Automobile Engineering in ME
The two kinds of piston rings are

Compression and sliding seal rings
Oil scrapper and oil control rings
Pressure and sealing rings
Compression and oil control rings

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Automobile Engineering in ME
The condition that causes vapour locking in a brake system is

Overheating of the fluid due to frequent brake application
An excessively high engine speed on a downhill road
Overcooling of the brakes during high speed driving
Keeping the vehicle without use for an extended period

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Automobile Engineering in ME
The correct flow of power through the drive train is

Engine clutch, main shaft, counter shaft, final driven gear, drive shafts, wheels
Engine main shaft, counter shaft, clutch, final driven gear, drive shafts, wheels
Engine drive shafts, clutch, main shaft, counter shaft, final driven gear, wheels
Engine clutch, counter shaft, main shaft, final driven gear, drive shafts, wheels

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Automobile Engineering in ME
The rigid suspension is beneficial when

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

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