ASE A5 Brakes Practice Test

21. The front brakes of a vehicle with a front disc, rear drum brake system skid when the brakes are first applied. Which of the following is causing this condition?

  • A. Proportioning valve.
  • B. Metering valve.
  • C. Pressure differential switch.
  • D. Contaminated brake fluid.

21.

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

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. The pressure differential switch warns the driver of a possible hydraulic leak in the system.

Answer D is wrong. Contaminated brake fluid would affect both front and rear brakes.

22. A vehicle's brake lights are inoperative and do not illuminate when the brake pedal is depressed. Technician A says a stuck closed brake switch results in this condition. Technician B says to check the circuit for a blown fuse. Who is correct?

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

22.

Answer A is wrong. A stuck closed brake switch completes the circuit and results in brake light illumination at all times, even without pressing the pedal.

Answer B is correct. If both brake lights are out, start troubleshooting with a quick check of the circuit's fuse.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.

23. A vehicle with four-wheel disc brakes has self-contained drum parking brakes. Technician A says a binding cable can prevent parking brake application. Technician B says the brake shoes are located inside the hub of the rear disc brake rotors. Who is correct?

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

23.

Answer A is wrong. A binding or misadjusted parking brake cable can prevent application.

Answer B is wrong. An self-contained parking brake system has a small drum brake system that operates inside the hub of the rear brake rotors.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

24. Two technicians are discussing an EPB electric parking brake system. Technician A says all EPB systems require periodic brake cable adjustments. Technician B says many electric parking brake systems require a manufacturer-specific procedure before installing new brake pads. Who is correct?

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

24.

Answer A is wrong. There are two types. Cable-puller EPB parking brakes that use cables that can stretch and require periodic checks and adjustments. Caliper-integrated EPB parking brakes are fastened to the brake caliper and have no cables to adjust.

Answer B is correct. Check for special procedures. Electric parking brakes require a manufacturer-specific procedure before brake pad replacement. The procedure depends on the vehicle. A scan tool is often required to place the system in service or maintenance mode before replacing the pads.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.

25. A technician measures the inside diameter of a brake drum with a brake drum micrometer. The technician should use which of the following measurements?

  • A. The smallest measurement.
  • B. A brake drum micrometer is not used.
  • C. The average of all the measurements.
  • D. The largest measurement.

25.

Answer A is wrong. When measuring the inside of a brake drum, use the largest, not the smallest measurement.

Answer B is wrong. A brake drum inside micrometer is used to take this measurement.

Answer C is wrong. Use the largest measurement because the inside wears making the inside diameter larger.

Answer D is correct. Compare to the MAX "maximum diameter" stamped on the outside of the drum.