• Electrical Engineering Reference

# DC Motor - Electric Drives MCQs

DC Motor MCQs : This section focuses on the "DC Motor" in Electric Drives. These Multiple Choice Questions (MCQ) should be practiced to improve the Electric Drives skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

___________ is any of a class of rotary electrical motors that converts direct current electrical energy into mechanical energy

A. AC Motor
B. DC Motor
C. KC Motor
D. All of the above

Question 2

A ________________ has a magnetic field along the axis of rotation and an electric current that at some point is not parallel to the magnetic field.

A. ball bearing motor
B. bearing motor
C. homopolar motor
D. induction motor

Question 3

A ball bearing motor is an unusual electric motor that consists of ________ ball bearing-type bearings

A. 2
B. 3
C. 4
D. 5

Question 4

The PWM control of DC motor varies _________

A. inversely with speed
B. parabolically with speed
C. linearly with speed
D. exponentially with speed

Question 5

A series DC motor connects the armature and field windings in series with a common D.C. power source

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

Question 6

Ward-Leonard system of system of speed control is not recommended for _________

A. Wide speed
B. frequent-motor reversed
C. very slow speed
D. constant speed operation

Question 7

At a very low speed, increase in field resistance will _________

A. increase the speed of motor
B. decrease the speed of motor
C. not have signicant effect on speed
D. no effect

Question 8

How many types of electrical connections between the stator and rotor possible for DC electric motors?

A. 0
B. 1
C. 2
D. 3

Question 9

A series motor should be started at no load.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

Question 10

A shunt DC motor connects the armature and field windings in parallel or shunt with a common D.C. power source

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say