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.

1.

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.

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2. The traction control and stability control systems require input from which of the following sensors?

  • A. Yaw Rate Sensor
  • B. Steering Angle Sensor
  • C. Wheel Speed Sensor
  • D. All of the above.

2.

Answer A is wrong. The Yaw Rate sensor senses vehicle rotational speed around its vertical axis and informs the system when a vehicle is about to fishtail or roll sideways.

Answer B is wrong. The SAS Steering Angle sensor indicates the turning angle of the steering wheel.

Answer C is wrong. The wheel speed sensors indicate wheel speed to the control module.

Answer D is correct. They are sensor inputs for the ESP electronic stability program.

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3. Which of the following lubricants are used to lubricate rubber brake components while performing a brake job?

  • A. High Temperature Silicon-based Lubricant
  • B. Petroleum-based Lubricant
  • C. Both A and B
  • D. Neither A or B

3.

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

Answer B is wrong. Petroleum-based products can cause swelling, causing problems with rubber boots and bushings that result in sticking brake caliper slide pins.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

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4. A technician inspects the brakes on a vehicle with four-wheel disc brakes and a vacuum assist brake booster. After pumping the brake pedal several times, the technician starts the engine. The pedal drops about ΒΌ of an inch toward the floor. Which of the following statements is correct?

  • A. This is normal.
  • B. The brake booster is faulty.
  • C. The master cylinder is faulty.
  • D. There is air in the brake system.

4.

Answer A is correct. This result is normal.

Answer B is wrong. Typically, a loss of vacuum or a faulty brake booster results in a hard brake pedal.

Answer C is wrong. A faulty master cylinder is different and usually has an internal (cup seal) leak, producing a soft brake pedal that fades to the floor.

Answer D is wrong. Air in the system results in a soft brake pedal.

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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

5.

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.

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