ASE A5 Brakes Practice Test

36. During a brake inspection one rotor is found to be much hotter than the other. Technician A says this could be caused by a sticking brake caliper. Technician B says this could be caused by the brake caliper piston seal. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B

36.

Answer A is wrong. Both technicians are correct. If the pad does not retract, the brake drags as the pad stays in contact with the rotor. This friction causes the rotor to overheat deform and warp. It can cause the vehicle to pull to the side that's dragging.

Answer B is wrong. Overhaul kits contain a new boot and seal. Square cut piston seals and other rubber components are sensitive to water, oil, and brake fluid contamination.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

37. Two technicians are discussing master cylinder residual check valves. Technician A says the check valve is used on four wheel disc brake systems. Technician B says the valve maintains pressure when the brakes are released. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B

37.

Answer A is wrong. A residual check valve is used on vehicle's with drum brakes.

Answer B is correct. It provides constant low pressure, usually 6 psi to 8 psi keeps air from entering the wheel cylinders.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.

38. It is noticed during a brake inspection of a front disc rear drum brake system that one shoe is worn more than the other. Technician A says that this is caused by a faulty residual check valve. Technician B says this is caused by a faulty proportioning valve. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B

38.

Answer A is wrong. Neither technician is correct. Wheel cylinders contain pistons that can stick, affecting brake shoe application. It may be hard to notice without inspection because the other shoe is contacting the drum and slowing the vehicle.

Answer B is wrong. Leaking seals are the most common problem found with wheel cylinders.

Answer C is wrong. Neither technician is correct.

Answer D is correct. Neither technician is correct.

39. A vehicle with ABS brakes has an audible clicking noise when it is first started. The noise goes away after a few seconds. Technician A says this is one of the hydraulic valves in the hydraulic valve assembly sticking. Technician B says this is a normal condition. Who is correct?

  • A. Technician A
  • B. Technician B
  • C. Both A and B
  • D. Neither A or B

39.

Answer A is wrong. This is a normal condition.

Answer B is correct. The ABS system runs a system check when the key is first turned to the ON position. The valves sometimes make a clicking noise during this check.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.

40. A light truck with front disc rear drum brakes rear wheels are locking up with only moderate brake application. This lock up condition is caused by a faulty:

  • A. Metering valve.
  • B. Pressure differential switch.
  • C. Proportioning valve.
  • D. Brake switch.

40.

Answer A is wrong. The metering valve delays front brake application. They provide for balanced braking.

Answer B is wrong. The pressure differential switch warns the driver of a hydraulic leak.

Answer C is correct. The proportioning valve prevents rear wheel lockup.

Answer D is wrong. The brake switch is part of the brake light system.