ASE A5 Brakes Practice Test

56. A vehicle with a front disc, rear drum brake system skids, and nosedives when the brakes are first applied. Which of the following is causing this condition?

  • A. The pressure differential switch.
  • B. The metering valve.
  • C. The proportioning valve.
  • D. Aerated brake fluid.

56.

Answer A is wrong. The pressure differential switch warns the driver of a possible hydraulic leak in the system.

Answer B is correct. The metering valve delays hydraulic pressure to the front brakes and allows the system to overcome rear drum spring tension. The metering valve helps achieve balanced braking.

Answer C is wrong. A proportioning valve controls pressure to the rear brakes. It's used to prevent rear-wheel lockup.

Answer D is wrong. Aerated brake fluid causes a spongy pedal and affects the front and rear brakes.

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57. The red brake warning light is illuminated on the instrument panel of a vehicle with four-wheel disc brakes. Which of these is LEAST likely to cause this warning light to illuminate?

  • A. Low brake fluid level.
  • B. Unequal brake fluid pressure.
  • C. Grounded parking brake circuit.
  • D. Loose wheel speed sensor plug.

57.

Answer A is wrong. Low fluid level illuminates the red brake light. Check the brake fluid level and the reservoir cap if there's a red warning light.

Answer B is wrong. The pressure differential switch activates the red brake warning light if there is unequal fluid pressure.

Answer C is wrong. The red warning light indicates a problem with the hydraulic system or parking brake engagement.

Answer D is correct. A loose wheel speed sensor plug would illuminate the yellow warning light.

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58. The right brake light is inoperative when the brake pedal is depressed. All the other lights function correctly. Which of the following could be the cause?

  • A. The right rear bulb socket.
  • B. The right rear bulb.
  • C. The brake light fuse.
  • D. Both A and B.

58.

Answer A is wrong. Only because both answers A and B are correct. Check the bulb and the socket for proper fit and operation.

Answer B is wrong. The right rear bulb and socket should be inspected.

Answer C is wrong. The fuse protects the entire circuit. The left brake light circuit would also be inoperative if the fuse were loose or blown.

Answer D is correct. Both A and B are correct. Check the socket and the bulb for operation and resistance.

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59. The manufacturer recommends a burnishing procedure after replacing the vehicle's brake pads and rotors. Technician A says the procedure requires several hard, high-speed stops. Technician B says this process includes many light applications of the brake pedal and a brief cool-down period between stops. Who is correct?

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

59.

Answer A is wrong. Technician B is correct. The procedure involves smooth, easy stops from 30 mph, not hard stops from 55 mph.

Answer B is correct. The burnishing or break-in procedure cures the friction materials in the pads. It sets the pads to the rotors and provides better braking performance and a noise-free brake job.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.

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60. A vehicle’s brake pedal pulsates and the ABS system activates at low speeds. Technician A says this could be caused by a weak wheel speed sensor signal. Technician B says rust and corrosion on and around the wheel speed sensor mounting will result in this condition. Who is correct?

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

60.

Answer A is wrong. The frequency and amplitude of this signal increase as wheel speed increases. A weak low‑amplitude (voltage) signal will affect ABS operation.

Answer B is wrong. Rust buildup on the steering knuckle or mounting surface can increase this gap, leading to erratic and unwanted ABS operation—especially at low speeds.

Answer C is correct. Both technicians are correct. Wheel speed sensors can be either passive or active. The air gap between a passive wheel speed sensor and the reluctor ring is critical.

Answer D is wrong. When the ABS control module detects a faulty wheel speed sensor, it disables the Anti‑lock Brake System and illuminates the ABS warning light.

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