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.
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 gives the system a chance 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.
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.
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. Answer D is correct because a loose wheel speed sensor plug would illuminate the amber warning light instead of the red brake warning light.
58. The right brake light is inoperative when the brake pedal is depressed. All the other lights function correctly. Which of the following would cause this inoperative brake light?
- A. The right rear bulb socket.
- B. The right rear bulb.
- C. The brake light fuse.
- D. Both A and B.
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.
59. The manufacturer recommends performing a burnishing procedure after brake pad installation. Technician A says to burnish brake pads make several hard high speed stops. Technician B says this process includes light application 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
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 provides for better braking performance.
Answer C is wrong. Technician B is correct.
Answer D is wrong. Technician B is correct.
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.
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.