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 St...
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
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