Automobile Engineering in ME
The order in which effort applied to the steering wheel is transferred to the front wheel is

Steering wheel, steering gearbox, steering shaft, tie rod, steering knuckle, front wheels
Steering wheel, tie rod, steering gearbox, steering shaft, steering knuckle, front wheels
Steering wheel, steering shaft, steering gearbox, tie rod, steering knuckle, front wheels
Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels

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Automobile Engineering in ME
It is necessary to maintain the valve clearances as they

Allow for lengthening of the valves owing to the heat of combustion
Make the crankshaft turn smoothly
Increase the speed at which the valves move up and down
Reduce the resistance to sliding that occurs between the cam and the tappet

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