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Internal Combustion Engines

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
Not effected
Increase

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Internal Combustion Engines
High speed compression engines operate on

Otto cycle
Diesel cycle
All of these
Dual combustion cycle

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Internal Combustion Engines
Crankcase explosion in I.C. engines usually occurs as

Never occurs
Both mild and big explosions occurs simultaneously
First a mild explosion followed by a bi explosion
First a big explosion followed by a mil explosion

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Internal Combustion Engines
The air requirement of a petrol engine during starting compared to theoretical air required for complete combustion is

Less
Same
May be more or less depending on engine capacity
More

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Internal Combustion Engines
A gas engine has a swept volume of 300 cm3 and clearance volume of 25 cm3. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is

248 cm3
264 cm3
286 cm3
252 cm3

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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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MORE MCQ ON Internal Combustion Engines

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