ELECTRICAL FUNDAMENTALS 2 FINAL EXAM |
COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS | LATEST UPDATE (2026) |
ALREADY GRADED A+
The two principal parts of an AC induction motor are the: - CORRECT ANSWER-
Rotor and stator.
The part of an AC induction motor that turns is called: - CORRECT ANSWER-Rotor
How does the rotor of an AC induction motor receive current? - CORRECT
ANSWER-Rotor current is induced by the rotor magnetic field.
Compared to the stator's magnetic field, the rotor's magnetic field is: - CORRECT
ANSWER-Opposite in polarity.
The rotor consists of: - CORRECT ANSWER-Aluminum bars mounted on a
laminated soft iron core.
The rotor turns because of: - CORRECT ANSWER-The repulsion and attraction
between the poles of the rotor and stator.
The magnetic field of the stator is: - CORRECT ANSWER-Opposite in polarity as the
rotor magnetic field.
,The most common type of single-phase motor used in HVACR equipment is: -
CORRECT ANSWER-Permanent split capacitor (PSC).
All single-phase motors need to create an additional magnetic field that: -
CORRECT ANSWER-Is out of phase with the magnetic field of the main winding to
get the motor started.
This type of AC motor is characterized by low starting torque and is suitable for light
applications such as refrigerator evaporator motors. - CORRECT ANSWER-Shaded
pole
What is the primary purpose of the run capacitor? - CORRECT ANSWER-To
increase the motor efficiency
What is the primary purpose of the start capacitor? - CORRECT ANSWER-To
increase the motor starting torque
The start capacitor for fractional horsepower, open-type capacitor start motors is
removed from the circuit by: - CORRECT ANSWER-A centrifugal switch
The run capacitor of a permanent split capacitor (PSC) motor: - CORRECT
ANSWER-Remains in the circuit while the motor operates.
The start capacitor is removed from the circuit of a CSCR compressor by: -
CORRECT ANSWER-A potential starting relay
, AC induction motor speed is determined by the current frequency (Hz) and the
number of: - CORRECT ANSWER-Motor poles
The twisting force that must be developed by a motor to turn its load is called: -
CORRECT ANSWER-Torque
The speed of an AC induction motor is determined by: - CORRECT ANSWER-The
number of poles and the frequency of the alternating current.
When operated with the same power source, which induction motor will have a
higher RPM: a four-pole motor or a six-pole motor? - CORRECT ANSWER-The four-
pole motor will turn faster.
A technician has installed a new three-phase motor, but it is running in reverse.
What should she do to correct the rotation? - CORRECT ANSWER-Reverse two
motor power supply leads.
To reverse the rotation of a three-phase motor: - CORRECT ANSWER-Reverse any
two power legs going to the motor.
A major difference between three-phase motors and single-phase motors is that: -
CORRECT ANSWER-Three-phase motors do not need any type of starting
components.
The two common winding configurations for three-phase motors are: - CORRECT
ANSWER-Wye and delta
COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS | LATEST UPDATE (2026) |
ALREADY GRADED A+
The two principal parts of an AC induction motor are the: - CORRECT ANSWER-
Rotor and stator.
The part of an AC induction motor that turns is called: - CORRECT ANSWER-Rotor
How does the rotor of an AC induction motor receive current? - CORRECT
ANSWER-Rotor current is induced by the rotor magnetic field.
Compared to the stator's magnetic field, the rotor's magnetic field is: - CORRECT
ANSWER-Opposite in polarity.
The rotor consists of: - CORRECT ANSWER-Aluminum bars mounted on a
laminated soft iron core.
The rotor turns because of: - CORRECT ANSWER-The repulsion and attraction
between the poles of the rotor and stator.
The magnetic field of the stator is: - CORRECT ANSWER-Opposite in polarity as the
rotor magnetic field.
,The most common type of single-phase motor used in HVACR equipment is: -
CORRECT ANSWER-Permanent split capacitor (PSC).
All single-phase motors need to create an additional magnetic field that: -
CORRECT ANSWER-Is out of phase with the magnetic field of the main winding to
get the motor started.
This type of AC motor is characterized by low starting torque and is suitable for light
applications such as refrigerator evaporator motors. - CORRECT ANSWER-Shaded
pole
What is the primary purpose of the run capacitor? - CORRECT ANSWER-To
increase the motor efficiency
What is the primary purpose of the start capacitor? - CORRECT ANSWER-To
increase the motor starting torque
The start capacitor for fractional horsepower, open-type capacitor start motors is
removed from the circuit by: - CORRECT ANSWER-A centrifugal switch
The run capacitor of a permanent split capacitor (PSC) motor: - CORRECT
ANSWER-Remains in the circuit while the motor operates.
The start capacitor is removed from the circuit of a CSCR compressor by: -
CORRECT ANSWER-A potential starting relay
, AC induction motor speed is determined by the current frequency (Hz) and the
number of: - CORRECT ANSWER-Motor poles
The twisting force that must be developed by a motor to turn its load is called: -
CORRECT ANSWER-Torque
The speed of an AC induction motor is determined by: - CORRECT ANSWER-The
number of poles and the frequency of the alternating current.
When operated with the same power source, which induction motor will have a
higher RPM: a four-pole motor or a six-pole motor? - CORRECT ANSWER-The four-
pole motor will turn faster.
A technician has installed a new three-phase motor, but it is running in reverse.
What should she do to correct the rotation? - CORRECT ANSWER-Reverse two
motor power supply leads.
To reverse the rotation of a three-phase motor: - CORRECT ANSWER-Reverse any
two power legs going to the motor.
A major difference between three-phase motors and single-phase motors is that: -
CORRECT ANSWER-Three-phase motors do not need any type of starting
components.
The two common winding configurations for three-phase motors are: - CORRECT
ANSWER-Wye and delta
