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- Question
The ignition quality of petrol is expressed by
Options- A. cetane number
- B. octane number
- C. calorific value
- D. all of these
- Correct Answer
- octane number
- 1. 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
- 2. 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
- 3. 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
- 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
- 5. If the temperature of intake air in internal combustion engine increases, then its efficiency will
Options- A. remain same
- B. decrease
- C. increase Discuss
- 6. Anti-knock for compression ignition engines is
Options- A. napthene
- B. tetra ethyl lead
- C. amyl nitrate
- D. hexadecane Discuss
- 7. 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
- 8. In a coil ignition system of petrol engines, a condenser is connected across the contact-breaker in order to
Options- A. prevent sparking across the gap between the points
- B. cause more rapid break of the primary current, giving a higher voltage in the secondary circuit
- C. both (a) and (b)
- D. none of the above Discuss
- 9. An ignition coil in the spark ignition engines supplies __________ voltage to the spark plug.
Options- A. high
- B. low Discuss
- 10. In a four stroke engine, the working cycle is completed in
Options- A. one revolution of the crankshaft
- B. two revolutions of the crankshaft
- C. three revolutions of the crankshaft
- D. four revolutions of the crankshaft Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: suction, compression, expansion and exhaust
Correct Answer: greater than
Correct Answer: supercharging
Correct Answer: starts at 40° after bottom dead centre and ends at 30° before top dead centre
Correct Answer: decrease
Correct Answer: amyl nitrate
Correct Answer: double
Correct Answer: both (a) and (b)
Correct Answer: high
Correct Answer: two revolutions of the crankshaft
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