Which of the following is a type of brake booster commonly used in vehicles?
Vacuum brake booster
A brake booster is fitted between the pedal and the master cylinder to add assisting force so the driver needs less pedal effort to stop the vehicle.
The common automotive type uses the vacuum in the engine intake manifold acting on a large diaphragm; atmospheric pressure on the other side pushes the diaphragm and boosts the pedal force.
This vacuum brake booster is standard on most petrol and diesel road vehicles because the engine readily supplies the vacuum it needs.
An electromagnetic brake booster is not the usual pedal-assist device; electromagnetic braking is a separate retarding method, not a booster.
A centrifugal type is not used for boosting brake pedal force, and a plain mechanical linkage simply transmits the effort without adding any assistance.
So the booster commonly used in vehicles is the vacuum type.
Hence, the answer is Vacuum brake booster.
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