AC Motors MCQ’s

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This set of Mechatronics Multiple Choice Questions & Answers (MCQs) focuses on “AC Motors”.

1. The speed of the rotation of the stepper motor depends on ________
a) torque
b) number of input pulses
c) frequency of input pulses
d) solenoid

2. Stepper motors are extremely reliable.
a) True
b) False

3. Which type of device is a stepper motor?
a) Electromechanical
b) Electrochemical
c) Embedded system
d) Electromagnetic

4. Length of rotation is directly related to ____
a) Torque
b) Number of input pulses
c) Frequency of input pulses
d) Solenoid

5. A stepper motor is a bad choice whenever control movement is required.
a) True
b) False

6. Which type of stepper motors have low cost and low-resolution motor?
a) Permanent magnet stepper motor
b) Variable reluctance stepper motor
c) Hybrid stepper motor
d) DC motor

7. Which among the following is not the type of a stepper motor?
a) Variable reluctance
b) Permanent magnet
c) Hybrid
d) Variable magnet

8. A soft iron multi-toothed rotor and wound stator is present in ___
a) Permanent magnet stepper motor
b) Variable reluctance stepper motor
c) Hybrid stepper motor
d) DC motor

9. Which among the following is a property of hybrid stepper motor?
a) Contains a soft iron multi-toothed rotor
b) Low cost and low-resolution motor
c) The better performance provided with respect to step resolution
d) Provides an increased magnetic flux

10. What is the formula to calculate the step angle of a stepper motor?
a) (360*ph)/nph
b) (ph/nph)
c) (nph/ph)
d) (360*nph)/ph

11. Which of the following is not the main selection criterion of a stepper motor?
a) Resolution required
b) Drive mechanism component required
c) Torque required
d) Speed

12. What is the step angle of a hybrid stepper motor?
a) 0.9 degree to 3.6 degree
b) 0.9 degree to 7.0 degree
c) 0.1 degree to 1.0 degree
d) 1.0 degree to 0.9 degree

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