Electrician NCCER Questions and
Answers Already Passed
Which article of the NEC covers grounding? ✔✔Article 250
What is a dropout plate? ✔✔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: ✔✔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-whatt
lamp what is the total connected load? ✔✔13.3 Amps
,The must be grounded in a bussed glutter if use as the main service equipmemt
✔✔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 liquid-tight flexible metal conduit is use for ✔✔A moisture seal
A good electrical connection should ✔✔Be mechanically and electrically secure
The symbol normally use for duplex ✔✔Circle with two parallel lines draw 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 switch
can perform
A 3-phase, 4-wire, 480v service requires _ current transformers ✔✔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
The circular mil is based on the ✔✔Cross-sectional area of the wire
A transformer with the primary of 400 turns and a secondary of 300 turns has a ✔✔Step down
turns ratio of 4:3
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 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 motor operate on the principle of the 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 ✔✔90 Volts
The output capacity of a motor is rated in ✔✔Horsepower
Answers Already Passed
Which article of the NEC covers grounding? ✔✔Article 250
What is a dropout plate? ✔✔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: ✔✔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-whatt
lamp what is the total connected load? ✔✔13.3 Amps
,The must be grounded in a bussed glutter if use as the main service equipmemt
✔✔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 liquid-tight flexible metal conduit is use for ✔✔A moisture seal
A good electrical connection should ✔✔Be mechanically and electrically secure
The symbol normally use for duplex ✔✔Circle with two parallel lines draw 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 switch
can perform
A 3-phase, 4-wire, 480v service requires _ current transformers ✔✔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
The circular mil is based on the ✔✔Cross-sectional area of the wire
A transformer with the primary of 400 turns and a secondary of 300 turns has a ✔✔Step down
turns ratio of 4:3
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 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 motor operate on the principle of the 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 ✔✔90 Volts
The output capacity of a motor is rated in ✔✔Horsepower
