Automobile Engineering in ME
The auto ignition in a spark ignition engine means

Ignition of the charge before the passage of flame front
Ignition induced by the passage of a spark
Ignition induced to supplement the process of normal combustion
Automatic ignition of the charge at the end of compression

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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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Automobile Engineering in ME
Incorrect steering axis inclination (S.A.I.) causes

Tendency to assume toe-out orientation
The vehicle to pull to the side of lesser inclination
Generation of a braking effect at tight corners
Poor recovery of the steering wheel after making a turn

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