Automobile Engineering in ME
In a hydraulic power steering system, the power steering pump is driven by a

Chain driven by crankshaft
Belt driven by camshaft
Belt driven by drive-shaft
Belt driven by crankshaft

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

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

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