IC Engines and Nuclear Power Plants problems
- 1. A fuel will detonate less if it has higher self ignition temperature.
Options- A. True
- B. False Discuss
Correct Answer: True
- 2. In order to eliminate knocking in compression ignition engines, there should be
Options- A. short delay period
- B. late auto-ignition
- C. low compression ratio
- D. high self ignition temperature of fuel Discuss
Correct Answer: short delay period
- 3. The size of a reactor at which the chain reaction can be initiated (i.e. when system becomes critical) with just enough fissionable material (called critical mass of fuel) is known as critical size of reactor.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 4. Which of the following statement is correct?
Options- A. Compression ratio for petrol engines varies from 6 to 10.
- B. Higher compression ratio in diesel engines results in higher pressures.
- C. Petrol engines work on Otto cycle.
- D. all of the above Discuss
Correct Answer: all of the above
- 5. The two reference fuels used for cetane rating are
Options- A. cetane and iso-octane
- B. cetane and alpha-methyl naphthalene
- C. cetane and normal heptane
- D. cetane and tetra ethyl lead Discuss
Correct Answer: cetane and alpha-methyl naphthalene
- 6. Number of working strokes per min. for a four stroke cycle engine are __________ the speed of the engine in r.p.m.
Options- A. equal to
- B. one-half
- C. twice
- D. four-times Discuss
Correct Answer: one-half
- 7. The indicated power for multi-cylinder engine will be same as that of a single cylinder engine.
Options- A. True
- B. False Discuss
Correct Answer: False
- 8. If the speed of the engine is increased, the indicated power will
Options- A. increase
- B. decrease
- C. remain same Discuss
Correct Answer: increase
- 9. The petrol engines are also known as __________ engines.
Options- A. compression ignition
- B. spark ignition Discuss
Correct Answer: spark ignition
- 10. A fuel of cetane number 40 has the same ignition quality as a mixture of
Options- A. 40% cetane and 60% alpha methyl napthalene
- B. 40% alpha methyl napthalene and 60% cetane
- C. 40% petrol and 60% diesel
- D. 40% diesel and 60% petrol Discuss
Correct Answer: 40% cetane and 60% alpha methyl napthalene
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