ASE A5 Brakes Practice Test
51. During a test drive an excessive vibration is felt in the steering wheel only when the brakes are applied. The front brake rotors have just been replaced for this same problem. Which of the following is MOST likely to result in this vibration.
- A. Excessive lateral runout.
- B. Rusty hub flange.
- C. This is a normal condition.
- D. Excessive thickness variation.
Answer A is wrong. Excessive lateral runout will certainly cause the vibration in the steering. The importance of inspecting components like the hub flange can not be understated. Rust or debris on the flange will result in front end vibration while braking.
Answer B is correct. Debris, rust or a bent hub flange will result in excessive front end vibration while braking.
Answer C is wrong. This is not a normal condition.
Answer D is wrong. Excessive thickness variation is not the most likely answer because the question indicates that new brake rotors have recently been installed.
52. A vehicle has a hard brake pedal at all times. Which of the following would cause this condition?
- A. Vacuum brake booster.
- B. Leaking master cylinder cup seals.
- C. Air in the lines.
- D. High manifold vacuum.
Answer A is correct. A faulty vacuum booster will result in a hard brake pedal.
Answer B is wrong. Master cylinder cup seals cause the brake pedal to fade to the floor.
Answer C is wrong. Air in the brake lines results in a soft spongy pedal.
Answer D is wrong. Low manifold vacuum would deprive a vacuum assist unit of its necessary vacuum source.
53. A vehicle nosedives while braking. Which of the following is likely to cause this condition?
- A. The metering valve.
- B. The proportioning valve.
- C. Over-adjusted brakes.
- D. Both A and B
54. A vehicle has a growling sound that changes in pitch as the vehicle is lightly swerved from left to right. The noise is loudest during left hand turns. Which of the following is MOST likely to result in this condition?
- A. A faulty LF wheel bearing.
- B. A faulty RF wheel bearing.
- C. A grabbing LF brake.
- D. A grabbing RF brake.
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