Automobile Engineering in ME
The gear shift lever requires two separate motions to shift gears, and the first movement

Selects the synchronizer
Operates the clutch
Meshes the gears
Moves the synchronizer

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Automobile Engineering in ME
The main feature of Macpherson strut suspension is that

Non vertical external forces are supported by the suspension arms
The assembly is slightly more complicated in design
The vertical size of the suspension can be made more compact
The unsprung mass in lighter

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Automobile Engineering in ME
The function of positive crankcase ventilation (PCV) system is that it

Feeds blow by gases to the exhaust manifold
Promotes combustion by creating a swirling movement in the air-fuel mixture
Mixes fuel with air
Returns blow by gases from the crankcase to the intake system

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