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Mechanical Engineering Objective Questions { Internal Combustion Engines }



8. The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is
A.Same
B.Less
C.More
D.More or less depending on power rating

9. The calorific value of gaseous fuels is expressed in terms of
A.Kcal
B.Kcal/kg
C.Kcal/m2
D.Kcal/m3

10. If the intake air temperature of I.C. engine increases, its efficiency will
A.Increase
B.Decrease
C.Remain same
D.Unpredictable

11. All heat engines utilise
A.Low heat value of oil
B.High heat value of oil
C.Net calorific value of oil
D.Calorific value of fuel

12. An engine indicator is used to determine the following
A.Speed
B.Temperature
C.Volume of cylinder
D.M.E.P. and I.H.P.

13. Fuel oil consumption guarantees for I.C. engine are usually based on
A.Low heat value of oil
B.High heat value of oil
C.Net calorific value of oil
D.Calorific value of fuel

14. If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the %age increase in efficiency will be
A.2%
B.4%
C.8%
D.14%

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