ANS-✔✔The motor will
automatically blow fuses
eight incandescent lighting fixtures are to be installed. Each fixture is 120 volts, with a 200-whatt lamp
what is the total connected load? - ANS-✔✔13.3 Amps
The __________must be grounded in a bussed glutter if use as the main service equipmemt - ANS-✔✔
Neutral busbar
When wall mounting cable tray, ensure that - ANS-✔✔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 ______________ - ANS-✔✔to
keep moisture from creeping in
The outer covering on liquid-tight flexible metal conduit is use for - ANS-✔✔A moisture seal
,A good electrical connection should - ANS-✔✔Be mechanically and electrically secure
The symbol normally use for duplex - ANS-✔✔Circle with two parallel lines draw through it
Disconnecting means are covered in - ANS-✔✔NEC section 110-22
In relation to switches, the term throw refers to the - ANS-✔✔Number of internal operations that
switch can perform
A 3-phase, 4-wire, 480v service requires ________ current transformers - ANS-✔✔3
Services conductors and equipment are covered in - ANS-✔✔NEC Article 230
The NEC required that all receptacles installed on 25 amp and 20 amp branch circuits be__________
receptacles - ANS-✔✔Grounding
The circular mil is based on the - ANS-✔✔Cross-sectional area of the wire
A transformer with the primary of 400 turns and a secondary of 300 turns has a - ANS-✔✔Step down
turns ratio of 4:3
Of the termination classes listed below,_____ is the only one that provides a seal against external
elements - ANS-✔✔Class 1
Unless otherwise noted, the calculations in AC circuits ______ values - ANS-✔✔Rms
When the coil turns increased the ________ - ANS-✔✔Induced voltage is increased
,As the temperature surrounding a self regulating heating cable rises, the ________ - ANS-✔✔
Resistance of the polymeric core increases
The motor type that has the highest starting torque is the _________ motor - ANS-✔✔Capacitor - start
For a given number of poles, the________ determines the speed of an AC Motor. - ANS-✔✔Frequency
Both induction and synchronous motor operate on the principle of the rotating________field - ANS-✔
✔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 - ANS-✔✔90 Volts
The output capacity of a motor is rated in - ANS-✔✔Horsepower
The synchronous speed at witcha 4 pole, 60 Hz induction motor operates is ________ rpm - ANS-✔✔
1800
The sine of 0 degree is - ANS-✔✔0
In a AC circuit containing resistance only, _______ 12A will flow if the resistance is 10 ohms and the
voltage is 120V - ANS-✔✔12A
The _____ rotor types are generally rugged - ANS-✔✔Squirrel cage
The componente labeled 7 in figure 1 is a (an) - ANS-✔✔End seal
, Meters used in AC circuits indicate the_______ - ANS-✔✔Effective
Proofs tests are made at________ oF the original factory voltage - ANS-✔✔60%
Which type of heating cable can not be cut and terminated in the field? - ANS-✔✔Mineral insulated
The secondary of a CT under load should not be opened because of______ - ANS-✔✔Induced hight
voltage
In a transformer,______ - ANS-✔✔Electromagnetic induction occurs
When a ground rod is installed, the top of the rod must be positioned _____.grade - ANS-✔✔Flush with
or below
When making offset bends, the two kicks must be made perfectly parallel or the resulting offset will
have a ________ - ANS-✔✔Crooked bend
All of the following types of condulet may be used as a pulling point for conduit that requires a 90
degree change in direction, except_______ - ANS-✔✔C
To be effective, a grounding system must limit the voltage on the electrical system and protect it from
all of the following, except ______ - ANS-✔✔Undervoltage conditions
What is the most common service use in a temporary power panel? - ANS-✔✔120/240 volt, 1-phase, 3-
wire
