MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Short circuit test on transformers is conducted to determine____________? |
| A. | Hysteresis losses |
| B. | Copper losses |
| C. | Core losses |
| D. | Eddy current losses |
| Answer» C. Core losses | |
| 2. |
Sumpner s test is conducted on transformers to determine_____________? |
| A. | Temperature |
| B. | Stray losses |
| C. | All-day efficiency |
| D. | None of the above |
| Answer» B. Stray losses | |
| 3. |
Spacers are provided between adjacent coils? |
| A. | To provide free passage to the cooling oil |
| B. | To insulate the coils from each other |
| C. | Both A. and (b) |
| D. | None of the above |
| Answer» B. To insulate the coils from each other | |
| 4. |
The transformer lamination s are insulated from each other by____________? |
| A. | Mica strip |
| B. | Thin coat of varnish |
| C. | Paper |
| D. | Any of the above |
| Answer» C. Paper | |
| 5. |
Buchholz s relay gives warning and protection against_________________? |
| A. | Electrical fault inside the transformer itself |
| B. | Electrical fault outside the transformer in outgoing feeder |
| C. | For both outside and inside faults |
| D. | None of the above |
| Answer» B. Electrical fault outside the transformer in outgoing feeder | |
| 6. |
The full-load copper loss of a trans former is 1600 W. At half-load, the copper loss will be___________? |
| A. | 6400 W |
| B. | 1600 W |
| C. | 800 W |
| D. | 400 W |
| Answer» E. | |
| 7. |
Silicon steel used in lamination s mainly reduces___________? |
| A. | Hysteresis loss |
| B. | Eddy current losses |
| C. | Copper losses |
| D. | All of the above |
| Answer» B. Eddy current losses | |
| 8. |
Star/star transformers work satisfactorily when________________? |
| A. | Load is unbalanced only |
| B. | Load is balanced only |
| C. | On balanced as well as unbalanced loads |
| D. | None of the above |
| Answer» C. On balanced as well as unbalanced loads | |
| 9. |
If the supply frequency to the transformer is increased, the iron loss will__________? |
| A. | Not change |
| B. | Decrease |
| C. | Increase |
| D. | Any of the above |
| Answer» D. Any of the above | |