Electrical NCCER Study Set with 280
detailed solutions.
Electrical NCCER Study Set with 280
detailed solutions.
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 Metal plate with a curved surface for cable to follow as it passes from the tray? - ANSWER
Dropout plate
Are not common service voltages in the United States - ANSWER 372/575 3-phase, 4-wire
Opens a circuit to prevent operation of an electrical device - ANSWER GFCI breaker
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 the building structure is ? - ANSWER Strong enough to
support the tray system
The purpose of sealing cable ends when reels of cable are in storage is to - ANSWER Keep moisture from
creeping in
,Electrical NCCER Study Set with 280
detailed solutions.
The outer covering on liquid-tight flexible metal conduit is used for - ANSWER A moisture seal
A good electrical connection should be - ANSWER Mechanically and electrically secure
The symbol normally used for duplex - ANSWER A circle with two parallel lines drawn through it
Disconnecting means are covered in? - ANSWER NEC section 110-22
In relation to switches the term throw refers to - ANSWER Number of internal operations that a switch
can preform
A 3-phase, 4-wire, 480v service requires_______ current transformers. - ANSWER 3
Services conductors and equipment are covered in - ANSWER NEC article 230
The NEC requires that all receptacles installed on 25 - ANSWER Grounding
The circular mil is based on the _______. - ANSWER Cross-sectional area of the wite
The circular mil is based on the _______? - ANSWER Cross-sectional area of the wire
A transformer with the primary of 400 turns and a secondary of 300 turns has a? - ANSWER Step down
turn ratio of 4:3
Of the termination classes listed below,______ is the only one that provides a seal against external
elements - ANSWER Class 1
Unless other wise noted, the calculations in AC circuits______ values. - ANSWER RMS (Root Mean
Square)
, Electrical NCCER Study Set with 280
detailed solutions.
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 frequancy
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 a 120VAC applied to the
primary. The voltage across the secondary is? - ANSWER 90 volts
The output capacity of a motor is rated in? - ANSWER Horse power
The synchronous speed at which a 4 pole, 60 Hz induction motor operates is ______ rpm. - ANSWER
1800
The sine of 0 degrees is ? - ANSWER 0
In Ana AC circuit containing resistance only,_______ will flow if the resistance is 10 ohms and the
voltage is 120v - ANSWER 12 amps
The_____ rotor types are generally rugged. - ANSWER Squirrel cage
Meters used in AC circuits indicate the _______. - ANSWER effectivness
detailed solutions.
Electrical NCCER Study Set with 280
detailed solutions.
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 Metal plate with a curved surface for cable to follow as it passes from the tray? - ANSWER
Dropout plate
Are not common service voltages in the United States - ANSWER 372/575 3-phase, 4-wire
Opens a circuit to prevent operation of an electrical device - ANSWER GFCI breaker
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 the building structure is ? - ANSWER Strong enough to
support the tray system
The purpose of sealing cable ends when reels of cable are in storage is to - ANSWER Keep moisture from
creeping in
,Electrical NCCER Study Set with 280
detailed solutions.
The outer covering on liquid-tight flexible metal conduit is used for - ANSWER A moisture seal
A good electrical connection should be - ANSWER Mechanically and electrically secure
The symbol normally used for duplex - ANSWER A circle with two parallel lines drawn through it
Disconnecting means are covered in? - ANSWER NEC section 110-22
In relation to switches the term throw refers to - ANSWER Number of internal operations that a switch
can preform
A 3-phase, 4-wire, 480v service requires_______ current transformers. - ANSWER 3
Services conductors and equipment are covered in - ANSWER NEC article 230
The NEC requires that all receptacles installed on 25 - ANSWER Grounding
The circular mil is based on the _______. - ANSWER Cross-sectional area of the wite
The circular mil is based on the _______? - ANSWER Cross-sectional area of the wire
A transformer with the primary of 400 turns and a secondary of 300 turns has a? - ANSWER Step down
turn ratio of 4:3
Of the termination classes listed below,______ is the only one that provides a seal against external
elements - ANSWER Class 1
Unless other wise noted, the calculations in AC circuits______ values. - ANSWER RMS (Root Mean
Square)
, Electrical NCCER Study Set with 280
detailed solutions.
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 frequancy
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 a 120VAC applied to the
primary. The voltage across the secondary is? - ANSWER 90 volts
The output capacity of a motor is rated in? - ANSWER Horse power
The synchronous speed at which a 4 pole, 60 Hz induction motor operates is ______ rpm. - ANSWER
1800
The sine of 0 degrees is ? - ANSWER 0
In Ana AC circuit containing resistance only,_______ will flow if the resistance is 10 ohms and the
voltage is 120v - ANSWER 12 amps
The_____ rotor types are generally rugged. - ANSWER Squirrel cage
Meters used in AC circuits indicate the _______. - ANSWER effectivness
