Internal Combustion Engines
A diesel engine as compared to petrol engine (both running and rated load) is

Less efficient
Other factors will decide it
Equally efficient
More efficient

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Internal Combustion Engines
As compared to air standard cycle, in actual working, the effect of variation in specific heats is to

Decrease maximum pressure and increase maximum temperature
Increase maximum pressure and maximum temperature
Increase maximum pressure and decrease maximum temperature
Reduce maximum pressure and maximum temperature

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Internal Combustion Engines
In a four stroke cycle petrol engine, the inlet valve

Opens at top dead center and closes at bottom dead center
Opens at 20° before top dead center and closes at 40° after bottom dead center
May open or close anywhere
Opens at 20° after top dead center and closes at 20° before bottom dead center

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