MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Transformers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
MINIMUM_VOLTAGE_REGULATION_OCCURS_WHEN_THE_POWER_FACTOR_OF_THE_LOAD_IS_______________?$ |
| A. | Unity |
| B. | Lagging |
| C. | Leading |
| D. | Zero |
| Answer» D. Zero | |
| 2. |
Which of the following acts as a protection against high voltage surges due to lightning and switching? |
| A. | Horn gaps |
| B. | Thermal overload relays |
| C. | Breather |
| D. | Conservator |
| Answer» B. Thermal overload relays | |
| 3. |
A good voltage regulation of a transformer indicates ______________ |
| A. | output voltage fluctuation from no load to full load is least |
| B. | output voltage fluctuation with power factor is least |
| C. | difference between primary and secondary voltage is least |
| D. | difference between primary and secondary voltage is maximum |
| Answer» B. output voltage fluctuation with power factor is least | |
| 4. |
When will a transformer have regulation closer to zero? |
| A. | On full-load |
| B. | On overload |
| C. | On leading power factor |
| D. | On zero power factor |
| Answer» D. On zero power factor | |
| 5. |
Negative voltage regulation indicates ___________ |
| A. | Capacitive loading only |
| B. | Inductive loading only |
| C. | Inductive or resistive loading |
| D. | Cannot be determined |
| Answer» B. Inductive loading only | |
| 6. |
In an actual transformer the iron loss remains practically constant from no load to full load because ___________ |
| A. | Value of transformation ratio remains constant |
| B. | Permeability of transformer core remains constant |
| C. | Core flux remains practically constant |
| D. | Primary voltage remains constant |
| Answer» D. Primary voltage remains constant | |
| 7. |
What will happen to a given transformer if it made to run at its rated voltage but reduced frequency? |
| A. | Flux density remains unaffected |
| B. | Iron losses are reduced |
| C. | Core flux density is reduced |
| D. | Core flux density is increased |
| Answer» E. | |
| 8. |
A transformer can have zero voltage regulation at _______ |
| A. | Leading power factor |
| B. | Lagging power factor |
| C. | Unity power factor |
| D. | Zero power factor |
| Answer» B. Lagging power factor | |
| 9. |
The highest voltage for transmitting electrical power in India is _______ |
| A. | 33 kV |
| B. | 66 kV |
| C. | 132 kV |
| D. | 00 kV |
| Answer» E. | |