1. For a stepper motor, which torque has the highest numerical value?
- Pull-out torque
- Pull-in torque
- Detent torque
- Holding torque
2. The step angle of the stepper motor is 2.5°. If the stepping frequency is 3600 pulses per second, then the shaft speed will be
- 3600 rps
- 144 rps
- 25 rps
- 2.5 rps
3. A 3-stack, variable reluctance step motor has 20 poles on each rotor and stator stack. The step angle of this step motor is
- 6°
- 30°
- 18°
- 90°
4. Which type of motor is most suitable for computer printer device?
- Reluctance motor
- Hysteresis motor
- Shaded pole motor
- Stepper motor
5. The stepper motor has six-phase winding on its stator and has 12 teeth on the rotor. The stepping angle is
- 5°
- 10°
- 2.5°
- 30°
6. A 4-phase, 4-pole permanent magnet stepper motor has a step angle of
- 90°
- 45°
- 22.5°
- 30°
7. The step angle for a 3-stack, 15 tooth variable reluctance stepper motor is
- 8°
- 4°
- 10.5°
- 7.5°
8. The step angle for a 3-phase, 24 pole permanent magnet stepper motor is
- 2°
- 5°
- 10.5°
- 15°
9. A single-stack, 8 phase (stator), multiple-step motor has 6 rotor teeth. The poles are excited one at a time. If excitation frequency is 120 Hz, the speed of the motor is
- 3 rps
- 5 rps
- 10 rps
- 15 rps
10. A permanent magnet stepper motor with 8 poles in the stator and 6 poles in the rotor will have a step angle of
- 7.5°
- 15°
- 10.5°
- 60°
11. Which one among the following has the highest numerical value in a stepper motor?
- Detent torque
- Holding torque
- Dynamic torque
- Ripple torque
12. Stepper motors are widely used because of
- wide speed range
- large rating
- no need for field control
- compatibility with digital systems
13. For a stepper motor, what is the correct relationship between the maximum slew rate (MSR) and the load?
- MSR decreases as load is reduced.
- MSR increases considerably as load is increased.
- MSR increases as load is reduced.
- MSR remains the same even if the load is changed.
