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Internal Combustion Engines

Internal Combustion Engines
A two stroke cycle engine gives ________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.

Double
Same
Half
Four times

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Internal Combustion Engines
The accumulation of carbon in a cylinder results in increase of

Effective compression ratio
Clearance volume
Ignition time
Volumetric efficiency

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Internal Combustion Engines
Iso-octane (C₈H₁₈) has octane number of

50
120
100

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Internal Combustion Engines
Air fuel ratio at which a petrol engine cannot work is

0.62569444444444
0.33402777777778
20 : 1 and less
0.41736111111111

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Internal Combustion Engines
During idling, a petrol engine requires _________ mixture.

Rich
Chemically correct
Lean
None of these

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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

264 cm3
252 cm3
248 cm3
286 cm3

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