Discussion
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- Question
Which of the following statement is wrong?
Options- A. In compression ignition engines, detonation occurs near the beginning of combustion.
- B. Since the fuel, in compression ignition engines, is injected at the end of compression stroke, therefore, there will be no pre-ignition.
- C. To eliminate knock in compression ignition engines, we want to achieve auto-ignition not early and desire a long delay period.
- D. In compression ignition engines, because of hetrogeneous mixture, the rate of pressure rise is comparatively lower.
- Correct Answer
- To eliminate knock in compression ignition engines, we want to achieve auto-ignition not early and desire a long delay period.
- 1. Supercharging __________ the power developed by the engine.
Options- A. has no effect on
- B. increases
- C. decreases Discuss
- 2. In compression ignition engines, swirl denotes a
Options- A. haphazard motion of the gases in the chamber
- B. rotary motion of the gases in the chamber
- C. radial motion of the gases in the chamber
- D. none of the above Discuss
- 3. The control rods in the control system of nuclear reactors are used to
Options- A. absorb excess neutrons
- B. control fuel consumption
- C. control temperature
- D. all of these Discuss
- 4. The cetane (C16H34) which is a straight chain paraffin is assigned a cetane number of
Options- A. 0
- B. 50
- C. 100
- D. 120 Discuss
- 5. Which of the following statement is correct regarding petrol engines?
Options- A. A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure.
- B. The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug.
- C. The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition.
- D. all of the above Discuss
- 6. The running cost of a petrol engine is __________ than that of a diesel engine.
Options- A. higher
- B. lower Discuss
- 7. The mechanical efficiency (?m) of the engine is given by
Options- A.
- B.
- C.
- D. none of these Discuss
- 8. A higher compression ratio causes
Options- A. pre-ignition
- B. increase in detonation
- C. an acceleration in the rate of combustion
- D. any one of these Discuss
- 9. The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to
Options- A. inject fuel in a chamber of high pressure at the end of compression stroke
- B. inject fuel at a high velocity to facilitate atomisation
- C. ensure that penetration is not high
- D. all of the above Discuss
- 10. In a two stroke engine, the working cycle is completed in two revolutions of the crankshaft.
Options- A. Correct
- B. Incorrect Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: increases
Correct Answer: rotary motion of the gases in the chamber
Correct Answer: absorb excess neutrons
Correct Answer: 100
Correct Answer: The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug.
Correct Answer: higher
Correct Answer:
Correct Answer: any one of these
Correct Answer: all of the above
Correct Answer: Incorrect
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