Discussion
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- Question
Spark plugs in automobiles generally have a gap between
Options- A. 0.3 to 0.7 mm
- B. 0.2 to 0.8 mm
- C. 0.4 to 0.9 mm
- D. 0.6 to 1.8 mm
- Correct Answer
- 0.6 to 1.8 mm
ExplanationSpark plugs in automobiles generally have a gap between 0.6 and 1.8 mm (0.024 and 0.071 in). The gap may require adjustment from the out-of-the-box gap. - 1. In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have
Options- A. low density
- B. low temperature
- C. long ignition delay
- D. all of these Discuss
- 2. In a petrol engine, the charge is ignited with the help of a spark plug.
Options- A. Yes
- B. No Discuss
- 3. The combustion in compression ignition engines is
Options- A. homogeneous
- B. hetrogeneous
- C. both (a) and (b)
- D. none of these Discuss
- 4. The pressure at the end of compression, in petrol engines, is approximately
Options- A. 10 bar
- B. 20 bar
- C. 25 bar
- D. 35 bar Discuss
- 5. The specific fuel consumption per B.P. hour for a petrol engine is about
Options- A. 0.2 kg
- B. 0.25 kg
- C. 0.3 kg
- D. 0.35 kg Discuss
- 6. A reactor capable of converting a fertile material into fissile isotopes is called regenerative reactor.
Options- A. Yes
- B. No Discuss
- 7. Which of the following statement is wrong?
Options- A. A four stroke cycle engine develops twice the power as that of a two stroke cycle engine.
- B. For the same power developed, a four stroke cycle engine is lighter, less bulky and occupies less floor area.
- C. The petrol engines are costly than diesel engines.
- D. all of the above Discuss
- 8. The reflectivity of a reflector is defined as the fraction of neutrons entering the reflector which are returned to the core.
Options- A. Agree
- B. Disagree Discuss
- 9. Which of the following fuel detonates readily?
Options- A. Benzene
- B. Iso-octane
- C. Normal heptane
- D. Alcohol Discuss
- 10. The knocking tendency in spark ignition engines may be decreased by
Options- A. controlling the air-fuel mixture
- B. controlling the ignition timing
- C. controlling the exhaust temperature
- D. reducing the compression ratio Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: all of these
Correct Answer: Yes
Correct Answer: hetrogeneous
Correct Answer: 10 bar
Correct Answer: 0.25 kg
Correct Answer: Yes
Correct Answer: all of the above
Correct Answer: Agree
Correct Answer: Normal heptane
Correct Answer: reducing the compression ratio
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