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

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

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Automobile Engineering in ME
The order in which effort applied to the steering wheel is transferred to the front wheel is

Steering wheel, tie rod, steering gearbox, steering shaft, steering knuckle, front wheels
Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels
Steering wheel, steering shaft, steering gearbox, tie rod, steering knuckle, front wheels
Steering wheel, steering gearbox, steering shaft, tie rod, steering knuckle, front wheels

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