Automobile Engineering in ME
The condition that causes vapour locking in a brake system is

Keeping the vehicle without use for an extended period
An excessively high engine speed on a downhill road
Overcooling of the brakes during high speed driving
Overheating of the fluid due to frequent brake application

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

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

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