Automobile Engineering in ME
The lubrication oil flow in an engine is in the order as

Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan
Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan
Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan
Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan

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Automobile Engineering in ME
The rigid suspension is beneficial when

Large changes in load make it necessary to have a large suspension stroke
It is desired to reduce the unsprung mass
It is desired to improve tyre to ground contact characteristics
It is desired to have more flexibility in design

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

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

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Automobile Engineering in ME
A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

Allows the steering wheel to be turned by a greater amount when steering
Makes the steering more responsive
Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion
Reduces the amount of kickback for large steering angles

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