Internal Combustion Engines
The pressure and temperature at the end of compression stroke in a petrol engine are of the order of

6-12 kg/cm² and 250-350°C
4-6 kg/cm² and 200-250°C
12-20 kg/cm² and 350-450°C
20-30 kg/cm² and 450-500°C

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Internal Combustion Engines
For the same compression ratio

Otto cycle is more efficient than the Diesel
Compression ratio has nothing to do with efficiency
Both Otto and Diesel cycles are, equally efficient
Diesel cycle is more efficient than Otto

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Internal Combustion Engines
Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine?

Inlet valve opening before top dead center
Inlet valve closing before bottom dead center
Exhaust valve closing after top dead center
Inlet valve closing after bottom dead center

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