Discussion
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- Question
The ignition quality of diesel oil is expressed by
Options- A. cetane number
- B. octane number
- C. calorific value
- D. none of these
- Correct Answer
- cetane number
- 1. 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
- 2. 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
- 3. Diesel as compared to petrol is
Options- A. highly ignitable
- B. more difficult to ignite
- C. less difficult to ignite
- D. none of these Discuss
- 4. 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
- 5. The __________ engines can work on very lean mixture of fuel.
Options- A. spark ignition
- B. compression ignition Discuss
- 6. 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
- 7. 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
- 8. During idling, a petrol engine requires __________ mixture.
Options- A. lean
- B. rich
- C. chemically correct Discuss
- 9. The brake power is always greater than indicated power.
Options- A. Agree
- B. Disagree Discuss
- 10. The sensing element in the control system of nuclear reactors measure the __________ of the neutron flux in the reactor.
Options- A. temperature
- B. volume
- C. density
- D. none of these Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: Disagree
Correct Answer: 1 to 99%
Correct Answer: more difficult to ignite
Correct Answer: opens at 15° before top dead centre and closes at 20° after top dead centre
Correct Answer: compression ignition
Correct Answer: higher knocking will occur
Correct Answer: starts at 30° before top dead centre and ends at 50° before bottom dead centre
Correct Answer: rich
Correct Answer: Disagree
Correct Answer: density
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