Stepper Motor MCQs with Answers

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Stepper Motor MCQs with answers: Following Multiple Choice Questions (MCQs) are based on “Stepper Motor”.

Topics: Construction and Working of Stepper Motor, Types of stepper motor, Variable reluctance stepper motor, Hybrid stepper motor, Applications of stepper motors.

These are related to subject Electrical Machines or Basic Electrical Engineering. This topic is mostly beneficial in the field of Electronics, Electrical and Mechanical Engineering.

These MCQs will be useful in various competitive examinations, entrance examinations, oral examination (Viva voce), certifications and interviews.

MCQs on Stepper Motor

Que.1 Which of the following motor rotates in discrete angular steps?
  1. Servo motor
  2. DC motor
  3. Stepper motor
  4. Linear Induction Motor (LIM)

✔ View Answer

Option 3: Stepper motor

Que.2 Stepper motor runs in response to
  1. a programmed sequence of input electrical pulses.
  2. Pulse Width Modulation (PWM).
  3. feedback signal.
  4. Pulse Position Modulation (PPM).

✔ View Answer

Option 1: a programmed sequence of input electrical pulses.

Que.3 Rotor of a variable reluctance stepper motor is constructed of ________ material with salient poles.
  1. Ferromagnetic
  2. Diamagnetic
  3. Non-magnetic
  4. Paramagnetic

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Option 1: Ferromagnetic

Que.4 In VR stepper motor, if the four phases A, B, C, and D are connected to the DC source with the help of a semiconductor, switches SA, SB, SC, and SD respectively, as shown in the above figure. How it can be rotated by angle of 45 degree?
Variable reluctance stepping motor, MCQs on Steper Motor
  1. The phase windings of the stator are energized in the sequence A, B, C, D, A.
  2. By exciting the phase in the sequence A, A+B, B, B+C, C, C+ D, D, D+A, A.
  3. The phase windings of the stator are energized in the sequence A, D, C, B, A.
  4. None of the above.

✔ View Answer

Option 2: By exciting the phase in the sequence A, A+B, B, B+C, C, C+ D, D, D+A, A.

Que.5 A variable reluctance stepper motor has 8 main poles which have 5 teeth each. If rotor has 60 teeth, calculate the stepping angle.
  1. 0.9 degree
  2. 3 degree
  3. 0.5 degree
  4. 1.8 degree

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Option 2: 3 degree

Que.6 A stepper motor has a step angle of 2.50. Determine number of steps required for the shaft to make 25 revolutions.
  1. 3600
  2. 2500
  3. 144
  4. cannot be determined

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Option 1: 3600

Que.7 The stator and rotor of the ________ have the same number of poles and hence, the same pole pitch.
  1. Permanent Magnet stepper motor
  2. Single stack variable reluctance stepper motor
  3. Multi stack variable reluctance stepper motor
  4. Hybrid stepper motor

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Option 3: Multi stack variable reluctance stepper motor

Que.8 For a Multi stack variable reluctance stepper motor has 3 stacks, there are 12 stator and rotor poles in each stack. Calculate step angle.
  1. 10 degree
  2. 20 degree
  3. 30 degree
  4. 40 degree

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Option 1: 10 degree

Que.9 The _________ is a combination of the features of the Variable Reluctance Stepper Motor and Permanent Magnet Stepper Motor.
  1. Multi stack variable reluctance stepper motor
  2. Hybrid stepper motor
  3. Servo motor
  4. None of the above

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Option 2: Hybrid stepper motor

Que.10 A hybrid stepper motor has stator and rotor teeth 40 and 50 respectively, the step angle is _____.
  1. 0.9 degree
  2. 3 degree
  3. 0.5 degree
  4. 1.8 degree

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Option 4: 1.8 degree

Que.11 The rotational speed of a given stepper motor depends on
  1. Magnitude of supply voltage.
  2. Polarity of stator current.
  3. Magnitude of stator current.
  4. Step pulse frequency.

✔ View Answer

Option 4: Step pulse frequency.

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