MCQOPTIONS
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MCQOPTIONS
This section includes 13 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. |
Which one of the following methods would give a lower than the actual value of regulation of the alternator? |
| A. | ZPF method |
| B. | MMF method |
| C. | EMF method |
| D. | ASA method |
| Answer» C. EMF method | |
| 2. |
Calculate the active power in an 8965 resistor with .23 A current flowing through it. |
| A. | 547.12 W |
| B. | 474.24 W |
| C. | 554.78 W |
| D. | 123.88 W |
| Answer» C. 554.78 W | |
| 3. |
Calculate the active power in a 32 H inductor. |
| A. | 28 W |
| B. | 189 W |
| C. | 4 W |
| D. | 0 W |
| Answer» E. | |
| 4. |
Calculate the active power in a 543 F capacitor. |
| A. | 581 W |
| B. | 897 W |
| C. | 0 W |
| D. | 892 W |
| Answer» D. 892 W | |
| 5. |
Calculate the active power in an 8764 H inductor. |
| A. | 8645 W |
| B. | 6485 W |
| C. | 0 W |
| D. | 4879 W |
| Answer» D. 4879 W | |
| 6. |
The slope of the V-I curve is 6.9 . Calculate the value of resistance. Assume the relationship between voltage and current is a straight line. |
| A. | .38 |
| B. | .59 |
| C. | .34 |
| D. | .12 |
| Answer» E. | |
| 7. |
Calculate the value of the frequency if the capacitive reactance is .1 and the value of the capacitor is .02 F. |
| A. | 71.25 Hz |
| B. | 81.75 Hz |
| C. | 79.61 Hz |
| D. | 79.54 Hz |
| Answer» D. 79.54 Hz | |
| 8. |
Calculate the useful power developed by a motor using the given data: Eb = 4V and I = 52 A. Assume frictional losses are 3 W and windage losses are 2 W. |
| A. | 203 W |
| B. | 247 W |
| C. | 211 W |
| D. | 202 W |
| Answer» B. 247 W | |
| 9. |
Calculate the moment of inertia of the stick about its center having a mass of 1.1 kg and length of 2.9 m. |
| A. | .66 kgm<sup>2</sup> |
| B. | .77 kgm<sup>2</sup> |
| C. | .88 kgm<sup>2</sup> |
| D. | .47 kgm<sup>2</sup> |
| Answer» C. .88 kgm<sup>2</sup> | |
| 10. |
Calculate the moment of inertia of the stick about its end having a mass of 22 kg and length of 22 cm. |
| A. | .088 kgm<sup>2</sup> |
| B. | .087 kgm<sup>2</sup> |
| C. | .089 kgm<sup>2</sup> |
| D. | .086 kgm<sup>2</sup> |
| Answer» C. .089 kgm<sup>2</sup> | |
| 11. |
Calculate the phase angle of the sinusoidal waveform u(t)=154sin(9.85 t- 89). |
| A. | -78 9 |
| B. | -12 5 |
| C. | - 89 |
| D. | -2 888 |
| Answer» D. -2 888 | |
| 12. |
The generated e.m.f from 22-pole armature having 75 turns driven at 78 rpm having flux per pole as 400 mWb, with lap winding is ___________ |
| A. | 76 V |
| B. | 77 V |
| C. | 78 V |
| D. | 79 V |
| Answer» D. 79 V | |
| 13. |
Calculate the angular frequency of the waveform y(t)=69sin(40 t+4 ). |
| A. | 40 Hz |
| B. | 60 Hz |
| C. | 70 Hz |
| D. | 20 Hz |
| Answer» B. 60 Hz | |