MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
IN_A_FOUR_STROKE_CYCLE,_THE_MINIMUM_TEMPERATURE_INSIDE_THE_ENGINE_CYLINDER_OCCURS_AT_THE?$ |
| A. | end of suction stroke |
| B. | beginning of exhaust stroke |
| C. | beginning of suction stroke |
| D. | end of exhaust stroke |
| Answer» D. end of exhaust stroke | |
| 2. |
The effective inhibitor of pre-ignition is$ |
| A. | alcohol |
| B. | lead |
| C. | water |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 3. |
The brake power of a diesel engine, keeping other parameters constant, can be increased b? |
| A. | increasing the pressure of intake air |
| B. | decreasing the density of intake air |
| C. | decreasing the pressure of intake air |
| D. | increasing the temperature of intake air |
| Answer» B. decreasing the density of intake air | |
| 4. |
The exhaust valve in a four stroke cycle petrol engine |
| A. | opens at 50° after bottom dead centre and closes at 15° before top dead centre |
| B. | opens at 50° before bottom dead centre and closes at 15° after top dead centre |
| C. | opens at bottom dead centre and closes at top dead centre |
| D. | may open and close anywhere |
| Answer» C. opens at bottom dead centre and closes at top dead centre | |
| 5. |
In a four stroke cycle petrol engine, the charge is ignited at |
| A. | 30° after bottom dead centre |
| B. | 30° before bottom dead centre |
| C. | 30° after top dead centre |
| D. | 30° before top dead centre |
| Answer» E. | |
| 6. |
The thermal efficiency of diesel engines is about |
| A. | 30% |
| B. | 15% |
| C. | 50% |
| D. | 70% |
| Answer» E. | |
| 7. |
A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to |
| A. | slow down the speed of fast moving neutrons |
| B. | control the reaction |
| C. | reduce the temperature |
| D. | extract heat from nuclear reaction |
| Answer» B. control the reaction | |
| 8. |
The expansion of fuel in a four stroke cycle diesel engine |
| A. | starts at 15° after top dead centre and ends at 30° before bottom dead centre |
| B. | starts at top dead centre and ends at 30° after top dead centre |
| C. | may start and end anywhere |
| D. | starts at 15° before top dead centre and ends at 30° after top dead centre |
| Answer» B. starts at top dead centre and ends at 30¬¨¬®‚Äö√†√ª after top dead centre | |
| 9. |
Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is |
| A. | Carbon dioxide |
| B. | Heavy Water |
| C. | Graphite |
| D. | No moderator is needed |
| Answer» E. | |
| 10. |
Nuclear Reactors are used |
| A. | to produce heat for thermoelectric power |
| B. | to propel ships, submarines, aircrafts |
| C. | to produce fissionable material |
| D. | all of the mentioned |
| Answer» E. | |