Automobile Engineering in ME
The effect of vapour locking on the brake performance is that the

Vapour locking has no effect on brake performance
Brakes fail completely
Brakes function more effectively
Brake operation is delayed after depression of the brake pedal

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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

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

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