IC Engine Questions and Answers – Engine Performance Parameters

This set of IC Engines Multiple Choice Questions & Answers (MCQs) focuses on “Engine Performance Parameters”.

1. The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called ___________
a) net efficiency
b) efficiency ratio
c) relative efficiency
d) overall efficiency
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2. Compression ratio of I.C. engine is ___________
a) the ratio of volumes of air in cylinder before compression stroke and after compression stroke
b) volume displaced by piston per stroke and clearance volume in cylinder
c) ratio of pressure after compression and before compression
d) swept volume/cylinder volume
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3. The air standard efficiency of an otto cycle compared to a diesel cycle for the given compression ratio is?
a) same
b) less
c) more
d) more or less depending on power rating
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4. The calorific value of gaseous fuels is expressed in terms of ___________
a) Kcal
b) Kcal/kg
c) Kcal/m²
d) Kcal/m³
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5. Indicated power of a 4-stroke engine is equal to ___________
a) pLAN
b) 2pLAN
c) pLAN/2
d) 4pLAN
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6. If the intake air temperature of I.C. engine increases its efficiency will ___________
a) increase
b) decrease
c) remain same
d) none of the mentioned
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7. All heat engines utilize ___________
a) low heat value of oil
b) high heat value of oil
c) net calorific value of oil
d) calorific value of fuel
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8. 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
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9. 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
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10. The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will ___________
a) increase
b) decrease
c) be independent
d) none of the mentioned
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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.