Automobile Engineering in ME
Which one of the following statement correctly describes the construction of a bevel gear type differential?

The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.
The left side gear and the differential carrier rotate in constant unison.
The differential carrier houses differential pinion gears and side gears.
The drive shafts are splined to the differential carrier.

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

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

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