Discussion
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- Question
Diesel as compared to petrol is
Options- A. highly ignitable
- B. more difficult to ignite
- C. less difficult to ignite
- D. none of these
- Correct Answer
- more difficult to ignite
- 1. The fuel valve in a four stroke cycle diesel engine
Options- A. opens at 15° after top dead centre and closes at 20° before bottom dead centre
- B. opens at 15° before top dead centre and closes at 20° after top dead centre
- C. opens at top dead centre and closes at bottom dead centre
- D. may open and close anywhere Discuss
- 2. The __________ engines can work on very lean mixture of fuel.
Options- A. spark ignition
- B. compression ignition Discuss
- 3. As compared to air standard cycle, in actual working, the effect of variation in specific heats is to
Options- A. increase maximum pressure and maximum temperature
- B. reduce maximum pressure and maximum temperature
- C. increase maximum pressure and decrease maximum temperature
- D. decrease maximum pressure and increase maximum temperature Discuss
- 4. In a four stroke engine, the working cycle is completed in
Options- A. one revolution of the crankshaft
- B. two revolutions of the crankshaft
- C. three revolutions of the crankshaft
- D. four revolutions of the crankshaft Discuss
- 5. An ignition coil in the spark ignition engines supplies __________ voltage to the spark plug.
Options- A. high
- B. low Discuss
- 6. Enriched uranium may contain fissionable contents from
Options- A. 1 to 40%
- B. 10 to 50%
- C. 1 to 80%
- D. 1 to 99% Discuss
- 7. In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.
Options- A. Agree
- B. Disagree Discuss
- 8. The ignition quality of diesel oil is expressed by
Options- A. cetane number
- B. octane number
- C. calorific value
- D. none of these Discuss
- 9. If petrol is used in a diesel engine, then
Options- A. low power will be produced
- B. efficiency will be low
- C. higher knocking will occur
- D. black smoke will be produced Discuss
- 10. In a four stroke cycle petrol engine, the expansion
Options- A. starts at top dead centre and ends at bottom dead centre
- B. starts at 30° before top dead centre and ends at 50° before bottom dead centre
- C. starts at 30° after top dead centre and ends at 50° after bottom dead centre
- D. may start and end anywhere Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: opens at 15° before top dead centre and closes at 20° after top dead centre
Correct Answer: compression ignition
Correct Answer: reduce maximum pressure and maximum temperature
Correct Answer: two revolutions of the crankshaft
Correct Answer: high
Correct Answer: 1 to 99%
Correct Answer: Disagree
Correct Answer: cetane number
Correct Answer: higher knocking will occur
Correct Answer: starts at 30° before top dead centre and ends at 50° before bottom dead centre
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