ASE A5 BRAKES STUDY GUIDE (DRUM BRAKES
DIAGNOSIS AND REPAIR) QUESTIONS WITH
CORRECT ANSWERS 2025-2026
The positions the primary and secondary shoes on an adjuster assembly CORRECT
ANSWER Front = Primary
Rear = Secondary (pg37)
Duo Servo Drum Brakes CORRECT ANSWER Has a wheel cylinder on top of the backing
plate
Braking force is transferred from shoe to the other
as the wheel rotates in ether direction
Brakes will self adjust when vehicle travels in reverse
(pg37,38)
which of the brake shoes are thicker and longer CORRECT ANSWER secondary (pg38)
Leading-Trailing Drum Brakes CORRECT ANSWER
Has both shoes held in place against a solidly attached anchor mounted to the bottom of the back
ing plate
Adjusts when a certain distance between the lining and the drum is reached
when the brakes are applied in normal vehicle motion
the forward or leading shoe is energized, while the shoe is not
(pg39,40)
The variation in self adjustment in leading trailing drum brakes CORRECT
ANSWER adjust whenever the brakes are applied or when the parking brake is
applied (pg40)
, What could be the cause of a squeaking noise when the brakes are applied CORRECT
ANSWER excessive wear to or lack of lubrication on the brake backing plate shoe support
pads (pg41)
What could be the cause of a squealing sound CORRECT
ANSWER glazed brake linings or foreign material embedded in the
lining (pg41)
What could be the cause of a grinding noise CORRECT ANSWER
metal to metal contact of the rivets or brake shoe against the brake drum if linings are worn (pg4
1)
What could be the cause of a low brake pedal CORRECT ANSWER
excessive clearance between the brake linings and drum or a leak in the hydraulic system (pg41)
What maybe the cause of excessive clearance between the linings and drums
CORRECT ANSWER
malfunctioning automatic adjuster mechanisms or the driver does not back up enough to allow the
adjuster mechanisms to keep pace with lining wear (pg41)
What could be the cause of a hard pedal CORRECT ANSWER glazed linings or grease
(pg41)
What could cause brakes to grab CORRECT ANSWER grease or brake fluid contamination
(pg41)
What can be the cause of pedal pulsation CORRECT ANSWER
drums that are out of round (pg41)
What can be the cause of dragging brakes CORRECT ANSWER
broken or weak return springs, frozen parking brake pedal, a restricted brake hose, or swelled rubb
er components due to contaminated brake fluid (pg41)
DIAGNOSIS AND REPAIR) QUESTIONS WITH
CORRECT ANSWERS 2025-2026
The positions the primary and secondary shoes on an adjuster assembly CORRECT
ANSWER Front = Primary
Rear = Secondary (pg37)
Duo Servo Drum Brakes CORRECT ANSWER Has a wheel cylinder on top of the backing
plate
Braking force is transferred from shoe to the other
as the wheel rotates in ether direction
Brakes will self adjust when vehicle travels in reverse
(pg37,38)
which of the brake shoes are thicker and longer CORRECT ANSWER secondary (pg38)
Leading-Trailing Drum Brakes CORRECT ANSWER
Has both shoes held in place against a solidly attached anchor mounted to the bottom of the back
ing plate
Adjusts when a certain distance between the lining and the drum is reached
when the brakes are applied in normal vehicle motion
the forward or leading shoe is energized, while the shoe is not
(pg39,40)
The variation in self adjustment in leading trailing drum brakes CORRECT
ANSWER adjust whenever the brakes are applied or when the parking brake is
applied (pg40)
, What could be the cause of a squeaking noise when the brakes are applied CORRECT
ANSWER excessive wear to or lack of lubrication on the brake backing plate shoe support
pads (pg41)
What could be the cause of a squealing sound CORRECT
ANSWER glazed brake linings or foreign material embedded in the
lining (pg41)
What could be the cause of a grinding noise CORRECT ANSWER
metal to metal contact of the rivets or brake shoe against the brake drum if linings are worn (pg4
1)
What could be the cause of a low brake pedal CORRECT ANSWER
excessive clearance between the brake linings and drum or a leak in the hydraulic system (pg41)
What maybe the cause of excessive clearance between the linings and drums
CORRECT ANSWER
malfunctioning automatic adjuster mechanisms or the driver does not back up enough to allow the
adjuster mechanisms to keep pace with lining wear (pg41)
What could be the cause of a hard pedal CORRECT ANSWER glazed linings or grease
(pg41)
What could cause brakes to grab CORRECT ANSWER grease or brake fluid contamination
(pg41)
What can be the cause of pedal pulsation CORRECT ANSWER
drums that are out of round (pg41)
What can be the cause of dragging brakes CORRECT ANSWER
broken or weak return springs, frozen parking brake pedal, a restricted brake hose, or swelled rubb
er components due to contaminated brake fluid (pg41)
