ELECTRICAL NCCER 2023-2024TEST 289 CORRECT QUESTIONS AND VERIFIED
ANSWERS A GRADE
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 ANSWE-13.3 amps
The must be grounded in a bussed gutter if used as the main service equipment. - CORRECT ANSWE-
Neutral busbar
When wall mounting cable tray, ensure that - CORRECT ANSWE-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 ANSWE-To keep
moisture from creeping in
The outer covering on liguid-tight flexible metal conduit is used for - CORRECT ANSWE-A moisture seal
A good electrical connection should - CORRECT ANSWE-Be mechanically and electrically secure
The symbol normally used for duplex - CORRECT ANSWE-Circle with two parallel lines drawb through it
Disconnecting means are covered in - CORRECT ANSWE-NEC Section 110-22
In relation to switches, the term throw refers to the - CORRECT ANSWE-Number of internal operations
that a switch can perform
A 3-phase, 4-wire, 480v service requires ______ current transformer(s) - CORRECT ANSWE-3
Services conductors and equipment are covered in - CORRECT ANSWE-NEC Article 230
The NEC required that all receptacles installed on 25 amp and 20 amp branch circuits be ______
receptacles - CORRECT ANSWE-Grounding
A transformer with the primary of 400 turns and a secondary of 300 turns has a _____ - CORRECT
ANSWE-Step-down turns ratio of 4:3
The circular mil is based on the - CORRECT ANSWE-Cross-sectional area of the wire
,Which Article of the NEC covers grounding? - CORRECT ANSWE-article 250
Which of the following is a 90 degree, explosion proof fitting? - CORRECT ANSWE-GUAL
What is a dropout plate? - CORRECT ANSWE-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 ANSWE-372/575
3-PHASE, 4-WIRE
What does a GFCI breaker do? - CORRECT ANSWE-Opens a circuit to prevent operation of an electrical
device
What will happen when one or more coils in a winding are grounded? - CORRECT ANSWE-The motor will
automatically blow fuses
Of the termination classes listed below, ____ is the only one that provides a seal against external
elements. - CORRECT ANSWE-Class 1
Unless otherwise noted. the calculations in AC circuits _____ values. - CORRECT ANSWE-Rms
When the coil turns are increased the _____ - CORRECT ANSWE-Induced voltage is increased
As the temperature surrounding a self-regulating heating cable rises, the ____ - CORRECT ANSWE-
Resistance of the polymeric core increases
The motor type that has the highest starting torque is the ____ motor. - CORRECT ANSWE-Capacitor-start
For a given number of poles, the ____ determines the speed of an AC motor. - CORRECT ANSWE-Frequency
Both induction and synchronous motors operate on the principle of a rotating ____ field - CORRECT
ANSWE-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 ANSWE-90Volts
The output capacity of a motor is rated in - CORRECT ANSWE-Horsepower
The synchronous speed at which a pole, 60 Hz induction motor operates is rpm. - CORRECT ANSWE-1,800
, The sine of 0 degree is - CORRECT ANSWE-0
Meters used in AC circuits indicate the - CORRECT ANSWE-Effective
The component labeled 7 in figure 1 is a(n) - CORRECT ANSWE-End seal
In an AC circuit containing resistance only _____ will flow if the resistance is 10 ohms and the voltage is
120V. - CORRECT ANSWE-12A
The _____ rotor types are generally rugged. - CORRECT ANSWE-Squirrel cage
Proofs tests are made at_ of the original factory voltage. - CORRECT ANSWE-60%
Which type of heating cable cannot be cut and terminated in the field? - CORRECT ANSWE-Mineral
insulated
The secondary of a CT under load should not be opened because of_. - CORRECT ANSWE-Induced high
voltage
In a transformer ______ - CORRECT ANSWE-Electromagnetic Induction Ocurs
When a ground rod is installed, the top of the rod must be positioned ______ grade. - CORRECT ANSWE-
Flush with or below
When making offset bends, the two kicks must be made perfectly parallel or the resulting offset will have
a _____ - CORRECT ANSWE-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 _____ - CORRECT ANSWE-C
To be effective, a grounding system must limit the voltage on the electrical system and protect it from all
of the following, except _____ - CORRECT ANSWE-Undervoltage conditions
What is the MOST common service used in a temporary power panel? - CORRECT ANSWE-120/240 volt, 1-
phase, 3-wire
What are the 2 MOST common types of overcurrent protective devices? - CORRECT ANSWE-Circuit
breakers and fuses
ANSWERS A GRADE
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 ANSWE-13.3 amps
The must be grounded in a bussed gutter if used as the main service equipment. - CORRECT ANSWE-
Neutral busbar
When wall mounting cable tray, ensure that - CORRECT ANSWE-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 ANSWE-To keep
moisture from creeping in
The outer covering on liguid-tight flexible metal conduit is used for - CORRECT ANSWE-A moisture seal
A good electrical connection should - CORRECT ANSWE-Be mechanically and electrically secure
The symbol normally used for duplex - CORRECT ANSWE-Circle with two parallel lines drawb through it
Disconnecting means are covered in - CORRECT ANSWE-NEC Section 110-22
In relation to switches, the term throw refers to the - CORRECT ANSWE-Number of internal operations
that a switch can perform
A 3-phase, 4-wire, 480v service requires ______ current transformer(s) - CORRECT ANSWE-3
Services conductors and equipment are covered in - CORRECT ANSWE-NEC Article 230
The NEC required that all receptacles installed on 25 amp and 20 amp branch circuits be ______
receptacles - CORRECT ANSWE-Grounding
A transformer with the primary of 400 turns and a secondary of 300 turns has a _____ - CORRECT
ANSWE-Step-down turns ratio of 4:3
The circular mil is based on the - CORRECT ANSWE-Cross-sectional area of the wire
,Which Article of the NEC covers grounding? - CORRECT ANSWE-article 250
Which of the following is a 90 degree, explosion proof fitting? - CORRECT ANSWE-GUAL
What is a dropout plate? - CORRECT ANSWE-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 ANSWE-372/575
3-PHASE, 4-WIRE
What does a GFCI breaker do? - CORRECT ANSWE-Opens a circuit to prevent operation of an electrical
device
What will happen when one or more coils in a winding are grounded? - CORRECT ANSWE-The motor will
automatically blow fuses
Of the termination classes listed below, ____ is the only one that provides a seal against external
elements. - CORRECT ANSWE-Class 1
Unless otherwise noted. the calculations in AC circuits _____ values. - CORRECT ANSWE-Rms
When the coil turns are increased the _____ - CORRECT ANSWE-Induced voltage is increased
As the temperature surrounding a self-regulating heating cable rises, the ____ - CORRECT ANSWE-
Resistance of the polymeric core increases
The motor type that has the highest starting torque is the ____ motor. - CORRECT ANSWE-Capacitor-start
For a given number of poles, the ____ determines the speed of an AC motor. - CORRECT ANSWE-Frequency
Both induction and synchronous motors operate on the principle of a rotating ____ field - CORRECT
ANSWE-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 ANSWE-90Volts
The output capacity of a motor is rated in - CORRECT ANSWE-Horsepower
The synchronous speed at which a pole, 60 Hz induction motor operates is rpm. - CORRECT ANSWE-1,800
, The sine of 0 degree is - CORRECT ANSWE-0
Meters used in AC circuits indicate the - CORRECT ANSWE-Effective
The component labeled 7 in figure 1 is a(n) - CORRECT ANSWE-End seal
In an AC circuit containing resistance only _____ will flow if the resistance is 10 ohms and the voltage is
120V. - CORRECT ANSWE-12A
The _____ rotor types are generally rugged. - CORRECT ANSWE-Squirrel cage
Proofs tests are made at_ of the original factory voltage. - CORRECT ANSWE-60%
Which type of heating cable cannot be cut and terminated in the field? - CORRECT ANSWE-Mineral
insulated
The secondary of a CT under load should not be opened because of_. - CORRECT ANSWE-Induced high
voltage
In a transformer ______ - CORRECT ANSWE-Electromagnetic Induction Ocurs
When a ground rod is installed, the top of the rod must be positioned ______ grade. - CORRECT ANSWE-
Flush with or below
When making offset bends, the two kicks must be made perfectly parallel or the resulting offset will have
a _____ - CORRECT ANSWE-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 _____ - CORRECT ANSWE-C
To be effective, a grounding system must limit the voltage on the electrical system and protect it from all
of the following, except _____ - CORRECT ANSWE-Undervoltage conditions
What is the MOST common service used in a temporary power panel? - CORRECT ANSWE-120/240 volt, 1-
phase, 3-wire
What are the 2 MOST common types of overcurrent protective devices? - CORRECT ANSWE-Circuit
breakers and fuses
