# Stepper Motor MCQs with Answers

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)

#### 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).

#### 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

#### 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 SDrespectively, as shown in the above figure. How it can be rotated by angle of 45 degree?
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.

1. 0.9 degree
2. 3 degree
3. 0.5 degree
4. 1.8 degree

#### 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

#### 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

1. 10 degree
2. 20 degree
3. 30 degree
4. 40 degree

#### 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

1. 0.9 degree
2. 3 degree
3. 0.5 degree
4. 1.8 degree

#### 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.