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Internal Combustion Engines

Internal Combustion Engines
A mixture containing 65% of iso-octane and 35% of normal heptane will have

Octane number 65
Cetane number 65
Cetane number 35
Octane number 35

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Internal Combustion Engines
If the temperature of intake air in internal combustion engine increases, then its efficiency will

Decrease
Increase
None of the listed here
Remain same

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Internal Combustion Engines
The minimum cranking speed in case of petrol engine is about

60 - 80 rpm
Half the operating speed
One fourth of operating speed
250 - 300 rpm

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Internal Combustion Engines
High speed compression engines operate on

Dual combustion cycle
Otto cycle
Diesel cycle
All of these

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Internal Combustion Engines
In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will _________ the knocking tendency.

Decrease
None of these
Increase
Not effected

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Internal Combustion Engines
The volumetric efficiency of a well designed engine may be

60 to 70%
30 to 40%
40 to 60%
75 to 90%

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MORE MCQ ON Internal Combustion Engines

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