What is the purpose of the check valve in a vacuum power brake system?

A) It allows vacuum to the booster.
B) It stops the release of vacuum from the booster back to the engine.
C) Both A and B are correct
D) Neither A nor B is correct

Check Valve

A valve that allows fluid to flow through it in only one direction, preventing backflow.

Vacuum Power Brake

A brake booster that uses a vacuum to multiply the force the driver applies to the brake pedal, reducing effort and improving response.

Vacuum Booster

A device that uses engine vacuum to increase the force applied to the brake pedal, thereby enhancing braking power and efficacy.