ASE A5 Brakes Actual Test with Answers and Rationale | Latest 2023/2024

ASE A5 Brakes Actual Test with Answers and Rationale | Latest 2023/2024 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. D. A seized right front caliper. -- Answer D is correct. A frozen right front caliper will cause the vehicle to pull to the left when braking. Technician A says accumulators are found only on non-integral ABS systems. Technician B says some integral ABS units contain high pressure accumulators that must be discharged before repair. Who is correct? -- TECH B is correct. High pressure units can be dangerous and must be discharged before removal. Always check with manufacturer's procedures before disassembling an ABS unit Technician A says ABS control units are programmed to ignore speed sensor input variations below a certain threshold. Technician B says a one-channel ABS system controls hydraulic pressure to the rear brake units. Who is correct? -- Both technicians are correct. A vehicle's right front wheel has a growl that increases with vehicle speed. The MOST likely cause is: A. Excessive rotor lateral run out. B. Warped rear brake drums. C. Worn CV-Joint.