ASE A5 Brakes Practice Test
1. There is a pulsation 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 a vacuum booster has a hard brake pedal. Which of the following is LEAST likely to cause this condition?
- A. The master cylinder.
- B. The vacuum check valve.
- C. A clogged check valve hose.
- D. Low manifold vacuum.
Answer A is correct. Faulty master cylinders do not typically result in a hard brake pedal. It is more common for a faulty master cylinder to cause a low brake pedal that fades to the floor.
Answer B is wrong. A faulty vacuum check valve will result in a hard brake pedal.
Answer C is wrong. A clogged check valve hose will result in a hard brake pedal.
Answer D is wrong. Low intake manifold pressure will result in a hard brake pedal. Answers B, C, and D are all parts of the vacuum assist brake system.
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. All of the following statements are correct about brake shoe replacement 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.
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.
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 that 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, then the system should be inspected and scanned for codes.