Automobile Engineering in ME
The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is

Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads
Brake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads
Brake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads
Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads

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Automobile Engineering in ME
When the front wheels of a vehicle are locked during braking, then

Stopping distance becomes extremely long
Front tyres skid across the road surface, and the vehicle spins around
Rear tyres skid across the road surface, and the vehicle spins around
Driver loses control over the steering, and the vehicle continues moving in its current direction

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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
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 function of the tread pattern on tyre is that

The crests between the tread grooves absorb road noise
The tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating
The tread pattern protects the tyre's inner carcass from small stones and pieces of glass
In wet conditions, the tread grooves expel water that is drawn between the tyre and road surface

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