Automobile Engineering in ME
The function of a second ring is that it is a

Back up oil control ring which will work in place of the bottom ring when it is broken
Compression ring and aids the top ring in sealing and cooling
Cushion ring which prevents piston slap and knock
Back up compression ring which will work in place of the top ring when it is broken

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Automobile Engineering in ME
Incorrect steering axis inclination (S.A.I.) causes

Generation of a braking effect at tight corners
Poor recovery of the steering wheel after making a turn
Tendency to assume toe-out orientation
The vehicle to pull to the side of lesser inclination

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