MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Electric Drives knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Calculate the value of the frequency if the time period of the signal is .2 sec. |
| A. | 5 Hz |
| B. | 4 Hz |
| C. | 2 Hz |
| D. | 3 Hz |
| Answer» B. 4 Hz | |
| 2. |
DC series motor cannot run under no load. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Calculate the value of the frequency of the AC supply in India. |
| A. | 0 Hz |
| B. | 50 Hz |
| C. | 49 Hz |
| D. | 60 Hz |
| Answer» C. 49 Hz | |
| 4. |
Calculate the value of the duty cycle if the system is on for 5 sec and off for inf sec. |
| A. | 0 |
| B. | .4 |
| C. | .2 |
| D. | .1 |
| Answer» B. .4 | |
| 5. |
Calculate the power factor angle during the resonance condition. |
| A. | 0 |
| B. | 10 |
| C. | 80 |
| D. | 90 |
| Answer» E. | |
| 6. |
In a DC shunt motor, the e.m.f developed is proportional to ___________ |
| A. | I<sub>a</sub> |
| B. | I<sub>a</sub><sup>2</sup> |
| C. | I<sub>a</sub><sup>3</sup> |
| D. | I<sub>a</sub><sup>o</sup> |
| Answer» E. | |
| 7. |
The slope of the V-I curve is 13.89 . Calculate the value of resistance. |
| A. | .247 |
| B. | .345 |
| C. | .231 |
| D. | .222 |
| Answer» B. .345 | |
| 8. |
Calculate the value of the time period if the frequency of the signal is .07 sec. |
| A. | 14.28 sec |
| B. | 14.31 sec |
| C. | 14.23 sec |
| D. | 14.78 sec |
| Answer» B. 14.31 sec | |
| 9. |
In a DC series motor, the e.m.f developed is proportional to _______ |
| A. | N I<sub>a</sub> |
| B. | N I<sub>a</sub><sup>2</sup> |
| C. | N I<sub>a</sub><sup>3</sup> |
| D. | N I<sub>a</sub><sup>.5</sup> |
| Answer» B. N I<sub>a</sub><sup>2</sup> | |
| 10. |
The most suitable control-motor application is __________ |
| A. | AC shunt motor |
| B. | DC separately motor |
| C. | AC one-phase induction motor |
| D. | DC shunt motor |
| Answer» C. AC one-phase induction motor | |
| 11. |
Calculate the moment of inertia of the sphere having a mass of 8.4 kg and radius of 61 cm. |
| A. | 3.124 kgm<sup>2</sup> |
| B. | 3.125 kgm<sup>2</sup> |
| C. | 4.545 kgm<sup>2</sup> |
| D. | 5.552 kgm<sup>2</sup> |
| Answer» C. 4.545 kgm<sup>2</sup> | |
| 12. |
The unit of voltage is Pascal. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
The generated e.m.f from 4-pole armature having 1 conductors driven at 1 rev/sec having flux per pole as 10 Wb, with wave winding is ___________ |
| A. | 30 V |
| B. | 40 V |
| C. | 70 V |
| D. | 20 V |
| Answer» E. | |
| 14. |
In the chopper circuit, commutation times are _______ |
| A. | Current commutation is equal to voltage commutation |
| B. | Current commutation is less as compared to that of voltage commutation |
| C. | Current commutation is more as compared to that of voltage commutation |
| D. | Both commutation techniques are not comparable |
| Answer» C. Current commutation is more as compared to that of voltage commutation | |