Automobile Engineering in ME
The characteristic that is enhanced by the honing of cylinder sleeves inner surface is

Lubrication performance
Cooling efficiency
None of these
Resistance to wear

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Automobile Engineering in ME
The main task of a battery in automobiles is to

Supply electricity to the alternator
Act as a reservoir or stabilizer of electricity
Supply electricity to the vehicle's electrical system at all times while the engine is running
Supply a large amount of power to turn the starter motor when the engine is being started

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Automobile Engineering in ME
The main function of the tread pattern on tyre is that

The tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating
The crests between the tread grooves absorb road noise
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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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
It makes petrol engines lighter
It is just customary to have less compression ratio in petrol engines
Less compression ratio gives better performance

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