Deck 58: Brake Service

Question 1

While having a discussion, Technician A says that runout can be a result of hub distortion caused when lug nuts are tightened with an impact wrench. Technician B says that it can be caused by dirt or rust on the mating surfaces of the rotor and hub. Who is correct?

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

Answer 1

C

Question 2

All of the following statements are true EXCEPT:

A)if a spring is dropped on a hard surface, it must ring or bounce.
B)when reinstalling brake shoes on the backing plates, it is sometimes easier to assemble the springs to the brake linings first.
C)shoe return springs should not be loose or broken.
D)after the brake shoes have been installed on the backing plates, an initial clearance adjustment is made before installing the brake drums.

Answer 2

A

Question 3

A low pedal is typically due to air in the hydraulic system, and a soft pedal can be related to a failure in one side of the master cylinder's hydraulic system or drum brakes in need of an adjustment.

Answer 3

False

Question 4

____________________ results when hydraulic pistons are moving in and out during a stop.

Question 5

Which of the following statements is LEAST-Likely true?

A)When reassembling some large-bore, single-piston calipers, it is helpful to apply short bursts of air into the caliper's fluid inlet to help square up the piston and inflate the dust boot while working the piston down into the bore.
B)After a caliper has been disassembled, a new seal must be used.
C)Most fixed calipers use interchangeable inner and outer pads that can usually be slid in from the top after caliper installation.
D)Due to weight transfer, rear linings are expected to wear out about twice as often as front linings.

Question 6

Before turning drums or rotors, all rust must be removed from mounting surfaces to eliminate ____________________.

Question 7

Extra braking effort can be required when a power booster is not operating properly or when the wrong linings have been installed.

Question 8

If the size of the wheel cylinder is increased during honing by less than 0.005", the cylinder must be replaced.

Question 9

Vibration can cause a very rough cut when turning parts on a lathe. To prevent this, a(n) ____________________ is used to dampen vibration during machining.

Question 10

____________________ means that the brakes stay on after a stop.

Question 11

Which of the following statements is LEAST-Likely true?

A)Brake linings are made of asbestos or an asbestos substitute.
B)Brake dust is dangerous to breathe.
C)High-pressure wet brake washers are the most popular way of cleaning brake assemblies.
D)A HEPA vacuum can be used to safely remove asbestos dust from brakes.

Question 12

The tool that would MOST-Likely be used to apply a nondirectional finish to the face of a finished rotor is:

A)a rotating sander
B)a blowgun
C)a caliper
D)pliers

Question 13

When reassembling brake hydraulic parts, use ____________________ liberally as an assembly lubricant.

Question 14

All of the following statements are true EXCEPT:

A)one of the reasons that glycol is the material of choice for brake fluids is that it absorbs water so that it will not be able to cause problems in the hydraulic system.
B)in humid climates, brake fluid can absorb an average of 3% of its volume in water during 18 months.
C)during average driving, brake linings sometimes wear out fast enough for brake fluid to remain in good condition between brake jobs.
D)DOT 3 fluid has a minimum dry boiling point of 201°F.

Question 15

Anodized aluminum cylinders, found on many late-model cars, should not be honed because their hard surface layer will be removed and they will corrode.

Question 16

Air or moisture in the hydraulic system can result in a soft, "spongy" pedal.

Question 17

____ sometimes appear in the surface of a drum or rotor when there has been excessive heat.

A)Swaged lugs
B)Hard spots
C)Guide pins
D)Carbide

Question 18

While having a discussion, Technician A says that to tell the difference between a brake fluid leak and gear oil from an axle leak, try washing the fluid off with water. Technician B says that neither brake fluid nor gear oil is water soluble so the use of water would prove nothing. Who is correct?

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

Question 19

The kit that MOST-Likely contains a new boot, a piston seal, and sometimes rubber O-rings for the sliding caliper bolts is a(n):

A)crankshaft kit
B)caliper rubber parts kit
C)master kit
D)overhaul kit

Question 20

A ____ cuts a thread in the surface of the rotor.

A)rotating sander
B)caliper
C)brake spoon
D)brake lathe

Question 21

How would you test the operation of a power break booster?

Question 22

What are the reasons for brake pull?

Question 23

A defective power booster can sometimes cause brakes to drag, resulting in rapid brake lining wear. How would you verify this?

Question 24

How do you avoid cross-threading when reinstalling flared lines?

Question 25

How would you perform a manual brake bleeding?