The electrical NCCER test Questions & Answers Latest Update
The electrical NCCER test Questions & Answers
Latest Update
Terms in this set (289)
Which Article of the NEC covers article 250
grounding?
Which of the following is a 90 degree, GUAL
explosion proof fitting?
What is a dropout plate? Metal plate with a curved surface for cable to follow as it passes from the tray
All of the following are common service 372/575 3-PHASE, 4-WIRE
voltages in the United States EXCEPT:
What does a GFCI breaker do? Opens a circuit to prevent operation of an electrical device
What will happen when one or more coils The motor will automatically blow fuses
in a winding are grounded?
Eight incandescent lighting fixtures are to 13.3 amps
be installed. Each fixture is 120- volts, with
a 200-watt lamp. What is the total
connected load?
The must be grounded in a bussed gutter Neutral busbar
if used as the main service equipment.
When wall mounting cable tray, ensure The building structure is strong enough to support the tray system
that
The purpose of sealing cable ends when To keep moisture from creeping in
reels of cable are in storage is
The outer covering on liguid-tight flexible A moisture seal
metal conduit is used for
A good electrical connection should Be mechanically and electrically secure
The symbol normally used for duplex Circle with two parallel lines drawb through it
®™ 1
,The electrical NCCER test Questions & Answers Latest Update
Disconnecting means are covered in NEC Section 110-22
In relation to switches, the term throw Number of internal operations that a switch can perform
refers to the
A 3-phase, 4-wire, 480v service requires 3
_ __ current transformer(s)
Services conductors and equipment are NEC Article 230
covered in
The NEC required that all receptacles Grounding
installed on 25 amp and 20 amp branch
circuits be ___ receptacles
A transformer with the primary of 400 Step-down turns ratio of 4:3
turns and a secondary of 300 turns has a
_____
The circular mil is based on the Cross-sectional area of the wire
Of the termination classes listed below, Class 1
____ is the only one that provides a seal
against external elements.
Unless otherwise noted. the calculations Rms
in AC circuits __ values.
When the coil turns are increased the _____ Induced voltage is increased
As the temperature surrounding a self- Resistance of the polymeric core increases
regulating heating cable rises, the ____
The motor type that has the highest Capacitor-start
starting torque is the_motor.
For a given number of poles, the ____ Frequency
determines the speed of an AC motor.
Both induction and synchronous motors Magnetic
operate on the principle of a rotating ____
field
A transformer has 200 turns in the 90Volts
primary, 150 turns in the secondary, and
120VAC applied to the primary. The
voltage across the secondary is:
The output capacity of a motor is rated in Horsepower
The synchronous speed at which a pole, 1,800
60 Hz induction motor operates is rpm.
The sine of 0 degree is 0
Meters used in AC circuits indicate the Effective
The component labeled 7 in figure 1 is End seal
a(n)
In an AC circuit containing resistance only 12A
_ _ will flow if the resistance is 10 ohms
and the voltage is 120V.
®™ 2
, The electrical NCCER test Questions & Answers Latest Update
The ___ rotor types are generally rugged. Squirrel cage
Proofs tests are made at_ of the original 60%
factory voltage.
Which type of heating cable cannot be Mineral insulated
cut and terminated in the field?
The secondary of a CT under load should Induced high voltage
not be opened because of_.
In a transformer ______ Electromagnetic Induction Ocurs
When a ground rod is installed, the top of Flush with or below
the rod must be positioned __ grade.
When making offset bends, the two kicks Crooked Bend
must be made perfectly parallel or the
resulting offset will have a _____
conduit that requires a 90 degree change C
in direction, except 42.All of the following
types of condulet may be used as a
pulling point for _____
To be effective, a grounding system must Undervoltage conditions
limit the voltage on the electrical system
and protect it from all of the following,
except _____
What is the MOST common service used 120/240 volt, 1-phase, 3-wire
in a temporary power panel?
What are the 2 MOST common types of Circuit breakers and fuses
overcurrent protective devices?
What instrument is used to perform an Megohmmeter
insulation-resistance test on a 480- volt
motor winding?
Why is a seal installed in a run of conduit Prevent the passage of explosive gases in the conduit
in a Class I location?
Which of the following is the correct I=E/R
formula for OHM's law?
Which of the following testing instruments Clamp-on ammeter
operated on the current transformer
principle?
A 120/208 volt feeder consists of an 800 ft 197.60 volts
run of 500 kcmil aluminum wire in conduit.
This feeder has 5% voltage drop. What will
the phase-to-phase voltage be at the
load end?
What is voltage? Electromotive force
A drawing showing a point A to point B Wiring diagram
hookup of conductors is called a
®™ 3
The electrical NCCER test Questions & Answers
Latest Update
Terms in this set (289)
Which Article of the NEC covers article 250
grounding?
Which of the following is a 90 degree, GUAL
explosion proof fitting?
What is a dropout plate? Metal plate with a curved surface for cable to follow as it passes from the tray
All of the following are common service 372/575 3-PHASE, 4-WIRE
voltages in the United States EXCEPT:
What does a GFCI breaker do? Opens a circuit to prevent operation of an electrical device
What will happen when one or more coils The motor will automatically blow fuses
in a winding are grounded?
Eight incandescent lighting fixtures are to 13.3 amps
be installed. Each fixture is 120- volts, with
a 200-watt lamp. What is the total
connected load?
The must be grounded in a bussed gutter Neutral busbar
if used as the main service equipment.
When wall mounting cable tray, ensure The building structure is strong enough to support the tray system
that
The purpose of sealing cable ends when To keep moisture from creeping in
reels of cable are in storage is
The outer covering on liguid-tight flexible A moisture seal
metal conduit is used for
A good electrical connection should Be mechanically and electrically secure
The symbol normally used for duplex Circle with two parallel lines drawb through it
®™ 1
,The electrical NCCER test Questions & Answers Latest Update
Disconnecting means are covered in NEC Section 110-22
In relation to switches, the term throw Number of internal operations that a switch can perform
refers to the
A 3-phase, 4-wire, 480v service requires 3
_ __ current transformer(s)
Services conductors and equipment are NEC Article 230
covered in
The NEC required that all receptacles Grounding
installed on 25 amp and 20 amp branch
circuits be ___ receptacles
A transformer with the primary of 400 Step-down turns ratio of 4:3
turns and a secondary of 300 turns has a
_____
The circular mil is based on the Cross-sectional area of the wire
Of the termination classes listed below, Class 1
____ is the only one that provides a seal
against external elements.
Unless otherwise noted. the calculations Rms
in AC circuits __ values.
When the coil turns are increased the _____ Induced voltage is increased
As the temperature surrounding a self- Resistance of the polymeric core increases
regulating heating cable rises, the ____
The motor type that has the highest Capacitor-start
starting torque is the_motor.
For a given number of poles, the ____ Frequency
determines the speed of an AC motor.
Both induction and synchronous motors Magnetic
operate on the principle of a rotating ____
field
A transformer has 200 turns in the 90Volts
primary, 150 turns in the secondary, and
120VAC applied to the primary. The
voltage across the secondary is:
The output capacity of a motor is rated in Horsepower
The synchronous speed at which a pole, 1,800
60 Hz induction motor operates is rpm.
The sine of 0 degree is 0
Meters used in AC circuits indicate the Effective
The component labeled 7 in figure 1 is End seal
a(n)
In an AC circuit containing resistance only 12A
_ _ will flow if the resistance is 10 ohms
and the voltage is 120V.
®™ 2
, The electrical NCCER test Questions & Answers Latest Update
The ___ rotor types are generally rugged. Squirrel cage
Proofs tests are made at_ of the original 60%
factory voltage.
Which type of heating cable cannot be Mineral insulated
cut and terminated in the field?
The secondary of a CT under load should Induced high voltage
not be opened because of_.
In a transformer ______ Electromagnetic Induction Ocurs
When a ground rod is installed, the top of Flush with or below
the rod must be positioned __ grade.
When making offset bends, the two kicks Crooked Bend
must be made perfectly parallel or the
resulting offset will have a _____
conduit that requires a 90 degree change C
in direction, except 42.All of the following
types of condulet may be used as a
pulling point for _____
To be effective, a grounding system must Undervoltage conditions
limit the voltage on the electrical system
and protect it from all of the following,
except _____
What is the MOST common service used 120/240 volt, 1-phase, 3-wire
in a temporary power panel?
What are the 2 MOST common types of Circuit breakers and fuses
overcurrent protective devices?
What instrument is used to perform an Megohmmeter
insulation-resistance test on a 480- volt
motor winding?
Why is a seal installed in a run of conduit Prevent the passage of explosive gases in the conduit
in a Class I location?
Which of the following is the correct I=E/R
formula for OHM's law?
Which of the following testing instruments Clamp-on ammeter
operated on the current transformer
principle?
A 120/208 volt feeder consists of an 800 ft 197.60 volts
run of 500 kcmil aluminum wire in conduit.
This feeder has 5% voltage drop. What will
the phase-to-phase voltage be at the
load end?
What is voltage? Electromotive force
A drawing showing a point A to point B Wiring diagram
hookup of conductors is called a
®™ 3
