Electrician NCCER Test (Electrical Study Guide) All 25 Pages Questions and Answers 100% Guaranteed Pass
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Course
NCCER Electrical
Institution
NCCER Electrical
Electrician NCCER Test (Electrical Study Guide) All 25 Pages Questions and Answers 100% Guaranteed Pass
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...
Electrician NCCER Test (Electrical Study
Guide) All 25 Pages Questions and
Answers 100% Guaranteed Pass
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
A
it passes from the tray
VI
All of the following are common service voltages in the United States Except: - ANS
372/575 3-Phase, 4-wire
TU
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
IS
motor will automatically blow fuses
eight incandescent lighting fixtures are to be installed. Each fixture is 120 volts, with a
OM
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
NA
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
JP
______________ - 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
A
The NEC required that all receptacles installed on 25 amp and 20 amp branch circuits
be__________ receptacles - ANS Grounding
VI
The circular mil is based on the - ANS Cross-sectional area of the wire
TU
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
IS
against external elements - ANS Class 1
Unless otherwise noted, the calculations in AC circuits ______ values - ANS Rms
OM
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
NA
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. -
JP
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
A
The _____ rotor types are generally rugged - ANS Squirrel cage
VI
The componente labeled 7 in figure 1 is a (an) - ANS End seal
Meters used in AC circuits indicate the_______ - ANS Effective
TU
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
IS
insulated
The secondary of a CT under load should not be opened because of______ - ANS
OM
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 -
NA
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
JP
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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