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 ball joints are used on the tie rod ends, because they

Reduce the amount of sliding resistance
Reduce the amount of noise generated
Can deal with movement of the suspension both vertically and in other directions
Improve the force transmission speed

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