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

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

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Automobile Engineering in ME
The rigid suspension is beneficial when

Large changes in load make it necessary to have a large suspension stroke
It is desired to improve tyre to ground contact characteristics
It is desired to have more flexibility in design
It is desired to reduce the unsprung mass

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