ASE A5 Brakes Practice Test

1. A front wheel drive vehicle with four wheel disc brakes is pulling to the left. Technician A says an external kink or internal restriction in the LF brake line will result in this condition. Technician B says to use a compression fitting to repair a section of brake line. Who is correct?

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

1.

Answer A is correct. When a restriction forms in a brake line, the master cylinder creates more than enough pressure to bypass the kink and apply the brake. The problem is the brake caliper or wheel cylinder is unable to create enough pressure to bypass the kink and return the fluid to the master cylinder. This keeps the brake applied at that wheel resulting in brake drag.

Answer B is wrong. Always use brake line that’s approved by the vehicle’s manufacturer (steel line), not copper or a compression fitting

Answer C is wrong. Technician A is correct.

Answer D is wrong. Technician A is correct.

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2. The brake pad wear indicator light is illuminated on the instrument panel. Technician A says this is because the brake pads have become contaminated. Technician B says this is the pad wear sensor contacting the brake rotor. Who is correct?

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

2.

Answer A is wrong. This is usually caused by the sensors tip touching the rotor. If the brake pads have become contaminated the pads must be replaced.

Answer B is correct. When the sensors tip contacts the rotor, the pad warning light illuminates on the instrument panel.

Answer C is wrong. Technician B is correct.

Answer D is wrong. Technician B is correct.

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3. A vehicle's right front wheel has a growl that increases with vehicle speed. The MOST likely cause is:

  • A. Excessive rotor lateral run out.
  • B. Warped rear brake drums.
  • C. A worn CV-Joint.
  • D. A worn wheel bearing.

3.

Answer A is wrong. Excessive lateral rotor run-out will result in a pulsating feeling in the brake pedal (front) or the drivers seat (rear).

Answer B is wrong. A warped brake drum is similar to a warped rotor and will result in a pulsating feeling in the brake pedal (front) or the drivers seat (rear).

Answer C is wrong. A worn CV- Joint will produce a clacking noise while cornering.

Answer D is correct. A worn wheel bearing will cause a growl that increases with vehicle speed.

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4. The amber ABS fault light is illuminated on a vehicle's instrument panel. The vehicle contains a four channel permanent magnet sensor ABS brake system. All of these are true EXCEPT.

  • A. Oversized tires will have an adverse effect on this ABS system.
  • B. The gap between the sensor and the tone ring is critical with PM sensor operation.
  • C. Permanent magnet sensor systems function well at speeds below 5 mph.
  • D. Permanent magnet sensors and companion tone rings produce a AC frequency converted to DC pulses by the ABS controller.

4.

Answer A is wrong. Oversize tires slow the signal frequency of the wheel speed sensors.

Answer B is wrong. The gap between the sensor and the tone ring is critical. To close will damage the sensor/ring and too far will weaken the signal to the controller.

Answer C is correct. A These systems typically remain passive at lower speeds. ABS systems remain passive and are activated when a possible skid is detected, this is not likely at 5mph.

Answer D is wrong. PM sensors produce an AC signal that is converted to DC by the control module.

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5. A master cylinder reservoir cap’s rubber gasket is deformed. Which of the following would result in this condition?

  • A. Adding too much brake fluid.
  • B. Adding too little brake fluid.
  • C. Brake fluid contamination.
  • D. Allowing the brake fluid to get too low.

5.

Answer A is wrong. Adding too much fluid will not result in a deformed gasket.

Answer B is wrong. Adding too little fluid will not result in a deformed gasket.

Answer C is correct. Brake fluid contamination, especially petroleum products, will cause gasket deformation.

Answer D is wrong. Answer C is correct.

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