ASE A5 Brakes Practice Test
1. A pulsation is felt in the steering wheel only when the brakes are applied. Which of the following is most likely causing this condition?
- A. An out-of-round tire.
- B. Front rotor lateral runout.
- C. A cupped tire.
- D. Warped rear rotors.
Answer A is wrong. Use a dial indicator to measure lateral runout.
Answer B is correct. The pulsation caused by excessive front rotor runout is felt more in the steering wheel. Distorted or "warped" rear rotors are felt mostly in the seat.
Answer C is wrong. Answer B is correct.
Answer D is wrong. Answer B is correct.
2. A vehicle with four-wheel disc brakes, ABS, and a vacuum brake booster has a hard brake pedal and an increased stopping distance. Which of the following is causing this condition?
- A. Bypassing master cylinder cup seals.
- B. A faulty brake booster.
- C. Worn brake pads.
- D. Air in the brake lines.
Answer A is wrong. Bypassing master cylinder internal seals causes a low brake pedal that fades to the floor.
Answer B is correct. Symptoms of a faulty or leaking brake booster include a hard brake pedal, increased pedal effort, and an extended stopping distance.
Answer C is wrong. Worn brake pads result in a squeal when braking.
Answer D is wrong. Air in the brake lines results in a soft spongy brake pedal.
3. A vehicle drifts to the right while driving forward. Which of these could be the cause?
- A. A seized left front caliper.
- B. A restriction in the left front brake line.
- C. Leaking master cylinder cup seals.
- D. Sticking right front caliper slide pins.
Answer A is wrong. A frozen left front caliper will cause the vehicle to pull to the right when braking.
Answer B is wrong. A restriction in the left front brake line will cause the left front brake to drag after the brakes are released.
Answer C is wrong. Leaking master cylinder cup seals result in an internal leak, causing pressure loss and the pedal to fade to the floor when braking.
Answer D is correct. The slide pins can stick in their bores, preventing sufficient braking force and causing the brake pad to drag and wear prematurely. As a result, while driving forward, the vehicle will drift or pull to the side with the dragging front brake.
4. The brake shoes on a self-energizing drum brake system require replacement. All of the following statements are correct about replacing these brake shoes EXCEPT:
- A. The primary shoe faces the front of the vehicle.
- B. The secondary shoe has a shorter brake shoe lining.
- C. The secondary shoe faces the rear of the vehicle.
- D. Shoe lining can be riveted or glued to the shoe.
Answer A is wrong. The primary shoe faces the front of the vehicle.
Answer B is correct. The shoe with the shorter lining (the primary shoe) faces the front of the vehicle. Reversing the primary and secondary brake shoes results in noise, possible wheel lockup, and a pull to one side while driving forward.
Answer C is wrong. The secondary shoe faces the rear of the vehicle.
Answer D is wrong. Shoe lining can be riveted or glued to the shoe. Click or tap the Read more... button for an illustrated explanation.
5. A customer states the TCS traction control system's warning light sometimes flashes while accelerating from a stoplight. Technician A says the TCS system controls wheel spin while accelerating on slippery surfaces. Technician B says it is normal for the warning light to flash when the system is active. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
Answer A is wrong. The TCS traction control system controls wheel slip and loss of traction during hard and sudden acceleration by reducing engine speed or applying individual brake units.
Answer B is wrong. A flashing TCS light is a normal response to slippery road conditions. It indicates the system is activated and restoring traction to the wet or icy road surface.
Answer C is correct. Both technicians are correct.
Answer D is wrong. If the ABS and traction control light illuminate continuously, the system should be inspected and scanned for codes.