IC Engine Questions and Answers – Air Standard Cycles

This set of IC Engines Multiple Choice Questions & Answers (MCQs) focuses on “Air Standard Cycles”.

1. The air standard efficiency of an I.C. engine depends on _____________
a) fuel used
b) speed of engine
c) compression ratio
d) none of the mentioned
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2. The specific fuel consumption per B.P. hour for a petrol engine is about ___________
a) 0.2 kg
b) 0.25 kg
c) 0.3 kg
d) 0.35 kg
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3. The specific fuel consumption per B.P. hour for a diesel engine is about ___________
a) 0.2 kg
b) 0.25 kg
c) 0.3 kg
d) 0.35 kg
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4. If the compression ratio in I.C. engine increases, then its thermal efficiency will ___________
a) increase
b) decrease
c) remain same
d) none of the mentioned
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5. The thermal efficiency of petrol and gas engines is about ___________
a) 15%
b) 30%
c) 50%
d) 70%
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6. The thermal efficiency of diesel engines is about ___________
a) 15%
b) 30%
c) 50%
d) 70%
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7. The thermal efficiency of diesel engines on weak mixtures is ___________
a) unaffected
b) lower
c) higher
d) dependent on other factors
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8. The volumetric efficiency of a well designed engine may be ___________
a) 30 to 40%
b) 40 to 60%
c) 60 to 70%
d) 75 to 90%
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9. The working medium of an air standard cycle has constant ___________ throughout the cycle.
a) pressure
b) volume
c) specific heat
d) mass
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10. It is assumed that all the processes of an air standard cycle are ___________
a) reversible
b) irreversible
c) adiabatic
d) isothermal
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Sanfoundry Global Education & Learning Series – IC Engine.

To practice all areas of IC Engine, here is complete set of 1000+ Multiple Choice Questions and Answers.