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