Electrician NCCER Exam Questions And Answers All Verified A+ Graded
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Course
NCCER Electrical
Institution
NCCER Electrical
Electrician NCCER Exam Questions And Answers All Verified A+ Graded
Which article of the NEC covers grounding? - ANS Article 250
What is a dropout plate? - ANS Metal plate with a curved surface for cable to follow as it passes from the tray
All of the following are common service volt...
Which article of the NEC covers grounding? - ANS Article 250
What is a dropout plate? - ANS Metal plate with a curved surface for cable to follow as it passes from
the tray
K
All of the following are common service voltages in the United States Except: - ANS 372/575 3-Phase,
4-wire
C
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
LO
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? - ANS 13.3 Amps
YC
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
D
The purpose of sealing cable ends when reels of cable are in storage is ______________ - ANS to keep
moisture from creeping in
U
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
ST
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
K
elements - ANS Class 1
Unless otherwise noted, the calculations in AC circuits ______ values - ANS Rms
C
When the coil turns increased the ________ - ANS Induced voltage is increased
LO
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
YC
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
D
primary. The voltage across the secondary is - ANS 90 Volts
The output capacity of a motor is rated in - ANS Horsepower
U
The synchronous speed at witcha 4 pole, 60 Hz induction motor operates is ________ rpm - ANS 1800
ST
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
K
When making offset bends, the two kicks must be made perfectly parallel or the resulting offset will have
a ________ - ANS Crooked bend
C
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
LO
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
YC
What are the 2 most common types of overcurrent protective devices? - ANS Circuit breakers and fuses
What instrument is use to perform an insulation resistance test on a 480 volt motor winding? - ANS
Megohmmeter
D
What is a seal installed in a run of conduit in a class I location? - ANS Prevent the passage of explosive
gases in the conduit
U
Which of the following is the correct formula for OHM's law? - ANS I=E/R
Which of the following testing instruments operated on the current transformer principle - ANS
ST
Clamp-on ammeter
A drowning showing a point A to point B hookup of conductors is called a - ANS Wiring diagram
What does HOA usually mean in a motor control circuit - ANS Hands of automatic
A120/208 Volt feeder consist of an 800 ft run of 500 kcmil aluminum wire in conduit. This feeder has 5%
voltage drop. What will the phase-toPhase voltage be at the load end - ANS 197.60 volts
What is voltage? - ANS electromotive force
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