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
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
Diesel engine compresses air alone instead of an air-fuel mixture

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Automobile Engineering in ME
The ball joints are used on the tie rod ends, because they

Can deal with movement of the suspension both vertically and in other directions
Reduce the amount of noise generated
Improve the force transmission speed
Reduce the amount of sliding resistance

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Automobile Engineering in ME
The drive-shafts are connected to the differential and wheel hubs through universal joints because the universal joints

Absorb any difference in speed between the left and right wheels when the vehicle is turning
Compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions.
None of these
Absorb the vibrations transferred from the surface of the road

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