SOS BRAKE & BRAKING SYSTEM (LATEST
2026/2027) | QUESTIONS AND ANSWERS |
100% CORRECT | GRADE A
SOS BRAKE & BRAKING SYSTEM
1. In a single anchor Bendix drum type rear brake, which statement
is correct?
A. The primary lining is longer than the secondary
B. Both linings are equal length
C. The secondary lining is longer than the primary
D. The primary lining is mounted toward the rear
Correct Answer: C. The secondary lining is longer than the primary
Rationale:
In a single anchor Bendix (self-energizing) drum brake, the secondary shoe performs
more braking action due to the servo effect. Because it handles greater braking force,
it has a longer lining to dissipate heat and provide more friction surface. The primary
shoe is shorter and positioned toward the front of the vehicle.
2. Compared to the secondary shoe lining area of drum brakes, the
primary shoe lining area is:
A. Larger and toward the rear
B. Smaller and toward the front
C. Equal size and centered
D. Larger and toward the front
Correct Answer: B. Smaller and toward the front
Rationale:
The primary shoe is mounted toward the front of the vehicle and has a shorter lining.
It initiates braking and transfers force to the secondary shoe. The secondary shoe
provides most of the stopping power, which is why it has a larger lining area.
,3. During a brake overhaul, the brake fluid appears dark and dirty.
What should be done?
A. Reuse the fluid
B. Top off with new fluid
C. Flush the system before installing new parts
D. Ignore if braking feels normal
Correct Answer: C. Flush the system before installing new parts
Rationale:
Dark brake fluid indicates contamination and moisture absorption. Contaminated fluid
can corrode internal components and reduce braking efficiency. Flushing ensures
clean fluid circulates through the new components, preventing premature failure.
4. What symptom could be caused by over-torqued lug nuts?
A. Hard brake pedal
B. Brake fluid leak
C. Brake pedal pulsation during braking
D. Low brake pedal
Correct Answer: C. Brake pedal pulsation during braking
Rationale:
Over-torqued lug nuts can distort the brake rotor, causing thickness variation. This
distortion results in pedal pulsation when braking. Proper torque specifications must
always be followed to prevent rotor warping.
5. What is the proper brake bleeding sequence on most rear-wheel-
drive vehicles?
A. LR, RR, LF, RF
B. RF, LF, RR, LR
C. RR, LR, RF, LF
D. LF, RF, LR, RR
Correct Answer: C. RR, LR, RF, LF
Rationale:
Bleeding begins at the wheel farthest from the master cylinder. On most rear-wheel-
drive vehicles, this is the right rear. This sequence ensures all air is effectively
removed from the longest hydraulic circuits first.
, 6. The square-cut seal in a disc brake caliper is located:
A. Around the bleeder screw
B. In the caliper piston bore
C. On the rotor
D. Behind the brake pads
Correct Answer: B. In the caliper piston bore
Rationale:
The square-cut seal sits inside the piston bore and provides hydraulic sealing. It also
slightly retracts the piston when pressure is released. This self-adjusting feature
maintains proper pad clearance.
7. What is used to remove pistons from a caliper during overhaul?
A. Hammer
B. Pry bar
C. Compressed air
D. Screwdriver
Correct Answer: C. Compressed air
Rationale:
Compressed air is safely applied through the brake hose port to force the piston
outward. This prevents scoring or damage that may occur with prying tools. Safety
precautions must be followed due to piston force.
8. What keeps sliding caliper disc brake pads properly adjusted?
A. Return springs
B. Wheel bearings
C. Square-cut piston seal
D. Proportioning valve
Correct Answer: C. Square-cut piston seal
Rationale:
The elasticity of the square-cut seal retracts the piston slightly when pressure is
released. This maintains minimal clearance between pads and rotor. It eliminates the
need for manual adjustment.
2026/2027) | QUESTIONS AND ANSWERS |
100% CORRECT | GRADE A
SOS BRAKE & BRAKING SYSTEM
1. In a single anchor Bendix drum type rear brake, which statement
is correct?
A. The primary lining is longer than the secondary
B. Both linings are equal length
C. The secondary lining is longer than the primary
D. The primary lining is mounted toward the rear
Correct Answer: C. The secondary lining is longer than the primary
Rationale:
In a single anchor Bendix (self-energizing) drum brake, the secondary shoe performs
more braking action due to the servo effect. Because it handles greater braking force,
it has a longer lining to dissipate heat and provide more friction surface. The primary
shoe is shorter and positioned toward the front of the vehicle.
2. Compared to the secondary shoe lining area of drum brakes, the
primary shoe lining area is:
A. Larger and toward the rear
B. Smaller and toward the front
C. Equal size and centered
D. Larger and toward the front
Correct Answer: B. Smaller and toward the front
Rationale:
The primary shoe is mounted toward the front of the vehicle and has a shorter lining.
It initiates braking and transfers force to the secondary shoe. The secondary shoe
provides most of the stopping power, which is why it has a larger lining area.
,3. During a brake overhaul, the brake fluid appears dark and dirty.
What should be done?
A. Reuse the fluid
B. Top off with new fluid
C. Flush the system before installing new parts
D. Ignore if braking feels normal
Correct Answer: C. Flush the system before installing new parts
Rationale:
Dark brake fluid indicates contamination and moisture absorption. Contaminated fluid
can corrode internal components and reduce braking efficiency. Flushing ensures
clean fluid circulates through the new components, preventing premature failure.
4. What symptom could be caused by over-torqued lug nuts?
A. Hard brake pedal
B. Brake fluid leak
C. Brake pedal pulsation during braking
D. Low brake pedal
Correct Answer: C. Brake pedal pulsation during braking
Rationale:
Over-torqued lug nuts can distort the brake rotor, causing thickness variation. This
distortion results in pedal pulsation when braking. Proper torque specifications must
always be followed to prevent rotor warping.
5. What is the proper brake bleeding sequence on most rear-wheel-
drive vehicles?
A. LR, RR, LF, RF
B. RF, LF, RR, LR
C. RR, LR, RF, LF
D. LF, RF, LR, RR
Correct Answer: C. RR, LR, RF, LF
Rationale:
Bleeding begins at the wheel farthest from the master cylinder. On most rear-wheel-
drive vehicles, this is the right rear. This sequence ensures all air is effectively
removed from the longest hydraulic circuits first.
, 6. The square-cut seal in a disc brake caliper is located:
A. Around the bleeder screw
B. In the caliper piston bore
C. On the rotor
D. Behind the brake pads
Correct Answer: B. In the caliper piston bore
Rationale:
The square-cut seal sits inside the piston bore and provides hydraulic sealing. It also
slightly retracts the piston when pressure is released. This self-adjusting feature
maintains proper pad clearance.
7. What is used to remove pistons from a caliper during overhaul?
A. Hammer
B. Pry bar
C. Compressed air
D. Screwdriver
Correct Answer: C. Compressed air
Rationale:
Compressed air is safely applied through the brake hose port to force the piston
outward. This prevents scoring or damage that may occur with prying tools. Safety
precautions must be followed due to piston force.
8. What keeps sliding caliper disc brake pads properly adjusted?
A. Return springs
B. Wheel bearings
C. Square-cut piston seal
D. Proportioning valve
Correct Answer: C. Square-cut piston seal
Rationale:
The elasticity of the square-cut seal retracts the piston slightly when pressure is
released. This maintains minimal clearance between pads and rotor. It eliminates the
need for manual adjustment.
