MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Power Plant knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When two vapour cycles are coupled in series and heat rejected by one is absorbed by another, the cycle is called as? |
| A. | Dual vapour cycle |
| B. | Binary vapour cycle |
| C. | Coupled vapour cycle |
| D. | None of the mentioned |
| Answer» C. Coupled vapour cycle | |
| 2. |
WHAT_IS_THE_IMPORTANCE_OF_THE_FREEZING_POINT_OF_THE_WORKING_FLUID_IN_THE_VAPOUR_POWER_CYCLE??$ |
| A. | freezing point of working fluid should be below the room temperature |
| B. | freezing point of working fluid should be above the room temperature |
| C. | freezing point of working fluid should be equal to the room temperature |
| D. | does not have any importance |
| Answer» B. freezing point of working fluid should be above the room temperature | |
| 3. |
The engines which are operating on gas power cycle are?$ |
| A. | cyclic |
| B. | non-cyclic |
| C. | either cyclic or non-cyclic |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 4. |
When_two_vapour_cycles_are_coupled_in_series_and_heat_rejected_by_one_is_absorbed_by_another,_the_cycle_is_called_as?$ |
| A. | Dual vapour cycle |
| B. | Binary vapour cycle |
| C. | Coupled vapour cycle |
| D. | None of the mentioned |
| Answer» C. Coupled vapour cycle | |
| 5. |
The specific heat of the ideal working fluid used in vapour power cycl? |
| A. | should be constant |
| B. | should be large |
| C. | should be small |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 6. |
For maximum efficiency of vapour power cycle, what should be the critical temperature of working fluid? |
| A. | the working fluid should have critical temperature as low as possible |
| B. | the working fluid should have critical temperature as high as possible |
| C. | the critical temperature does not affect the efficiency of the vapour power cycle |
| D. | none of the mentioned |
| Answer» C. the critical temperature does not affect the efficiency of the vapour power cycle | |
| 7. |
Which is the drawback of the steam as a working substance in a power cycle? |
| A. | in a vapour power cycle, maximum temperature which can be obtained with best available material is more than the critical temperature of water and requires large superheating |
| B. | it allows only small amount of heat addition at the highest temperature |
| C. | it requires reheat and reheater tubes are costly |
| D. | all of the mentioned |
| Answer» E. | |
| 8. |
The use of which of the following becomes necessary during expansion of steam? |
| A. | reheat |
| B. | regeneration |
| C. | refrigeration |
| D. | superheat |
| Answer» B. regeneration | |
| 9. |
Temperature of heat rejection in a condenser can be lowered by using? |
| A. | lubricant |
| B. | oil |
| C. | refrigerant |
| D. | diesel |
| Answer» D. diesel | |
| 10. |
What is the relation of mean temperature of heat addition and cycle efficiency? |
| A. | both are inversely proportional |
| B. | both are directly proportional |
| C. | both are independent of each other |
| D. | none of the mentioned |
| Answer» C. both are independent of each other | |
| 11. |
High moisture content is involved during expansion of steam because? |
| A. | to ensure uniform heating |
| B. | to ensure uniform cooling |
| C. | to obtain a higher temperature of heat addition |
| D. | to obtain a lower temperature of heat addition |
| Answer» D. to obtain a lower temperature of heat addition | |
| 12. |
Addition of an infinitesimal amount of heat at the highest temperature is because? |
| A. | to initiate reheating |
| B. | to initiate regeneration |
| C. | to initiate superheating |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |