ASE A5 Brakes Practice Test

56. Technician A says to use an outside micrometer to measure rotor lateral runout. Technician B says to use a dial indicator to measure rotor thickness. Who is correct?

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

56.

Answer A is wrong. Neither Technician A or B is correct.

Answer B is wrong. Neither Technician A or B is correct.

Answer C is wrong. Neither Technician A or B is correct.

Answer D is correct. It's the other way around. An outside micrometer is used for measuring rotor thickness. A dial indicator is used to measure lateral runout.

57. Which of the following input sensors are used by the traction and stability control systems?

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

57.

Answer A is wrong. The Yaw Rate sensor senses if the vehicle is traveling in a lateral direction (skidding sideways).

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

Answer C is wrong. The wheel speed sensors indicate the difference in wheel speed rotation.

Answer D is correct. They are sensor inputs for the traction and stability control systems.

58. A technician is lubricating rubber brake components while performing a brake job. Technician A says to use a high-temperature silicon-based lubricant. Technician B says to use a petroleum-based lubricant. Who is correct?

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

58.

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 resulting in brake unit failure.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

59. A technician is testing a vehicle with a vacuum assist brake booster. After pumping the brake pedal several times and starting the engine, the pedal drops toward the floor about ¼ of an inch. 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.

59.

Answer A is correct. This is normal.

Answer B is wrong. This test is for the brake booster.

Answer C is .wrong A faulty master cylinder usually results in a soft brake pedal that fades to the floor.

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

60. The red brake warning light on the instrument panel illuminates when the brakes are applied. Which of the following results in this condition?

  • A. A burned brake light bulb.
  • B. Air in the hydraulic brake system.
  • C. A damaged wheel speed sensor tone ring.
  • D. An open in the brake switch circuit.

60.

Answer A is wrong. Some vehicles have a brake light failure indicator. This is typically amber. A burned brake light bulb will not illuminate the red brake warning light.

Answer B is correct. The red brake warning light will illuminate if there's a loss in pressure in one of the two hydraulic brake circuits, if the parking brake is engaged, or if the key is in the ON/RUN position.

Answer C is wrong. If the ABS controller senses a damaged tone ring by an erratic wheel speed sensor signal, it will illuminate the amber ABS light.

Answer D is wrong. The brake lights would not illuminate if there's an open in the brake switch.

ASE A5 Brakes Quiz
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