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Internal Combustion Engines

Internal Combustion Engines
The following volume of air is required for consuming 1 liter of fuel by a four stroke engine

910 m3
1 m3
56 m3
5 m3

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Internal Combustion Engines
A diesel engine has compression ratio from

6 to 10
25 to 40
10 to 15
15 to 25

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Internal Combustion Engines
The higher combustion chamber wall temperature in compression ignition engines will _________ knocking tendency.

Increase
Not effect
None of these
Reduce

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Internal Combustion Engines
The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be

Higher
None of the listed here
Remain unaffected
Lower

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Internal Combustion Engines
Alpha-methyl-naphthalene (C₁₁ H₁₀) has a cetane number of

100
120
50
0

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Internal Combustion Engines
The air standard efficiency of an I.C. engine is given by (where r = Compression ratio, and γ = Ratio of specific heats)

None of these
1 + rγ - 1
1 - (1/rγ - 1)
1 - rγ - 1

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