NCCER ELECTRICAL MODULE 2 LEVEL 2
MOTORS THEORY AND APPLICATION
COMPREHENSIVE EXAM 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◉ Armature. Answer: The rotating windings of a DC motor.
◉ Commutator. Answer: A device used on electric motors or generators
to maintain a unidirectional current.
◉ Torque. Answer: _____ is produced by mounting a loop in a fixed
magnetic field and as long as the fields of the magnet and armature
interact.
◉ horsepower. Answer: The rated output capacity of the motor. It is
based on breakdown torque, which is the maximum torque a motor will
develop without an abrupt drop in speed.
◉ magnetic field. Answer: A _____ is produced by the fields poles, and
a loop of wire in the armature turns and cuts this magnetic field.
◉ Horsepower: (Equation). Answer: Watts/746
, ◉ Types of DC motors. Answer: Shunt
Series
Compound
◉ Types of AC motors. Answer: Synchronous and Induction (Single and
Polyphase)
◉ Periodic duty: (Definition). Answer: Intermittent operation at a
substantially constant load for a short and definitely specified time.
◉ Revolutions per minute (rpm). Answer: The approximate full-load
speed at the rated power line frequency. The speed of a motor is
determined by the number of poles in the winding.
◉ Rotation. Answer: For single-phase motors, the standard rotation,
unless otherwise noted, is counterclockwise facing the lead or opposite
shaft end. All motors can be reconnected at the terminal board for
opposite rotation unless other wise indicated.
◉ Synchronous speed. Answer: The speed of the revolving field of the
stator, which is dependent on the supply frequency and number of poles
in a stator winding.
◉ Field poles. Answer: The stationary portion of a DC motor that
produces the magnetic field.
MOTORS THEORY AND APPLICATION
COMPREHENSIVE EXAM 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◉ Armature. Answer: The rotating windings of a DC motor.
◉ Commutator. Answer: A device used on electric motors or generators
to maintain a unidirectional current.
◉ Torque. Answer: _____ is produced by mounting a loop in a fixed
magnetic field and as long as the fields of the magnet and armature
interact.
◉ horsepower. Answer: The rated output capacity of the motor. It is
based on breakdown torque, which is the maximum torque a motor will
develop without an abrupt drop in speed.
◉ magnetic field. Answer: A _____ is produced by the fields poles, and
a loop of wire in the armature turns and cuts this magnetic field.
◉ Horsepower: (Equation). Answer: Watts/746
, ◉ Types of DC motors. Answer: Shunt
Series
Compound
◉ Types of AC motors. Answer: Synchronous and Induction (Single and
Polyphase)
◉ Periodic duty: (Definition). Answer: Intermittent operation at a
substantially constant load for a short and definitely specified time.
◉ Revolutions per minute (rpm). Answer: The approximate full-load
speed at the rated power line frequency. The speed of a motor is
determined by the number of poles in the winding.
◉ Rotation. Answer: For single-phase motors, the standard rotation,
unless otherwise noted, is counterclockwise facing the lead or opposite
shaft end. All motors can be reconnected at the terminal board for
opposite rotation unless other wise indicated.
◉ Synchronous speed. Answer: The speed of the revolving field of the
stator, which is dependent on the supply frequency and number of poles
in a stator winding.
◉ Field poles. Answer: The stationary portion of a DC motor that
produces the magnetic field.
