Question

technician a says that vacuum boosters use only single diaphragms to extract power from the atmospheric pressure and transmit force to the master cylinder. technician b says that a one - way vacuum check valve is used to prevent brake fluid from entering the vacuum booster. who is correct?
select one:
a. technician a
b. technician b
c. both technician a and technician b
d. neither technician a nor technician b

Explanation:

• Vacuum boosters can use single or dual diaphragms. So Technician A is wrong.
• A one - way vacuum check valve is used to maintain vacuum, not to prevent brake fluid from entering the vacuum booster. Brake fluid is prevented from entering the booster by seals. So Technician B is wrong.

Answer:

d. Neither Technician A nor Technician B