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Mechanical Engineering Objective Questions { Internal Combustion Engines }



36. The process of breaking up or a liquid into fine droplets by spraying is called
A.Vaporization
B.Atomisation
C.Ionisation
D.Injection

37. As a result of detonation in an I.C. engine, following parameter attains very high value
A.Peak pressure
B.Rate of rise of pressure
C.Rate of rise of temperature
D.Peak temperature

38. Which of the following statements is correct?
A.All the irreversible engines have samc efficiency
B.All the reversible engines have same efficiency
C.Both Rankine and Carnot cycles have same efficiency between same temperature limits
D.All reversible engines working between same temperature limits have same efficiency

39. Most high speed compression engines operate on
A.Diesel cycle
B.Otto cycle
C.Dual combustion cycle
D.Special type of air cycle

40. The accumulation of carbon in a cylinder results in increase of
A.Clearance volume
B.Volumetric efficiency
C.Ignition time
D.Effective compression ratio

41. Which of the following medium is compressed in a Diesel engine cylinder
A.Air alone
B.Air and fuel
C.Air and lub oil
D.Fuel alone

42. Pick up the false statement
A.I.C. engines ha-e higher efficiency than steam engines
B.Heavy oil engines run on diesel cycle
C.Gas engine works on Otto cycle
D.Injection of fuel by external means is not required in mixed cycle

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