ASE A5 Brakes Practice Test

26. Two technicians are discussing brake backing plates. Technician A says if a ridge has formed on the pads where the shoes rest they may be filed to restore a smooth finish. Technician B says to apply bearing grease to reduce brake squeak. Who is correct?

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

26.

Answer A is correct. The ridge often formed by the movement of the brake shoe may be filed smooth.

Answer B is wrong. It's important to use high temperature grease between the backing plate and the shoe.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

27. A vehicle has a low brake pedal. Technician A says an improperly adjusted brake pedal could be the cause. Technician B says overheated brake fluid could cause this condition. Who is correct?

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

27.

Answer A is wrong. Both Technicians are correct.

Answer B is wrong. Both Technicians are correct.

Answer C is correct. An under adjusted brake pedal will cause a low brake pedal. Excessive heat damages brake fluid resulting in a spongy or low brake pedal.

Answer D is wrong. Both Technicians are correct.

28. A technician is lubricating rubber brake components while performing a brake job. Technician A says to use a high temperature silicon based lubricant. Technician B says to use a good petroleum based lubricant. Who is correct?

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

28.

Answer A is correct. Use high temperature silicon based lubricant that does not contain petroleum.

Answer B is wrong. Petroleum based products can cause swelling resulting in brake unit failure.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

29. Technician A says to adjust a height sensing proportioning valve while on the lift. Technician B says to adjust a height sensing proportioning valve at vehicle curb ride height. Who is correct?

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

30.

Answer A is wrong. Adjusting a height sensing proportioning valve on the lift would reduce hydraulic pressure to the rear brakes.

Answer B is correct. Adjust a height sensing proportioning valve at curb height with all four tires firm on the ground. Adjusting this type of proportioning valve on a lift would reduce rear brake performance.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.

30. The amber ABS fault light is illuminated on a vehicle's instrument panel. The vehicle contains a four channel permanent magnet sensor ABS brake system. All of these are true EXCEPT.

  • A. Oversized tires will have an adverse effect on this ABS system.
  • B. The gap between the sensor and the tone ring is critical with PM sensor operation.
  • C. Permanent magnet sensor systems function well at speeds below 5 mph.
  • D. Permanent magnet sensors and companion tone rings produce a AC frequency converted to DC pulses by the ABS controller.

30.

Answer A is wrong. Oversize tires slow the signal frequency of the wheel speed sensors.

Answer B is wrong. The gap between the sensor and the tone ring is critical. To close will damage the sensor/ring and too far will weaken the signal to the controller.

Answer C is correct. A These systems typically remain passive at lower speeds. ABS systems remain passive and are activated when a possible skid is detected, this is not likely at 5mph.

Answer D is wrong. PM sensors produce an AC signal that is converted to DC by the control module.