1
NCCER ELECTRICAL LEVEL 2 MODULE 2
MOTORS: THEORY AND APPLICATION EXAM
TEST QUESTIONS AND ANSWERS NEW
MODIFIED TESTED AND APPROVED 2026 NEW
UPDATE
Types of DC motors --CORRECT ANSWER--Shunt
Series
Compound
Types of AC motors --CORRECT ANSWER--Synchronous and
Induction (Single and Polyphase)
Periodic duty: (Definition) --CORRECT ANSWER--Intermittent
operation at a substantially constant load for a short and definitely
specified time.
Revolutions per minute (rpm) --CORRECT 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.
, 2
Rotation --CORRECT 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 --CORRECT 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 --CORRECT ANSWER--The stationary portion of a DC
motor that produces the magnetic field.
How DC motors operate? --CORRECT ANSWER--Magnetic lines of
force are continuous and always form closed loops; Magnetic lines of
force do not cross.
Armature --CORRECT ANSWER--The rotating windings of a DC
motor.
, 3
Commutator --CORRECT ANSWER--A device used on electric
motors or generators to maintain a unidirectional current.
Torque --CORRECT 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 --CORRECT 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 --CORRECT ANSWER--A _____ is produced by the
fields poles, and a loop of wire in the armature turns and cuts this
magnetic field.
Horsepower: (Equation) --CORRECT ANSWER--Watts/746
The principle reason for developing the brushless DC motor was to
___. --CORRECT ANSWER--eliminate commutator problems
NCCER ELECTRICAL LEVEL 2 MODULE 2
MOTORS: THEORY AND APPLICATION EXAM
TEST QUESTIONS AND ANSWERS NEW
MODIFIED TESTED AND APPROVED 2026 NEW
UPDATE
Types of DC motors --CORRECT ANSWER--Shunt
Series
Compound
Types of AC motors --CORRECT ANSWER--Synchronous and
Induction (Single and Polyphase)
Periodic duty: (Definition) --CORRECT ANSWER--Intermittent
operation at a substantially constant load for a short and definitely
specified time.
Revolutions per minute (rpm) --CORRECT 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.
, 2
Rotation --CORRECT 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 --CORRECT 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 --CORRECT ANSWER--The stationary portion of a DC
motor that produces the magnetic field.
How DC motors operate? --CORRECT ANSWER--Magnetic lines of
force are continuous and always form closed loops; Magnetic lines of
force do not cross.
Armature --CORRECT ANSWER--The rotating windings of a DC
motor.
, 3
Commutator --CORRECT ANSWER--A device used on electric
motors or generators to maintain a unidirectional current.
Torque --CORRECT 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 --CORRECT 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 --CORRECT ANSWER--A _____ is produced by the
fields poles, and a loop of wire in the armature turns and cuts this
magnetic field.
Horsepower: (Equation) --CORRECT ANSWER--Watts/746
The principle reason for developing the brushless DC motor was to
___. --CORRECT ANSWER--eliminate commutator problems
