ASE T4 Brakes Exam Questions And
Correct Answers With Rationales
1. A vehicle pulls to the right during braking. The most likely cause is
A. Worn brake pads on the left front
B. Air in the right brake line
C. Sticking caliper on the left front
D. Low brake fluid in the master cylinder
This occurs because air in one brake line can reduce braking force
on that wheel, causing the vehicle to pull toward it.
2. Which component is designed to prevent brake fluid from leaking
past the caliper piston?
A. Brake pad
B. Caliper piston seal
C. Wheel cylinder
D. Master cylinder reservoir
The caliper piston seal keeps fluid contained and allows piston
movement without leaks.
3. ABS warning lights on indicate:
A. The brake fluid is low
B. A malfunction in the ABS system
C. Brake pads are worn
, D. Master cylinder failure
ABS warning lights signal a problem in the anti-lock system, which
may not affect normal braking but disables ABS functionality.
4. Which type of brake fluid should be used if the manufacturer
specifies DOT 3?
A. DOT 4
B. DOT 3
C. DOT 5 silicone
D. Any fluid with a high boiling point
Brake systems must use the fluid type specified by the
manufacturer to ensure proper operation and compatibility.
5. What is the primary purpose of a brake proportioning valve?
A. Reduce brake pedal travel
B. Increase hydraulic pressure
C. Limit rear brake pressure
D. Actuate the ABS system
The proportioning valve reduces rear brake pressure to prevent
wheel lockup during hard braking.
6. Which condition would cause a soft brake pedal?
A. Stuck caliper
B. Air in the brake lines
C. Overfilled brake fluid
D. Worn brake pads
Air in the hydraulic system compresses under pedal pressure,
creating a soft pedal feel.
7. When inspecting drum brakes, the brake shoes should be checked
for:
, A. Thickness and contamination
B. Only cracks
C. Only glaze
D. Color of the paint
Brake shoes must have adequate thickness and be free of oil,
grease, or brake fluid to function properly.
8. A vehicle has pulsation in the brake pedal during braking. The
most likely cause is:
A. Low brake fluid
B. Worn pads
C. Warped rotors
D. Stuck caliper
Warped rotors cause uneven contact with pads, producing pedal
pulsation.
9. What is the purpose of the brake booster?
A. Store brake fluid
B. Actuate the ABS
C. Increase pedal force
D. Reduce caliper wear
The brake booster uses vacuum or hydraulic pressure to multiply
the driver’s force on the pedal.
10. Which brake type uses shoes and a drum?
A. Disc
B. Drum
C. Caliper
D. Rotor
Correct Answers With Rationales
1. A vehicle pulls to the right during braking. The most likely cause is
A. Worn brake pads on the left front
B. Air in the right brake line
C. Sticking caliper on the left front
D. Low brake fluid in the master cylinder
This occurs because air in one brake line can reduce braking force
on that wheel, causing the vehicle to pull toward it.
2. Which component is designed to prevent brake fluid from leaking
past the caliper piston?
A. Brake pad
B. Caliper piston seal
C. Wheel cylinder
D. Master cylinder reservoir
The caliper piston seal keeps fluid contained and allows piston
movement without leaks.
3. ABS warning lights on indicate:
A. The brake fluid is low
B. A malfunction in the ABS system
C. Brake pads are worn
, D. Master cylinder failure
ABS warning lights signal a problem in the anti-lock system, which
may not affect normal braking but disables ABS functionality.
4. Which type of brake fluid should be used if the manufacturer
specifies DOT 3?
A. DOT 4
B. DOT 3
C. DOT 5 silicone
D. Any fluid with a high boiling point
Brake systems must use the fluid type specified by the
manufacturer to ensure proper operation and compatibility.
5. What is the primary purpose of a brake proportioning valve?
A. Reduce brake pedal travel
B. Increase hydraulic pressure
C. Limit rear brake pressure
D. Actuate the ABS system
The proportioning valve reduces rear brake pressure to prevent
wheel lockup during hard braking.
6. Which condition would cause a soft brake pedal?
A. Stuck caliper
B. Air in the brake lines
C. Overfilled brake fluid
D. Worn brake pads
Air in the hydraulic system compresses under pedal pressure,
creating a soft pedal feel.
7. When inspecting drum brakes, the brake shoes should be checked
for:
, A. Thickness and contamination
B. Only cracks
C. Only glaze
D. Color of the paint
Brake shoes must have adequate thickness and be free of oil,
grease, or brake fluid to function properly.
8. A vehicle has pulsation in the brake pedal during braking. The
most likely cause is:
A. Low brake fluid
B. Worn pads
C. Warped rotors
D. Stuck caliper
Warped rotors cause uneven contact with pads, producing pedal
pulsation.
9. What is the purpose of the brake booster?
A. Store brake fluid
B. Actuate the ABS
C. Increase pedal force
D. Reduce caliper wear
The brake booster uses vacuum or hydraulic pressure to multiply
the driver’s force on the pedal.
10. Which brake type uses shoes and a drum?
A. Disc
B. Drum
C. Caliper
D. Rotor
