MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A 3-phase synchronous alternator is connected to the infinite bus is over excited, that corresponds to ______________ |
| A. | capacitor |
| B. | inductor |
| C. | variable inductor |
| D. | any of the mentioned |
| Answer» B. inductor | |
| 2. |
An alternator is to be used for generation purpose in an aircraft. The most suited operating frequency of the alternator should be ____________ |
| A. | of 400 Hz to remove extra bulk |
| B. | of 400 Hz to reduce losses |
| C. | of 50 Hz to remove extra bulk |
| D. | none of the mentioned |
| Answer» B. of 400 Hz to reduce losses | |
| 3. |
In a single phase induction regulator, the voltage boost is maximum when armature mmf and rotor mmf make an angle of ____________ |
| A. | zero degrees |
| B. | 45 degrees |
| C. | 90 degrees |
| D. | 180 degrees |
| Answer» B. 45 degrees | |
| 4. |
If it asked by the customer to provide tappings on the transformer, the most efficient and economical way to provide it at ____________ |
| A. | middle of hv winding |
| B. | phase end of hv winding |
| C. | neutral end of hv winding |
| D. | middle of lv winding |
| Answer» B. phase end of hv winding | |
| 5. |
The dc series generator is employed as ____________ |
| A. | a booster to maintain constant voltage at the end of the feeder |
| B. | for supplying traction load |
| C. | for battery bank charging |
| D. | none of the mentioned |
| Answer» B. for supplying traction load | |
| 6. |
The most widely used application of ac series motor is ____________ |
| A. | electric traction upto 1600 kW |
| B. | paper mills |
| C. | welding |
| D. | none of the mentioned |
| Answer» E. | |
| 7. |
Synchronous-induction coupled motors are required for ____________ |
| A. | high starting torque applications |
| B. | high pull out torque applications |
| C. | high running torques applications |
| D. | none of the mentioned |
| Answer» B. high pull out torque applications | |