Automobile Engineering in ME
The main function of an exhaust muffler is the

Reduction of the exhaust gas volume
Reduction of exhaust noise
Reduction of nitrogen oxide in the exhaust gases
Optimization of exhaust efficiency

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

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