Vacuum power brakes are being discussed. Technician A says vacuum on both sides of the diaphragm doubles the amount of force on the master cylinder pistons. Technician B says the return spring forces the diaphragm to the forward position when there is vacuum on both sides of the diaphragm. Who is correct?

Question

Quizplus · Accepted Answer

Vacuum on both sides of the diaphragm does not double the force; it neutralizes the force, and the return spring does not move the diaphragm forward when vacuum is equal on both sides.

Vacuum Power Brakes Are Being Discussed