Discussion
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- Question
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
- Correct Answer
- cetane and alpha-methyl naphthalene
- 1. 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
- 2. 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
- 3. 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
- 4. A fuel will detonate less if it has higher self ignition temperature.
Options- A. True
- B. False Discuss
- 5. The correct sequence of the decreasing order of brake thermal efficiency of the three given basic types of engines is
Options- A. four stroke C.I. engine, four stroke S.I. engine, two stroke S.I. engine
- B. four stroke S.I. engine, four stroke C.I. engine, two stroke S.I. engine
- C. four stroke C.I. engine, two stroke S.I. engine, four stroke S.I. engine
- D. two stroke S.I. engine, four stroke S.I. engine, four stroke C.I. engine Discuss
- 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
- 7. The indicated power for multi-cylinder engine will be same as that of a single cylinder engine.
Options- A. True
- B. False Discuss
- 8. If the speed of the engine is increased, the indicated power will
Options- A. increase
- B. decrease
- C. remain same Discuss
- 9. The petrol engines are also known as __________ engines.
Options- A. compression ignition
- B. spark ignition Discuss
- 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
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: all of the above
Correct Answer: Correct
Correct Answer: short delay period
Correct Answer: True
Correct Answer: four stroke C.I. engine, four stroke S.I. engine, two stroke S.I. engine
Correct Answer: one-half
Correct Answer: False
Correct Answer: increase
Correct Answer: spark ignition
Correct Answer: 40% cetane and 60% alpha methyl napthalene
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