Automobile Engineering in ME
During suction stroke, the inside pressure of cylinder is

Less than the atmospheric pressure
More than the atmospheric pressure
Equal to the atmospheric pressure
None of the listed here

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Automobile Engineering in ME
The function of a first compression ring (top ring) is that it

Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber
Increases the combustion temperature
Creates swirl
Maintains a seal and prevents the fuel leakage

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