ASE A5 Brakes Practice Test

1. A front wheel drive vehicle with four-wheel disc brakes pulls to the left after braking. Technician A says a kink or internal restriction in the LF brake line will result in this condition. Technician B says to use a compression fitting to repair a damaged section of brake line. Who is correct?

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

1.

Answer A is correct. The master cylinder creates more than enough pressure to bypass the kink and apply the brake. The problem is the brake caliper or wheel cylinder is unable to create enough pressure to bypass the kink and return the fluid to the master cylinder. This residual pressure keeps the brake applied at that wheel resulting in brake drag.

Answer B is wrong. Replace damaged brake line with line that’s approved by the vehicle’s manufacturer (double walled steel line), not copper.

Answer C is wrong. Technician A is correct. Compression fittings are not used to repair automotive brake lines.

Answer D is wrong. Technician A is correct.

2. The brake pad wear indicator is illuminated on the instrument panel. Technician A says this is because the brake pad's metal warning clip is in contact with the brake rotor. Technician B says this is the pad wear sensor's tip contacting the brake rotor. Who is correct?

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

2.

Answer A is wrong. The small metal clip makes a squeeling sound when it contacts the rotor.

Answer B is correct. When the electric sensor's tip contacts the rotor, the pad warning light illuminates on the instrument panel. Unfortunately, this usually means the sensor is damaged and needs replacement.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.

3. 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. A worn CV-Joint.
  • D. A worn wheel bearing.

3.

Answer A is wrong. Excessive lateral rotor run-out will result in a pulsating feeling in the brake pedal (front) or the drivers seat (rear).

Answer B is wrong. A warped brake drum is similar to a warped rotor and will result in a pulsating feeling in the brake pedal (front) or the drivers seat (rear).

Answer C is wrong. A worn CV- Joint will produce a clacking noise while cornering.

Answer D is correct. A worn wheel bearing will cause a growl that increases with vehicle speed.

4. A vehicle has a four-channel ABS brake system. The amber ABS fault light is illuminated and code C1015 indicating a problem with the RF wheel speed sensor is retrieved. All of these statements about this vehicle are true EXCEPT:

  • A. There is a sensor at each wheel.
  • B. The gap between the reluctor ring and the sensor's tip is critical.
  • C. The sensor's function is tested with a voltage meter set to AC.
  • D. The sensor requires a five-volt reference signal.

4.

Answer A is wrong. Four channel systems have four sensors, three channel systems have three...

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

Answer D is correct. They create AC voltage signals that increase with wheel speed.

5. The brake fluid level is low on a vehicle with four-wheel disc brakes. The master cylinder reservoir cap is tight, and there are no external leaks found. Technician A says the brake pad linings are worn. Technician B says the reservoir cap seal is leaking. Who is correct?

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

5.

Answer A is correct. The fluid fills the chamber behind the caliper's piston as the pad's lining wears.

Answer B is wrong. Fluid would appear on the resevoir's body if the cap seal were leaking.

Answer C is wrong. As the pads wear and move closer to the rotor, the fluid that was once in the reservoir is now taking up the extra space behind the caliper's piston.

Answer D is wrong. Answer A is correct.