Discussion
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- Question
During suction stroke of a four stroke petrol engine, the inlet valve opens and the charge is sucked into the cylinder as the piston moves upwards from the bottom dead centre.
Options- A. True
- B. False
- Correct Answer
- False
- 1. The object of providing masked inlet valve in the air passage of compression ignition engines is to
Options- A. enhance flow rate
- B. control air flow
- C. induce primary swirl
- D. induce secondary turbulence Discuss
- 2. Thermal efficiency of a two stroke cycle engine is __________ a four stroke cycle engine.
Options- A. equal to
- B. less than
- C. greater than Discuss
- 3. The fuels in order of decreasing knock tendency for spark ignition engines are
Options- A. paraffins, aromatics, napthenes
- B. paraffins, napthenes, aromatics
- C. napthenes, aromatics, paraffins
- D. napthenes, paraffins, aromatics Discuss
- 4. A supercharged engine as compared to an ordinary engine
Options- A. is lighter
- B. requires smaller foundations
- C. consumes less lubricating oil
- D. all of these Discuss
- 5. The brake power (B.P.) of the engine is given by (where W = Brake load or dead load in newtons, l = Length of arm in metres, N = Speed of engine in r.p.m., S - Spring balance reading in newtons, D = Dia. of brake drum in metres, and d = Dia. of rope in metres)
Options- A.
- B.
- C.
- D. all of these Discuss
- 6. A petrol engine has compression ratio from
Options- A. 6 to 10
- B. 10 to 15
- C. 15 to 25
- D. 25 to 40 Discuss
- 7. The ratio of the indicated thermal efficiency to the air standard efficiency is known as
Options- A. mechanical efficiency
- B. overall efficiency
- C. volumetric efficiency
- D. relative efficiency Discuss
- 8. The firing order in an I.C. engine depends upon
Options- A. arrangement of the cylinders
- B. design of crankshaft
- C. number of cylinders
- D. all of these Discuss
- 9. The relative efficiency of an I.C. engine is the ratio of the indicated thermal efficiency to the air standard efficiency.
Options- A. Correct
- B. Incorrect Discuss
- 10. A diesel engine has inlet valve, fuel injection valve and exhaust valve.
Options- A. Yes
- B. No Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: induce primary swirl
Correct Answer: less than
Correct Answer: paraffins, napthenes, aromatics
Correct Answer: all of these
Correct Answer: all of these
Correct Answer: 6 to 10
Correct Answer: relative efficiency
Correct Answer: all of these
Correct Answer: Correct
Correct Answer: Yes
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