MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
In a DC shunt motor, the electromagnetic torque 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>.5</sup> |
| Answer» B. I<sub>a</sub><sup>2</sup> | |
| 2. |
The slope of the V-I curve is 90 . Calculate the value of resistance. |
| A. | 1.732 |
| B. | 1.608 |
| C. | 1.543 |
| D. | 1.648 |
| Answer» B. 1.608 | |
| 3. |
Calculate the value of the time period if the frequency of the signal is 70 sec. |
| A. | 0.014 sec |
| B. | 0.013 sec |
| C. | 0.017 sec |
| D. | 0.079 sec |
| Answer» B. 0.013 sec | |
| 4. |
In a DC series motor, the electromagnetic torque 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>.5</sup> |
| Answer» C. I<sub>a</sub><sup>3</sup> | |
| 5. |
Calculate the moment of inertia of the sphere having a mass of 12 kg and radius of 78 cm. |
| A. | 7.888 kgm<sup>2</sup> |
| B. | 7.300 kgm<sup>2</sup> |
| C. | 7.545 kgm<sup>2</sup> |
| D. | 7.552 kgm<sup>2</sup> |
| Answer» C. 7.545 kgm<sup>2</sup> | |
| 6. |
The unit of current is Tesla. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
The generated e.m.f from 70-pole armature having 100 conductors driven at 10 rev/sec having flux per pole as 20 mWb, with wave winding is ___________ |
| A. | 730 V |
| B. | 740 V |
| C. | 700 V |
| D. | 690 V |
| Answer» D. 690 V | |
| 8. |
A 4-pole lap wound generator with 720 armature conductors and a flux per pole of .003 Wb has an armature current of 50 A. The developed torque is _________ |
| A. | 17.25 N-m |
| B. | 17.19 N-m |
| C. | 16.54 N-m |
| D. | 16.89 N-m |
| Answer» C. 16.54 N-m | |