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. |
The reactive power flow is outward from an alternator, then the alternator works at ____________ |
| A. | lagging power factor |
| B. | leading power factor |
| C. | zero power factor |
| D. | normal power factor |
| Answer» B. leading power factor | |
| 2. |
The reactive power flow is outward from an alternator, then it is ____________ |
| A. | over excited |
| B. | under excited |
| C. | critically excited |
| D. | none of the mentioned |
| Answer» B. under excited | |
| 3. |
Reactive power is a matter of interest at ____________ |
| A. | output terminals of generator |
| B. | input terminal of motor |
| C. | output terminals of generator and input terminal of motor |
| D. | none of the mentioned |
| Answer» B. input terminal of motor | |
| 4. |
For a 3 phase synchronous generator of terminal voltage as 1 pu and field excitation of 1.5 pu. If the resistive drop is 0.2 pv, then what can be concluded for power factor? |
| A. | Leading |
| B. | Lagging |
| C. | Upf |
| D. | Zpf |
| Answer» C. Upf | |
| 5. |
For a 3 phase synchronous generator of terminal voltage as 1 pu and field excitation of 1 pu. If the resistive drop is 0.2 pv, then what can be concluded for power factor? |
| A. | Leading |
| B. | Lagging |
| C. | Upf |
| D. | Zpf |
| Answer» B. Lagging | |
| 6. |
For an alternator, the specified load angle should be _________ for an impedance angle of . |
| A. | = |
| B. | =90- |
| C. | =90+ |
| D. | =- |
| Answer» B. =90- | |
| 7. |
The condition for maximum power output for an alternator having its load impedance as (2+j) ohms is? |
| A. | 26.56 |
| B. | 63.43 |
| C. | 90 |
| D. | 116.56 |
| Answer» B. 63.43 | |