Discussion
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- Question
The increase of efficiency of a compression ignition engine, as the load decreases, is due to
Options- A. higher maximum temperature
- B. qualitative governing
- C. quantitative governing
- D. hit and miss governing
- Correct Answer
- qualitative governing
- 1. A mixture containing 65% of iso-octane and 35% of normal heptane will have
Options- A. cetane number 65
- B. octane number 65
- C. qetane number 35
- D. octane number 35 Discuss
- 2. The delay period in compression ignition engines depends upon
Options- A. temperature and pressure in the cylinder at the time of injection
- B. nature of the fuel mixture strength
- C. relative velocity between the fuel injection and air turbulence pressure of residual gases
- D. all of the above Discuss
- 3. If V1 is the jet velocity and V0 is the vehicle velocity, then propulsive efficiency of a turbo-jet engine is
Options- A.
- B.
- C.
- D.
Discuss
- 4. Lubrication in I.C. engines dissipates the heat generated from the moving parts due to friction.
Options- A. True
- B. False Discuss
- 5. The working pressure and temperature inside the cylinder of an internal combustion engine is __________ as compared to a steam engine.
Options- A. low
- B. very low
- C. high
- D. very high Discuss
- 6. The knocking tendency in spark ignition engines can be decreased by adding dopes like tetra ethyle lead and ethylene dibromide.
Options- A. Agree
- B. Disagree Discuss
- 7. The function of a distributor in a coil ignition system of I.C. engines is
Options- A. to distribute spark
- B. to distribute power
- C. to distribute current
- D. to time the spark Discuss
- 8. 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
- 9. 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
- 10. 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
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: octane number 65
Correct Answer: all of the above
Correct Answer:
Correct Answer: True
Correct Answer: very high
Correct Answer: Agree
Correct Answer: to time the spark
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: 100
Correct Answer: absorb excess neutrons
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