ASE A5 Brakes Practice Test

11. Which of the following brake fluids are silicone based.

  • A. Dot 2
  • B. Dot 3
  • C. Dot 4
  • D. Dot 5

11.

Answer A is wrong. Only Dot 5 is silicon based.

Answer B is wrong. Only Dot 5 is silicon based.

Answer C is wrong. Only Dot 5 is silicon based.

Answer D is correct. Dot 5 brake fluid is silicon based.

12. A vehicle stops but the brake pedal fades completely to the floorboard afterwards. There are no external leaks. Which of these is the MOST likely cause of this condition.

  • A. Faulty vacuum brake booster.
  • B. Clogged vacuum booster check valve.
  • C. Dark discolored brake fluid.
  • D. Master cylinder cup seals.

12.

Answer A is wrong. A faulty brake booster results in no or little brake assist resulting in a hard brake pedal.

Answer B is wrong. A clogged brake booster check valve will result in a hard brake pedal. The vacuum booster will be deprived of vacuum.

Answer C is wrong. This is not the most likely cause. This will result in a low and spongy brake pedal. A brake fluid flush will be necessary.

Answer D is correct. Master cylinder cup seals wear and create an internal leak. The pedal fades to the floor as fluid bypasses the seal.

13. Two technicians are inspecting a brake drum for wear. Technician A says if the brake drum has small cracks along it's inside lining it should be replaced. Technician B says if a brake drum has minor pitting along it's inside lining it may be resurfaced. Who is correct?

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

13.

Answer A is wrong. When a brake drum has cracks it must be replaced.

Answer B is wrong. When a drum shows signs of pitting and heat scoring, it may be resurfaced.

Answer C is correct. Both technicians are correct.

Answer D is wrong. Both technicians are correct.

14. The brake shoes on the rear of a vehicle are worn and must be replaced. Technician A says the primary shoe faces the front of the vehicle. Technician B says the lining of the primary shoe must be riveted to the shoe plate. Who is correct?

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

14.

Answer A is correct. The primary faces the front; it typically has a shorter lining.

Answer B is wrong. Brake shoe manufacturers will also use glue to bond the lining to the shoe.

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

15. Rust and corrosion have damaged the brake lines on the axle of a light truck and caused them to leak fluid. These brake lines cannot be repaired and must be replaced. Technician A says double flare copper tubing is used for brake lines. Technician B says single flare steel tubing is used for brake lines. Who is correct?

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

15.

Answer A is wrong. Copper tubing isn't used in automotive brake systems. It can burst under the extreme pressures.

Answer B is wrong. Double flare stainless steel tubing is used in today's brake line.

Answer C is wrong. Neither technician is correct.

Answer D is correct. Neither technician is correct.