ASE A5 Brakes Practice Test

46. A front-wheel-drive vehicle with four-wheel disc brakes pulls to the left after braking. Which of the following is MOST likely causing this pull?

  • A. A frozen RR brake caliper.
  • B. A restriction in the LR brake line.
  • C. A restriction in the RF brake line.
  • D. A kink in the LF brake line.

46.

Answer A is wrong. A frozen caliper in the RR brake assembly produces a pull while braking and noticeably uneven braking.

Answer B is wrong. Replace the damaged brake line with a line approved by the manufacturer.

Answer C is wrong. A restriction in the RF brake line causes a pull to the right after braking. If opening the bleeder relieves the fluid pressure in the caliper, check the brake line and hose for restrictions.

Answer D is correct. The master cylinder creates enough pressure to bypass the kink and apply the brake. The problem is that the brake caliper or wheel cylinder cannot generate enough force to push the brake fluid past the kink and return it to the master cylinder. This residual pressure keeps the brake applied at that wheel, resulting in brake drag.

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47. Technician A says the residual check valves keep constant pressure on the wheel cylinder cup seals. Technician B says the residual check valve maintains pressure when the brake pedal is released. Who is correct?

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

47.

Answer A is wrong. Residual check valves are used on drum brake systems to keep around 5 psi. - 12 psi. of pressure on the wheel cylinder's cup seals.

Answer B is wrong. The valve keeps constant pressure on the system; any small leaks result in fluid leaking out instead of air leaking into the system. Residual check valves keep constant pressure on the wheel cylinder's cup seals.

Answer C is correct. Residual check valves keep constant pressure on the wheel cylinder's cup seals.

Answer D is wrong. They consist of a check valve and spring inside the master cylinder port leading to the rear drum brakes.

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48. Which of these is not part of an integral ABS unit.

  • A. Hydraulic Booster
  • B. Master Cylinder
  • C. Hydraulic Modulator
  • D. Vacuum Booster

48.

Answer A is wrong. The hydraulic booster is part of an integrated or integral ABS system.

Answer B is wrong. The master cylinder is part of an integrated or integral ABS system.

Answer C is wrong. The hydraulic modulator is part of an integrated or integral ABS system.

Answer D is correct. The vacuum booster is not part of an integrated or integral ABS system.

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49. A vehicle has a four-wheel disc brake system. The left front inner brake pad has excessive wear. However, the outside pad shows only minor wear. Which of the following has caused this condition?

  • A. A faulty proportioning valve.
  • B. A sticking metering valve.
  • C. Sticking brake caliper guide pins.
  • D. Misaligned brake pads.

49.

Answer A is wrong. The proportioning valve controls brake pressure to the rear brakes to prevent wheel lockup.

Answer B is wrong. The metering valve prevents nosedive and helps provide for balanced braking.

Answer C is correct. Sticking or seized slides, guide pins, and caliper pistons result in a pull while braking, brake drag, overheated and warped rotors, and uneven brake pad wear.

Answer D is wrong. Misalignment can affect either pad, resulting in noise, poor performance, and tapered or angled wear.

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50. There is a growling sound coming from the front of a vehicle that increases with vehicle speed. The noise is loudest during left hand turns. Which of the following is MOST likely causing this condition?

  • A. A faulty LF wheel bearing.
  • B. A faulty RF wheel bearing.
  • C. A faulty LF CV axle.
  • D. A faulty RF CV axle.

50.

Answer A is wrong. A faulty left front wheel bearing is loudest while making a right-hand turn.

Answer B is correct. A faulty right front wheel bearing makes a whining or growling sound while traveling forward but is typically loudest while making a left-hand turn.

Answer C is wrong. A faulty CV axle makes a clicking sound while turning.

Answer D is wrong. The CV joints unique ball bearing design allows the axle to apply torque to the wheel at an angle, like while cornering.

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