Automobile Engineering in ME
A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it

Makes the steering more responsive
Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion
Allows the steering wheel to be turned by a greater amount when steering
Reduces the amount of kickback for large steering angles

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Automobile Engineering in ME
The function of a second ring is that it is a

Cushion ring which prevents piston slap and knock
Back up compression ring which will work in place of the top ring when it is broken
Compression ring and aids the top ring in sealing and cooling
Back up oil control ring which will work in place of the bottom ring when it is broken

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Automobile Engineering in ME
The main task of a battery in automobiles is to

Supply electricity to the vehicle's electrical system at all times while the engine is running
Act as a reservoir or stabilizer of electricity
Supply electricity to the alternator
Supply a large amount of power to turn the starter motor when the engine is being started

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