MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
For large DC machines, the yoke is usually made of which material? |
| A. | Cast steel |
| B. | Cast iron |
| C. | Iron |
| D. | Cast steel or cast iron |
| Answer» B. Cast iron | |
| 2. |
The slope of the V-I curve is 26°. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line. |
| A. | .487 Ω |
| B. | .482 Ω |
| C. | .483 Ω |
| D. | .448 Ω |
| Answer» B. .482 Ω | |
| 3. |
Calculate the value of the frequency if the signal completes half of the cycle in 70 sec. Assume signal is periodic. |
| A. | 0.00714 Hz |
| B. | 0.00456 Hz |
| C. | 0.00845 Hz |
| D. | 0.00145 Hz |
| Answer» B. 0.00456 Hz | |
| 4. |
What is the unit of the intensity? |
| A. | Watt/m2 |
| B. | Watt/m |
| C. | Watt/m4 |
| D. | Watt/m3 |
| Answer» B. Watt/m | |
| 5. |
The field control method is suitable for constant torque drives. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
Calculate the mass of the ball having a moment of inertia 4.5 kgm2 and radius of 14 cm. |
| A. | 229.59 kg |
| B. | 228.56 kg |
| C. | 228.54 kg |
| D. | 227.52 kg |
| Answer» B. 228.56 kg | |
| 7. |
The unit of active power is Watt. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
The generated e.m.f from 20-pole armature having 800 conductors driven at 30 rev/sec having flux per pole as 60 mWb, with 16 parallel paths is ___________ |
| A. | 1900 V |
| B. | 1840 V |
| C. | 1700 V |
| D. | 1800 V |
| Answer» E. | |
| 9. |
Swinburne’s test can be conducted on ___________ |
| A. | Series motor |
| B. | Shunt motor |
| C. | Compound motor |
| D. | Shunt and compound motor |
| Answer» E. | |