Automobile Engineering in ME
The function of anti-lock brake system (ABS) is that is

Prevents nose dives during braking and thereby postpones locking of the wheels
Maintains directional control during braking by preventing the wheels from locking
Minimizes the brake fade
Reduces the stopping distance

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Automobile Engineering in ME
The compression ratio in petrol engine is kept less than in Diesel engine because

It is just customary to have less compression ratio in petrol engines
Less compression ratio gives better performance
Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
It makes petrol engines lighter

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