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
Overheating of the fluid due to frequent brake application
Overcooling of the brakes during high speed driving

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Automobile Engineering in ME
The ball joints are used on the tie rod ends, because they

Improve the force transmission speed
Reduce the amount of sliding resistance
Can deal with movement of the suspension both vertically and in other directions
Reduce the amount of noise generated

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