Automobile Engineering in ME
Vulcanizing means

Heating rubber under pressure
Spraying with special paint
None of the listed here
Melting rubber while stirring it

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

Reduces the amount of kickback for large steering angles
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
Makes the steering more responsive

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