• Electrical Engineering Reference

# AC Motor - Electric Drives MCQs

AC Motor MCQs : This section focuses on the "AC 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 an electric motor driven by an alternating current

A. DC motor
B. AC motor
C. Both A and B
D. None of the above

Question 2

The AC motor commonly consists of _______ basic parts.

A. 1
B. 2
C. 3
D. 4

Question 3

Which of the following is a types of AC motors?

A. induction motors
B. synchronous motors
C. asynchronous motors
D. Both A and B

Question 4

Alternating current technology was rooted by Michael Faraday's and Joseph Henry's in?

A. 1830
B. 1840
C. 1845
D. 1850

Question 5

The difference between synchronous speed and actual speed is called?

A. Polyphase cage rotor
B. Polyphase wound rotor
C. Slip
D. Rotor

Question 6

A typical two-phase AC servo-motor has a squirrel cage rotor and a field consisting of two windings

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

Question 7

Calculate peak-peak voltage if Vmax=80 V and Vmin=20 V.

A. 40V
B. 50V
C. 60V
D. 70V

Question 8

Length of rotation is directly related to ____

A. Torque
B. Number of input pulses
C. Frequency of input pulses
D. Solenoid

Question 9

Which among the following is not the type of a stepper motor?

A. Variable reluctance
B. Permanent magnet
C. Hybrid
D. Variable magnet

Question 10

Single-phase motors have a unique rotating magnetic field like multi-phase motors.

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