ASE A5 Brakes Practice Test

51. Two technicians are discussing ABS hydraulic modulators. Technician A says the inlet valve is a normally closed valve. Technician B says the outlet valve is a normally open valve. Who is correct?

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

51.

Answer A is wrong. The inlet valve is a normally open valve. Symptoms of bad solenoid valves include a pull during emergency braking and a low brake pedal.

Answer B is wrong. The outlet valve is normally closed.

Answer C is wrong. Neither technician is correct.

Answer D is correct. Neither technician is correct.

52. 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

52.

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.

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

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

53.

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.

54. 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.

54.

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.

55. Which of the following can result from over-tightening a wheel?

  • A. Stud damage.
  • B. Brake rotor damage.
  • C. Both A and B
  • D. Neither A or B

55.

Answer A is wrong. Wheel studs can become stripped if over tightened.

Answer B is wrong. Over-torquing a wheel can result in brake rotor warpage.

Answer C is correct. Both A and B are correct.

Answer D is wrong. Both A and B are correct.