Automobile Engineering in ME
In radial tyres

Inner tubes are always used
All plies run parallel to one another and vertical to tyre bead
None of these
One ply layer runs diagonally one way and another layer runs diagonally the other way

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Automobile Engineering in ME
The function of a proportioning control valve (PCV) in a brake system is to

Ensure that equal pressure is supplied to the front and rear brakes throughout every braking operation
Reduce the brake fluid pressure when the brakes approach their lockup point
Cause less brake fluid pressure to act on the rear brakes than on the front brakes when the fluid pressure exceeds a predetermined level
Cause less brake fluid pressure to act on the front brakes than on the rear brakes when the fluid pressure exceeds a predetermined level

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Automobile Engineering in ME
A basic difference between the spark ignition engine and the Diesel engine is that the

Air temperature ignites the fuel in the Diesel engine
Diesel engine compresses air alone instead of an air-fuel mixture
Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke
All of these

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