ASE A5 Brakes Practice Test

16. After replacing the front brake calipers on a vehicle with a four-wheel disc brake system, the vehicle returns with brake drag. Which of the following is causing this condition?

  • A. Glazed brake shoes.
  • B. Brake shoe adjustment.
  • C. Glazed brake pads.
  • D. A twisted brake hose.

16.

Answer A is wrong. The vehicle has a four-wheel disc brake system; brake shoes are installed in drum brakes. Glazed brake shoes result from the excessive heat caused by a dragging brake unit. Glazing is more of a problem with the shoes because brake pads are better ventilated.

Answer B is wrong. The vehicle has a four-wheel disc brake system; adjust the brake shoes on drum brake systems.

Answer C is wrong. Glazed brake pads result from the excessive heat caused by a dragging brake unit. Glazed shoes or pads cause brake fade, resulting in friction loss and reduced braking performance.

Answer D is correct. A kinked brake line or twisted brake hose results in brake drag. Never let a brake caliper hang on the flexible brake hose, and be careful not to twist the hose when reinstalling the caliper.

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17. A lateral runout test is performed on all four rotors. Which of the following is correct about this test?

  • A. This test checks for rotor thickness.
  • B. This test checks for rotor parallelism.
  • C. Use a dial indicator.
  • D. Use an outside micrometer.

17.

Answer A is wrong. Measure a rotor for parallelism or different thicknesses around the rotor's surface with an outside micrometer.

Answer B is wrong. Check for parallelism at four to eight spots around the rotor to find the thinnest spot.

Answer C is correct. Use a dial indicator to check a rotor for lateral runout or side-to-side movement. View an illustration explaining lateral runout by clicking the Read more... button.

Answer D is wrong. Parallelism is diagnosed by measuring several spots on the surface of the rotor with an outside micrometer.

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18.

Digital Micrometer

The reading on the metric micrometer above indicates:

  • A. 13.0 mm
  • B. 13.5 mm
  • C. 14.0 mm
  • D. 14.5 mm

18.

Digital Micrometer

Answer A is wrong. The answer is 14.5 mm. Metric micrometers are similar to standard micrometers.

Answer B is wrong. Whole number increments are on one side of the sleeve, and half-millimeter increments are on the other.

Answer C is wrong. The thimble of the micrometer has 50 increments of .01 millimeters.

Answer D is correct. The answer is 14.5 mm. It is important to remember that increments are on both sides of the sleeve.

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19. Which brake line is best suited for automotive brake line replacement?

  • A. Double-walled steel tubing.
  • B. Double-walled tin tubing.
  • C. Single-walled seamless copper.
  • D. Single-walled welded copper.

19.

Answer A is correct. Automakers typically use double-walled steel tubing as their standard OEM brake line.

Answer B is wrong. Brake lines are replaced with OEM, aftermarket galvanized steel, or fabricated metal tubing and fittings.

Answer C is wrong. They use double-walled steel tubing with either ISO or double-flared ends.

Answer D is wrong. Some fabricators use more flexible nickel-copper alloy, never 100% copper tubing found in hardware stores.

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20. Technician A says a three-function combination valve contains the proportioning valve. Technician B says a three-function combination valve contains the metering valve. Who is correct?

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

20.

Combination valve.

Answer A is wrong. The proportioning valve is part of the combination valve.

Answer B is wrong. The metering valve is part of the combination valve.

Answer C is correct. Both technicians are correct.

Answer D is wrong. The brake failure light switch is also part of the combination valve.

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