,Which Article of the NEC covers grounding? - CORRECT ANSWERS-article 250
Which of the following is a 90 degree, explosion proof fitting? - CORRECT ANSWERS-
GUAL
What is a dropout plate? - CORRECT ANSWERS-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: -
CORRECT ANSWERS-372/575 3-PHASE, 4-WIRE
What does a GFCI breaker do? - CORRECT ANSWERS-Opens a circuit to prevent
operation of an electrical device
What will happen when one or more coils in a winding are grounded? - CORRECT
ANSWERS-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? - CORRECT ANSWERS-13.3 amps
The must be grounded in a bussed gutter if used as the main service equipment. -
CORRECT ANSWERS-Neutral busbar
When wall mounting cable tray, ensure that - CORRECT ANSWERS-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 - CORRECT
ANSWERS-To keep moisture from creeping in
The outer covering on liguid-tight flexible metal conduit is used for - CORRECT
ANSWERS-A moisture seal
A good electrical connection should - CORRECT ANSWERS-Be mechanically and
electrically secure
The symbol normally used for duplex - CORRECT ANSWERS-Circle with two parallel
lines drawb through it
Disconnecting means are covered in - CORRECT ANSWERS-NEC Section 110-22
In relation to switches, the term throw refers to the - CORRECT ANSWERS-Number of
internal operations that a switch can perform
A 3-phase, 4-wire, 480v service requires ______ current transformer(s) - CORRECT
ANSWERS-3
, Services conductors and equipment are covered in - CORRECT ANSWERS-NEC
Article 230
The NEC required that all receptacles installed on 25 amp and 20 amp branch circuits
be ______ receptacles - CORRECT ANSWERS-Grounding
A transformer with the primary of 400 turns and a secondary of 300 turns has a _____ -
CORRECT ANSWERS-Step-down turns ratio of 4:3
The circular mil is based on the - CORRECT ANSWERS-Cross-sectional area of the
wire
Of the termination classes listed below, ____ is the only one that provides a seal
against external elements. - CORRECT ANSWERS-Class 1
Unless otherwise noted. the calculations in AC circuits _____ values. - CORRECT
ANSWERS-Rms
When the coil turns are increased the _____ - CORRECT ANSWERS-Induced voltage
is increased
As the temperature surrounding a self-regulating heating cable rises, the ____ -
CORRECT ANSWERS-Resistance of the polymeric core increases
The motor type that has the highest starting torque is the ____ motor. - CORRECT
ANSWERS-Capacitor-start
For a given number of poles, the ____ determines the speed of an AC motor. -
CORRECT ANSWERS-Frequency
Both induction and synchronous motors operate on the principle of a rotating ____ field
- CORRECT ANSWERS-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: - CORRECT ANSWERS-
90Volts
The output capacity of a motor is rated in - CORRECT ANSWERS-Horsepower
The synchronous speed at which a pole, 60 Hz induction motor operates is rpm. -
CORRECT ANSWERS-1,800
The sine of 0 degree is - CORRECT ANSWERS-0
Meters used in AC circuits indicate the - CORRECT ANSWERS-Effective
Which of the following is a 90 degree, explosion proof fitting? - CORRECT ANSWERS-
GUAL
What is a dropout plate? - CORRECT ANSWERS-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: -
CORRECT ANSWERS-372/575 3-PHASE, 4-WIRE
What does a GFCI breaker do? - CORRECT ANSWERS-Opens a circuit to prevent
operation of an electrical device
What will happen when one or more coils in a winding are grounded? - CORRECT
ANSWERS-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? - CORRECT ANSWERS-13.3 amps
The must be grounded in a bussed gutter if used as the main service equipment. -
CORRECT ANSWERS-Neutral busbar
When wall mounting cable tray, ensure that - CORRECT ANSWERS-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 - CORRECT
ANSWERS-To keep moisture from creeping in
The outer covering on liguid-tight flexible metal conduit is used for - CORRECT
ANSWERS-A moisture seal
A good electrical connection should - CORRECT ANSWERS-Be mechanically and
electrically secure
The symbol normally used for duplex - CORRECT ANSWERS-Circle with two parallel
lines drawb through it
Disconnecting means are covered in - CORRECT ANSWERS-NEC Section 110-22
In relation to switches, the term throw refers to the - CORRECT ANSWERS-Number of
internal operations that a switch can perform
A 3-phase, 4-wire, 480v service requires ______ current transformer(s) - CORRECT
ANSWERS-3
, Services conductors and equipment are covered in - CORRECT ANSWERS-NEC
Article 230
The NEC required that all receptacles installed on 25 amp and 20 amp branch circuits
be ______ receptacles - CORRECT ANSWERS-Grounding
A transformer with the primary of 400 turns and a secondary of 300 turns has a _____ -
CORRECT ANSWERS-Step-down turns ratio of 4:3
The circular mil is based on the - CORRECT ANSWERS-Cross-sectional area of the
wire
Of the termination classes listed below, ____ is the only one that provides a seal
against external elements. - CORRECT ANSWERS-Class 1
Unless otherwise noted. the calculations in AC circuits _____ values. - CORRECT
ANSWERS-Rms
When the coil turns are increased the _____ - CORRECT ANSWERS-Induced voltage
is increased
As the temperature surrounding a self-regulating heating cable rises, the ____ -
CORRECT ANSWERS-Resistance of the polymeric core increases
The motor type that has the highest starting torque is the ____ motor. - CORRECT
ANSWERS-Capacitor-start
For a given number of poles, the ____ determines the speed of an AC motor. -
CORRECT ANSWERS-Frequency
Both induction and synchronous motors operate on the principle of a rotating ____ field
- CORRECT ANSWERS-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: - CORRECT ANSWERS-
90Volts
The output capacity of a motor is rated in - CORRECT ANSWERS-Horsepower
The synchronous speed at which a pole, 60 Hz induction motor operates is rpm. -
CORRECT ANSWERS-1,800
The sine of 0 degree is - CORRECT ANSWERS-0
Meters used in AC circuits indicate the - CORRECT ANSWERS-Effective
