CHAPTER 100 DRUM BRAKE DIAGNOSIS AND SERVICE

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CHAPTER 100 DRUM BRAKE DIAGNOSIS AND SERVICE

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -27 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Tech A says that the access hole for the star wheel adjuster may be in the brake drum web. Tech B says that the access hole for the star wheel may be found in the backing plate. Which Tech is correct?

Answer:

Both

Question 2: Dry backing plate pads can cause the brakes to squeak.

Answer:

True

Question 3: When brake linings are replaced, the ---- should be inspected.

Answer:

Condition of the wheel cylinders

Question 4: Today, most wheel cylinders are rebuilt, rather than replaced.

Answer:

False

Question 5: The first step in brake drum removal is to:

Answer:

Mark the drum R or L Question 6: A star wheel adjuster is installed on the wrong side of the vehicle. Tech A says that the adjuster cannot operate at all if installed on the wrong side. Tech B says that the adjuster would cause the clearance to increase rather than decrease when activated. Which Tech is correct?

Answer:

Tech B Question 7: After assembling a drum brake, it is discovered that the brake drum will not fit over the new brake shoes. Tech A says that the parking brake cable may not have been fully released. Tech B says to check to see if both shoes are contacting the anchor pin. Which Tech is correct?

Answer:

Both

Question 8: Fixed drums are held on by a large spindle nut.

Answer:

True Question 9: Tech A says that bolts are used to attach the wheel cylinder to the backing plate.Tech B says that clips are used to attach the wheel cylinder to the backing plate. Which Tech is correct?

Answer:

Both Question 10: Tech A says that wheel cylinder dust boots keep dust and moisture out of the cylinder bore. Tech B says that it is normal for dust boots to allow a little seepage of fluid.Which Tech is correct?

Answer:

Both

Question 11: Tech A says that when repairing brakes, it is a good practice to inspect the backing plate for a bent or cracked structure. Tech B says that the pads of the backing plate should be lubricated with heavy grease before installing new shoes. Which Tech is correct?

Answer:

Tech A Question 12: Tech A says to use masking tape temporarily over the lining material to help prevent getting grease on the lining. Tech B says that grease on the brake lining can cause the brakes to grab. Which Tech is correct?

Answer:

Both Question 13: The backing plate should be replaced if the shoe contact areas (pads or ledges) are worn more than

Answer:

1/16 in. (2 mm)

Question 14: A frozen adjuster can cause a low brake pedal.

Answer:

True Question 15: Tech A says that most experts recommend replacing all drum brake hardware including the springs every time the brake linings are replaced. Tech B says that the star wheel adjuster must be cleaned and lubricated to assure proper operation. Which Tech is correct?

Answer:

Both Question 16: Most brake experts and vehicle manufacturers recommend replacing brake lining when the lining thickness is

Answer:

.060 in. (1.5 mm) Question 17: Wheel cylinders are being discussed. Tech A says that if a wheel cylinder is not leaking fluid it is OK. Tech B says that wheel cylinders require further inspection. Which Tech is correct?

Answer:

Tech B

Question 18: Tech A says that the tinnerman nuts used to hold the brake drum on should be reinstalled when the drum is replaced. Tech B says that a drum should be removed inside a sealed vacuum enclosure or washed with water or solvent to prevent possible asbestos dust from being released into the air. Which Tech is correct?

Answer:

Tech B Question 19: Tech A says that brake drums should be labeled "left" and "right" before being removed from the vehicle so that they can be reinstalled to the same location. Tech B says that the hold down pins may have to be cut off to remove a worn brake drum. Which Tech is correct?

Answer:

Both Question 20: Tech A says to use synthetic grease to lubricate the backing plate. Tech B says to use special lithium-based brake grease. Which Tech is correct?

Answer:

Both Question 21: Tech A says that silicone grease can be used to lubricate the shoe contact ledges.Tech B says that synthetic brake grease, lithium brake grease, or anti-seize compound can be used as a brake lubricant. Which Tech is correct?

Answer:

Both Question 22: Most manufacturers recommend that brake parts should be cleaned with

Answer:

Denatured Alcohol Question 23: Tech A says that many vehicle manufacturers recommend that wheel cylinders not be hones because of the special finish inside the bore. Tech B says that some experts recommend that the wheel cylinders be replaced every time the brake linings are replaced.Which Tech is correct?

Answer:

Both