ASE A5 Brakes Practice Test

36. The front brake pads on a vehicle with a quick take up master cylinder need replacement. They were replaced just recently. Technician A says this is a low drag brake system. Technician B says this could be caused by a sticking quick take up valve. 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. This type of master cylinder is used with low drag brake calipers. It is distinguishable by a large diameter piston and primary low pressure bore located at the back or push rod end of the master cylinder.

Answer B is wrong. Both technicians are correct. The quick take up master cylinder provides more brake fluid volume to take up the additional space between the pads and the rotor. They are fuel efficient.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

37. Technician A says electronic stability control systems require four wheel speed sensors. Technician B says the telltale lamp will flash when the ESC system is activated. Who is correct?

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

37.

Answer A is wrong. These systems must be able to apply all four wheels individually. The vehicle is equipped with a four channel ABS system with a wheel sensor dedicated to each wheel.

Answer B is wrong. The telltale lamp will flash when the system is active and will turn off when stability is regained. It will stay on if a malfunction exists.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

38. Which of these is not part of an integral ABS unit.

  • A. Hydraulic Booster
  • B. Master Cylinder
  • C. Hydraulic Modulator
  • D. Vacuum Booster

38.

Answer A is wrong. The hydraulic booster is part of an integrated or integral ABS system.

Answer B is wrong. The master cylinder is part of in integrated or integral ABS system.

Answer C is wrong. The hydraulic modulator is part of in integrated or integral ABS system.

Answer D is correct. The vacuum booster is not part of in integrated or integral ABS system.

39. The left front inner most pad on a four wheel disk brake system is excessively worn. The outside pad has little wear. Which if these has caused this uneven pad wear.

  • A. Proportioning valve.
  • B. Metering valve.
  • C. Brake caliper slide pins.
  • D. Uneven rotor thickness.

39.

Answer A is wrong. The proportioning valve controls brake pressure to the rear brakes to prevent wheel lockup.

Answer B is wrong. The metering valve helps provide balanced braking.

Answer C is correct. Sticking brake caliper slide pins result in inboard pad wear. This is because the floating or outside brake pad/unit is unable to apply its clamping force on the rotor.

Answer D is wrong. Uneven rotor thickness, parallelism or warped rotors result in brake pedal pulsation. A vibration will be felt more in the steering wheel when the front rotors are warped.

40. Two technicians are discussing a customer's complaint about a traction control system’s amber TCS warning light that flashes intermittently. Technician A says if the amber TCS light flashes while driving in poor weather conditions, there is an electrical fault in the system. Technician B says these systems require an electric pump and accumulator. Who is correct?

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

40.

Answer A is wrong. This is a normal response to slippery road conditions. It indicates that the system is activated and restoring traction to the slippery road surface.

Answer B is correct. TCS systems use an electric pump and accumulator to apply the brake on the wheel that's lost its traction.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.