MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Transformers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Natural air cooling method can’t be adopted because of some unavoidable effects, beyond _______ |
| A. | 1.5 MVA |
| B. | 5 MVA |
| C. | 15 MVA |
| D. | 50 MVA |
| Answer» B. 5 MVA | |
| 2. |
What should be ideal volatility and ideal viscosity of the transformer oil? |
| A. | Low, low |
| B. | High, high |
| C. | Low, high |
| D. | High, low |
| Answer» B. High, high | |
| 3. |
Which of the following listed component will see and perform according to changes in volume of transformer cooling oil due to variation of atmospheric temperature during day and night? |
| A. | Conservator |
| B. | Breather |
| C. | Bushings |
| D. | Buchholz relay |
| Answer» B. Breather | |
| 4. |
Buchholz’s relay will give 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. | Cannot be determined |
| Answer» B. Electrical fault outside the transformer in outgoing feeder | |
| 5. |
Gas is liberated due to temperature limit and due to dissociation of transformer oil after ___________ |
| A. | 50°C |
| B. | 80°C |
| C. | 100°C |
| D. | 150°C |
| Answer» E. | |
| 6. |
On which of the following transformer, Buchholz’s relay can be fixed on? |
| A. | Auto-transformers |
| B. | Air-cooled transformers |
| C. | Welding transformers |
| D. | Oil cooled transformers |
| Answer» E. | |
| 7. |
BUCHHOLZ‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_RELAY_WILL_GIVE_WARNING_AND_PROTECTION_AGAINST____________?$# |
| A. | Electrical fault inside the transformer itself |
| B. | Electrical fault outside the transformer in outgoing feeder |
| C. | For both outside and inside faults |
| D. | Cannot be determined |
| Answer» B. Electrical fault outside the transformer in outgoing feeder | |
| 8. |
GAS_IS_LIBERATED_DUE_TO_TEMPERATURE_LIMIT_AND_DUE_TO_DISSOCIATION_OF_TRANSFORMER_OIL_AFTER____________?$ |
| A. | 50°C |
| B. | 80°C |
| C. | 100°C |
| D. | 150°C |
| Answer» E. | |
| 9. |
What should be ideal volatility and ideal viscosity of the transformer oil?$ |
| A. | Low, low |
| B. | High, high |
| C. | Low, high |
| D. | High, low |
| Answer» B. High, high | |
| 10. |
Which of the following listed component will see and perform according to changes in volume of transformer cooling oil due to variation of atmospheric temperature during day and night?$ |
| A. | Conservator |
| B. | Breather |
| C. | Bushings |
| D. | Buchholz relay |
| Answer» B. Breather | |
| 11. |
Natural air cooling method can’t be adopted because of some unavoidable effects, beyond _______$ |
| A. | 1.5 MVA |
| B. | 5 MVA |
| C. | 15 MVA |
| D. | 50 MVA |
| Answer» B. 5 MVA | |
| 12. |
What is the function of breather in a transformer? |
| A. | To provide oxygen inside the tank |
| B. | To cool the coils during reduced load |
| C. | To cool the transformer oil |
| D. | To arrest flow of moisture when outside air enters the transformer |
| Answer» E. | |
| 13. |
On which of the following transformer, Buchholz’s relay can be fixed on?# |
| A. | Auto-transformers |
| B. | Air-cooled transformers |
| C. | Welding transformers |
| D. | Oil cooled transformers |
| Answer» E. | |
| 14. |
A transformer oil used in an electrical transformer must be free from ________ |
| A. | Gases |
| B. | Odour |
| C. | Sludge |
| D. | Moisture |
| Answer» E. | |
| 15. |
Which chemical is used in breather? |
| A. | Asbestos fibre |
| B. | Silica sand |
| C. | Sodium chloride |
| D. | Silica gel |
| Answer» E. | |
| 16. |
Which of the following is the most important quality required for chemical in breather, so that it can be used perfectly in an electrical transformer? |
| A. | Ionizing air |
| B. | Absorbing moisture |
| C. | Cleansing the transformer oil |
| D. | Cooling the transformer oil |
| Answer» C. Cleansing the transformer oil | |
| 17. |
What is the function of spacers? |
| A. | To insulate the coils from each other |
| B. | To provide free passage to the cooling oil |
| C. | To insulate coils and provide free passage |
| D. | Cannot be determined |
| Answer» C. To insulate coils and provide free passage | |
| 18. |
Natural oil cooling method have some limitations due to which it is adopted for transformers up to a rating of ____________ |
| A. | 3000 kVA |
| B. | 1000 kVA |
| C. | 500 kVA |
| D. | 250 kVA |
| Answer» B. 1000 kVA | |
| 19. |
Function of conservator in an electrical transformer is __________ |
| A. | Supply cooling oil to transformer in time of need |
| B. | Provide fresh air for cooling the transformer |
| C. | Protect the transformer from damage when oil expends due to heating |
| D. | Cannot be determkned |
| Answer» D. Cannot be determkned | |
| 20. |
Which is the most common, famous and adopted method of cooling of a power transformer? |
| A. | Air blast cooling |
| B. | Natural air cooling |
| C. | Oil cooling |
| D. | Any of the above method can be used |
| Answer» D. Any of the above method can be used | |