Automobile Engineering in ME
The characteristic that is enhanced by the honing of cylinder sleeves inner surface is

Lubrication performance
Cooling efficiency
Resistance to wear
None of these

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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
Maintains a seal and prevents the fuel leakage
Creates swirl
Increases the combustion temperature

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