ASE A5 Brakes Test | 2023 | Questions with 100% Correct Answers | Updated & Verified

A hydro-boost brake system has reduced braking performance. Technician A says to check the power steering system. Technician B says to check the vacuum check valve. Who is correct? - TECH A is correct. The power steering pump produces pressure for the Hydro-Boost unit. A vehicle with power assisted brakes has a hard brake pedal. Which of the following is LEAST likely to cause this condition? A. Master cylinder. B. Vacuum check valve. C. Brake booster. D. Low manifold vacuum. - Answer A is correct. Faulty master cylinders do not typically result in a hard brake pedal. Actually it's more common for a faulty master cylinder to cause a low brake pedal that fades to the floor as it is applied. This is the least likely component listed to result in a hard brake pedal. A vehicle pulls to the left only when the brakes are applied. This condition is MOST likely caused by: A. A seized left front caliper. B. A restriction in the left front brake line. C. Leaking master cylinder cup seals.