Automobile Engineering in ME
The effect of vapour locking on the brake performance is that the

Brakes function more effectively
Brake operation is delayed after depression of the brake pedal
Brakes fail completely
Vapour locking has no effect on brake performance

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Automobile Engineering in ME
When the front wheels of a vehicle are locked during braking, then

Stopping distance becomes extremely long
Driver loses control over the steering, and the vehicle continues moving in its current direction
Rear tyres skid across the road surface, and the vehicle spins around
Front tyres skid across the road surface, and the vehicle spins around

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