Deck 15: Disc Brake System Inspection and Service

Question 1

Technician A says pedal reserve is the measurement from the floorboard to the brake pedal when applied.Technician B says pedal travel is typically about 1 ½ to 2 inches and reserve is often about 2 ½ to 3 ½ inches.Who is correct?

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

Answer 1

A

Question 2

When servicing integral rear calipers, ___________ the piston requires threading the piston back into its bore.

Answer 2

retracting

Question 3

The floating caliper pins should be lubricated with chassis grease before installation.

Answer 3

False

Question 4

Rotors must be measured any time disc brake service is performed.

Question 5

Technician A says rotors do not rust on the inside vents.Technician B says that rotors can completely rust away from the inside.Who is correct?

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

Question 6

Technician A says rotors that are smaller than machine-to or below the discard limit must be replaced.Technician B says rotors above machine-to may be able to be placed back in service depending on their parallelism, runout, and surface condition.Who is correct?

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

Question 7

Measuring rotor parallelism requires a micrometer that can measure at least ______ inch.

A)0.05
B)0.0005
C)0.005
D)0.00005

Question 8

To inspect the inside of the rotor vents, a _________ __________ is typically used.

Question 9

Disc brake rotor conditions are being discussed.Technician A resurfaces the rotor if it has lateral runout, lacks parallelism, or is scored.Technician B resurfaces both the left and right rotors even if only one rotor has problems.Who is correct?

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

Question 10

Rotors must be carefully __________ and ___________ to determine if they are fit to remain in service.

Question 11

The tool shown in the illustration is used to:

A)extend the rear caliper piston.
B)retract the front caliper piston.
C)retract the rear caliper piston.
D)extend the front caliper piston.

Question 12

Variations in rotor thickness result in brake pedal __________ as the pads move in and out and compensate for the rotor.

Question 13

Vibration when braking can be caused by excessive hub runout.

Question 14

Pad lining ___________ can often be checked with the caliper in place,

Question 15

Technician A says the following illustrated procedure is a method of seating new pads.Technician B says the following illustrated procedure is a method of retracting the caliper piston.Who is correct?

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

Question 16

Which of the following attaches to the vehicle in order to machine the rotor?

A)on-car lathe
B)dial indicator
C)wear indicator
D)disc brake micrometer

Question 17

Lateral runout is the side-to-side movement of the rotor and it can be caused by a warped rotor a bent or damaged hub flange, or loose wheel bearings .

Question 18

All of the following statements are true EXCEPT:

A)Pad lining thickness should never be checked with the caliper in place.
B)The thinner the pad lining is, the more rapid the wear will take place.
C)Uneven wear indicates that the pads are not sliding properly.
D)Uneven inner and outer pad wear can indicate a problem with the caliper piston not retracting or the caliper itself not releasing.

Question 19

Technician A says grabbing brakes may be caused by worn rotors or pads.Technician B says pedal pulsation when the brakes are applied is caused by grease or brake fluid contamination of the pads.Who is correct?

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

Question 20

Rotor thickness is measured with a dial indicator.