ASE A5 Brakes Practice Test

56. Technician A says an outside micrometer is the preferred tool for measuring rotor lateral runout. Technician B says a dial indicator is the preferred tool used for measuring 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. A 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 as inputs for (TCS) traction 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 travelling in a lateral direction (skidding sideways).

Answer B is wrong. 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 all inputs to the (TCS) Traction Control System.

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 good 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 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 ΒΌ 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 only 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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