Deck 13: Drum Brake System Inspection and Service

Question 1

Which of the following is used to check for out-of-round?

A)vacuum enclosure
B)holddown spring tool
C)return spring tool
D)drum brake micrometer

Answer 1

C

Question 2

The three most common arrangements of nonfloating drum arraignments are the _____________ bearing, __________ wheel bearing, and __________ _________ rear axle types.

Answer 2

sealed; tapered, full-floating

Question 3

A leaking wheel cylinder must be either rebuilt or replaced

Answer 3

True

Question 4

What tool is used to measure the drum diameter and then transfer that dimension to the shoes?

A)drum micrometer
B)dial indicator
C)dial caliper
D)clearance gauge

Question 5

What tool is used to measure the wear of the drum's friction surface?

A)drum micrometer
B)dial indicator
C)dial caliper
D)clearance gauge

Question 6

Grabbing brakes are usually caused by:

A)glazed or worn linings.
B)grease on linings.
C)fluid contaminating the linings.
D)all of the above.

Question 7

An air gun may be used to remove brake dust before servicing the brakes.

Question 8

Technician A says hard spots in the drum are caused by overheating the brakes..Technician B says hard spot formation requires drum replacement..Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 9

The dial-indicator part of the metric drum micrometer is used to fine-tune the diameter, down to ________ mm.

Question 10

Technician A says the scratch cuts in the illustration below indicate the drum is not properly mounted on the lathe shaft.Technician B says the scratch cuts indicate that the drum is out of round.Who is correct?

A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question 11

Technician A says a possible cause of a brake warning light turned on is worn shoe linings.Technician B says a possible cause of a brake warning light turned on is low fluid level in the master cylinder.Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 12

Hard spots in the drum care caused by over-heating the brakes.

Question 13

Which of the following will cause pulsation in the brake pedal when the brakes are applied?

A)loose lining
B)grease on linings
C)out-of-round drum
D)All of the above

Question 14

Before brake reassembly, you should apply a very light amount of brake lubricant to the raised pads on the backing plate .

Question 15

Drum brake pulsation occurs if the drum becomes out-of-round.

Question 16

A vacuum enclosure or __________ is used to clean brake dust from the brake assembly.

A)holddown spring tool
B)return spring tool
C)drum brake micrometer
D)wet sink

Question 17

A leak in the hydraulic system usually causes a _______ or ____________ brake pedal.

Question 18

Technician A says cracks in the drum facing, such as around lug holes can occur from extreme stress or from a collision.Technician B says cracking in the friction surface is a result of overheating and extreme stress when braking.Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 19

On some vehicles, you may have to remove one or two _________ that hold the ________ tight to the hub.

Question 20

Uneven wear across the brake shoe can indicate a bent __________ __________ or a problem with the drum.