SOS Brake & Braking System 2025/2026 |
Complete Study Guide & Notes
In a single anchor bendix drum type rear brake - correct answerthe secondary lining is
longer than the primary
Compared to the secondary shoe lining areas of drum brakes, the primary shoe lining
area is: - correct answersmaller and goes toward the front of the car
During a brake overhaul, you notice that the brake fluid seems to be very dirty and dark
in color. What should you do? - correct answerflush the system before the new parts are
installed
In order to bleed the system on a vehicle equipped with power brakes: - correct
answerNone of the above
Which of the following could be a symptom of over-torqued lug nuts? - correct answerA
brake pedal pulsation during braking.
Which of the following describes the proper sequence to bleed brake lines on most rear
wheel drive vehicles: - correct answerRR, LR, RF, LF
In disc brake caliper assemblies, the "square cut seal" is usually located: - correct
answerIn the caliper piston bore
When performing a caliper overhaul, what would you use to remove the pistons from the
calipers? - correct answerCompressed air
Sliding caliper disc brake pads are kept in adjustment by the - correct answerSquare cut
piston seal
A cracked or torn vacuum diaphragm in a power booster would likely cause: - correct
answerHard pedal with very high effort required
When the brakes are applied on a car with disc-drum brakes, a vibration or pulsating
movement is felt. What can cause this problem? - correct answerA rotor thickness
variation
While test driving a car, the mechanic finds that the right front brake "grabs". The most
likely cause of this problem is: - correct answerBrake fluid or grease on the brake
linings.
, During a road test, you find that when normal breaking pressure is applied the pedal
slowly goes to the floor. What is the likely cause of this problem? - correct answerA
leaking master cylinder primary piston seal.
A rattle is a single piston disc brake assembly which goes away when the brakes are
applied is most likely a result of: - correct answerLoose pads in the caliper
Which of the following would most likely cause dragging brakes? - correct answerA
defective vehicle load sensor
With the car standing still, you can hear a squeaking noise when applying the brake
pedal slowly. What could cause this noise? - correct answerDry backing plate contact
surfaces.
There is a scraping sound coming from one rear brake. The sound stops when the
brakes are applied. What is the likely cause of the problem? - correct answerA broken
shoe hold-down spring or pin
If a drum brake self-adjuster seizes up, the likely result will be: - correct answerA low
pedal
Which of the following can be used to check for rotor thickness variation? - correct
answerDial indicator
On a vehicle with a disc/drum brake system, the rear wheels lock up under hard
braking. The most likely cause is: - correct answerA defective proportioning valve
After putting a bearing race in a hub, you notice that the new race is loose and can spin
in the hub. What should you do? - correct answerReplace the hub
When adjusting disc-drum brakes, you should: - correct answerAdjust the rear brakes
after releasing the parking brakes
What type of rotor surface provides the best braking with new pads? - correct answerA
smooth, flat surface
Which of the following is a quick way to determine whether the master cylinder is bad?
There are no external leaks in the system. - correct answerPump up the brake pedal,
then hold it firm. If the pedal slowly drops to the floor, the master cylinder is bad.
You are rebuilding a master cylinder. What should you use to lubricate the internal
parts? - correct answerBrake fluid
Which of the following is the most likely cause of low fluid level in the master cylinder? -
correct answerWorn brake pads and linings
Complete Study Guide & Notes
In a single anchor bendix drum type rear brake - correct answerthe secondary lining is
longer than the primary
Compared to the secondary shoe lining areas of drum brakes, the primary shoe lining
area is: - correct answersmaller and goes toward the front of the car
During a brake overhaul, you notice that the brake fluid seems to be very dirty and dark
in color. What should you do? - correct answerflush the system before the new parts are
installed
In order to bleed the system on a vehicle equipped with power brakes: - correct
answerNone of the above
Which of the following could be a symptom of over-torqued lug nuts? - correct answerA
brake pedal pulsation during braking.
Which of the following describes the proper sequence to bleed brake lines on most rear
wheel drive vehicles: - correct answerRR, LR, RF, LF
In disc brake caliper assemblies, the "square cut seal" is usually located: - correct
answerIn the caliper piston bore
When performing a caliper overhaul, what would you use to remove the pistons from the
calipers? - correct answerCompressed air
Sliding caliper disc brake pads are kept in adjustment by the - correct answerSquare cut
piston seal
A cracked or torn vacuum diaphragm in a power booster would likely cause: - correct
answerHard pedal with very high effort required
When the brakes are applied on a car with disc-drum brakes, a vibration or pulsating
movement is felt. What can cause this problem? - correct answerA rotor thickness
variation
While test driving a car, the mechanic finds that the right front brake "grabs". The most
likely cause of this problem is: - correct answerBrake fluid or grease on the brake
linings.
, During a road test, you find that when normal breaking pressure is applied the pedal
slowly goes to the floor. What is the likely cause of this problem? - correct answerA
leaking master cylinder primary piston seal.
A rattle is a single piston disc brake assembly which goes away when the brakes are
applied is most likely a result of: - correct answerLoose pads in the caliper
Which of the following would most likely cause dragging brakes? - correct answerA
defective vehicle load sensor
With the car standing still, you can hear a squeaking noise when applying the brake
pedal slowly. What could cause this noise? - correct answerDry backing plate contact
surfaces.
There is a scraping sound coming from one rear brake. The sound stops when the
brakes are applied. What is the likely cause of the problem? - correct answerA broken
shoe hold-down spring or pin
If a drum brake self-adjuster seizes up, the likely result will be: - correct answerA low
pedal
Which of the following can be used to check for rotor thickness variation? - correct
answerDial indicator
On a vehicle with a disc/drum brake system, the rear wheels lock up under hard
braking. The most likely cause is: - correct answerA defective proportioning valve
After putting a bearing race in a hub, you notice that the new race is loose and can spin
in the hub. What should you do? - correct answerReplace the hub
When adjusting disc-drum brakes, you should: - correct answerAdjust the rear brakes
after releasing the parking brakes
What type of rotor surface provides the best braking with new pads? - correct answerA
smooth, flat surface
Which of the following is a quick way to determine whether the master cylinder is bad?
There are no external leaks in the system. - correct answerPump up the brake pedal,
then hold it firm. If the pedal slowly drops to the floor, the master cylinder is bad.
You are rebuilding a master cylinder. What should you use to lubricate the internal
parts? - correct answerBrake fluid
Which of the following is the most likely cause of low fluid level in the master cylinder? -
correct answerWorn brake pads and linings
