IC Engines and Nuclear Power Plants problems
- 1. In petrol engines, advancing of the spark timing will __________ the knocking tendency.
Options- A. not effect
- B. decrease
- C. increase Discuss
Correct Answer: increase
- 2. The delay period in oil engines increases with increase in the speed of engine.
Options- A. Agree
- B. Disagree Discuss
Correct Answer: Disagree
- 3. If the temperature of intake air in internal combustion engine increases, then its efficiency will
Options- A. remain same
- B. decrease
- C. increase Discuss
Correct Answer: decrease
- 4. In a four stroke cycle petrol engine, , the compression
Options- A. starts at 40° after bottom dead centre and ends at 30° before top dead centre
- B. starts at 40° before bottom dead centre and ends at 30° after bottom dead centre
- C. starts at bottom dead centre and ends at top dead centre
- D. may start and end anywhere Discuss
Correct Answer: starts at 40° after bottom dead centre and ends at 30° before top dead centre
- 5. The operation of forcing additional air under pressure into the engine cylinder is known as
Options- A. supercharging
- B. carburation
- C. turbulence
- D. delay period Discuss
Correct Answer: supercharging
- 6. Supercharging is the process of supplying the intake air to the engine cylinder at a density __________ the density of the surrounding atmosphere.
Options- A. equal to
- B. less than
- C. greater than Discuss
Correct Answer: greater than
- 7. In a four stroke cycle engine, the sequence of operations is
Options- A. suction, compression, expansion and exhaust
- B. suction, expansion, compression and exhaust
- C. expansion, compression, suction and exhaust
- D. compression, expansion, suction and exhaust Discuss
Correct Answer: suction, compression, expansion and exhaust
- 8. The ignition quality of petrol is expressed by
Options- A. cetane number
- B. octane number
- C. calorific value
- D. all of these Discuss
Correct Answer: octane number
- 9. Anti-knock for compression ignition engines is
Options- A. napthene
- B. tetra ethyl lead
- C. amyl nitrate
- D. hexadecane Discuss
Correct Answer: amyl nitrate
- 10. A two stroke cycle engine gives __________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
Options- A. half
- B. same
- C. double
- D. four times Discuss
Correct Answer: double
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