Discussion
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- Question
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
- Correct Answer
- all of these
- 1. In a petrol engine, the charge is ignited with the help of a spark plug.
Options- A. Yes
- B. No Discuss
- 2. The combustion in compression ignition engines is
Options- A. homogeneous
- B. hetrogeneous
- C. both (a) and (b)
- D. none of these Discuss
- 3. 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
- 4. 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
- 5. A gas engine has a swept volume of 300 cm3 and clearance volume of 25 cm3. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is
Options- A. 248 cm3
- B. 252 cm3
- C. 264 cm3
- D. 286 cm3 Discuss
- 6. 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 Discuss
- 7. A reactor capable of converting a fertile material into fissile isotopes is called regenerative reactor.
Options- A. Yes
- B. No Discuss
- 8. 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
- 9. 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
- 10. Which of the following fuel detonates readily?
Options- A. Benzene
- B. Iso-octane
- C. Normal heptane
- D. Alcohol Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: Yes
Correct Answer: hetrogeneous
Correct Answer: 10 bar
Correct Answer: 0.25 kg
Correct Answer: 264 cm3
Correct Answer: 0.6 to 1.8 mm
Explanation:
Spark 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.
Correct Answer: Yes
Correct Answer: all of the above
Correct Answer: Agree
Correct Answer: Normal heptane
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