MOTORS THEORY AND APPLICATION ACTUAL
EXAM PAPER 2026 QUESTIONS WITH
SOLUTIONS GRADED A+
◉ Armature: (Definition). Answer: The rotating windings of a DC
motor.
◉ The ____ is a movable electromagnet located between the poles of
another fixed permanent (field) magnet as shown. Answer: Armature
◉ A twisting force called ______ must be developed. _____ is produced
by mounting a loop in a fixed magnetic field and as long as the fields of
the magnet and armature interact. Answer: Torque
◉ Commentator: (Definition). Answer: A device used on electric motors
or generators to maintain a unidirectional current.
◉ In the neutral plane, no ____ is produced and the rotation of the
armature should stop. Answer: Torque
, ◉ A _____ is produced by the fields poles, and a loop of wire in the
armature turns and cuts this magnetic field. Answer: Magnetic field
◉ CEMF. Answer: Counter electromotive force (CEMF)
◉ Horsepower: (Definition). 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.
◉ Horsepower: (Equation). Answer: Hp= 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): (Definition). 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.