MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Control Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the step angle of a permanent-magnet stepper motor having 8 stator poles and 4 rotor poles? |
| A. | 60º |
| B. | 45º |
| C. | 30º |
| D. | 15º |
| Answer» C. 30º | |
| 2. |
A stepper motor may be considered as a ____________ converter. |
| A. | Dc to dc |
| B. | Ac to ac |
| C. | Dc to ac |
| D. | Digital-to-analogue |
| Answer» E. | |
| 3. |
If a hybrid stepper motor has a rotor pitch of 36º and a step angle of 9º, the number of its phases must be |
| A. | 4 |
| B. | 2 |
| C. | 3 |
| D. | 6 |
| Answer» B. 2 | |
| 4. |
A_STEPPER_MOTOR_MAY_BE_CONSIDERED_AS_A______________CONVERTER.?$ |
| A. | Dc to dc |
| B. | Ac to ac |
| C. | Dc to ac |
| D. | Digital-to-analogue |
| Answer» E. | |
| 5. |
What_is_the_step_angle_of_a_permanent-magnet_stepper_motor_having_8_stator_poles_and_4_rotor_poles?$ |
| A. | 60º |
| B. | 45º |
| C. | 30º |
| D. | 15º |
| Answer» C. 30¬¨¬®‚Äö√†¬¥ | |
| 6. |
Which of the following phase switching sequence represents half-step operation of a VR stepper motor ? |
| A. | A, B, C,A…….. |
| B. | A, C, B,A……. |
| C. | AB, BC, CA, AB…….. |
| D. | A, AB, B, BC…….. |
| Answer» E. | |
| 7. |
The rotational speed of a given stepper motor is determined solely by the |
| A. | Shaft load |
| B. | Step pulse frequency |
| C. | Polarity of stator current |
| D. | Magnitude of stator current. |
| Answer» C. Polarity of stator current | |
| 8. |
A stepping motor is a ____________ device. |
| A. | Mechanical |
| B. | Electrical |
| C. | Analogue |
| D. | Incremental |
| Answer» E. | |
| 9. |
The rotor of a stepper motor has no |
| A. | Windings |
| B. | Commutator |
| C. | Brushes |
| D. | All of the mentioned |
| Answer» E. | |
| 10. |
If a hybrid stepper motor has a rotor pitch of 36º and a step angle of 9º, the number of its phases must be$ |
| A. | 4 |
| B. | 2 |
| C. | 3 |
| D. | 6 |
| Answer» B. 2 | |
| 11. |
A stepper motor having a resolution of 300 steps/rev and running at 2400 rpm has a pulse rate of- pps. |
| A. | 4000 |
| B. | 8000 |
| C. | 6000 |
| D. | 10,000 |
| Answer» D. 10,000 | |
| 12. |
In a three-stack 12/8-pole VR motor, the rotor pole pitch is |
| A. | 15º |
| B. | 30º |
| C. | 45º |
| D. | 60º |
| Answer» D. 60¬¨¬®‚Äö√†¬¥ | |
| 13. |
A variable reluctance stepper motor is constructed of ______________ material with salient poles. |
| A. | Paramagnetic |
| B. | Ferromagnetic |
| C. | Diamagnetic |
| D. | Non-magnetic |
| Answer» C. Diamagnetic | |