Exam Questions And Correct Answers

ASE A5 Brakes Certification Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• A vehicle pulls to the right during braking. What is the most likely

cause?

• Worn brake pads on the left
• Low brake fluid
• Worn or seized caliper on the right
• Worn master cylinder

Rationale: A seized caliper or dragging brake on the right side will create

uneven braking, causing the vehicle to pull toward that side.

• Which brake fluid type is compatible with DOT 4 systems?

A) DOT 3

B) DOT 5

C) DOT 4

D) DOT 5.1 1 / 4

Rationale: DOT 4 fluid is fully compatible with DOT 3 systems, but DOT 5 is

silicone-based and not compatible.

• ABS warning light stays on after engine start. What is the most likely

cause?

• Low brake fluid
• Faulty wheel speed sensor
• Worn brake pads
• Air in brake lines

Rationale: A faulty wheel speed sensor prevents the ABS module from

monitoring wheel speed, keeping the light on.

• What is the main purpose of a proportioning valve?
• Increase pedal effort
• Prevent wheel lockup
• Reduce rear brake pressure
• Adjust master cylinder output

Rationale: A proportioning valve reduces pressure to the rear brakes to

prevent lockup during heavy braking.

• Which symptom indicates a warped brake rotor?
• Low brake fluid
• Brake pedal pulsation
• Soft pedal
• Squeaking noise 2 / 4

Rationale: A warped rotor causes uneven contact with pads, creating

pulsation felt in the pedal.

• What is the minimum allowable brake pad thickness for most

vehicles?

• 1/32 inch
• 2/32 inch
• 3/32 inch
• 4/32 inch

Rationale: Most manufacturers recommend replacing pads at 2/32 inch

thickness for safe braking performance.

• After brake service, the pedal feels soft and goes to the floor. What

should be done first?

• Replace pads
• Bleed the brake system
• Check ABS module
• Replace brake lines

Rationale: Air trapped in the brake lines can cause a soft pedal; bleeding

removes the air.

• Which condition requires resurfacing a rotor?
• Minor pad wear
• Low brake fluid 3 / 4

• Scoring or uneven thickness
• Worn master cylinder

Rationale: Resurfacing corrects rotor surface irregularities and restores

smooth braking.

• What is the purpose of a brake hose?
• Increase pedal force
• Store fluid
• Flexibly transfer brake fluid to the caliper or wheel cylinder
• Reduce pedal travel

Rationale: Brake hoses allow movement between the chassis and

suspension while transmitting hydraulic pressure.

• Which tool is used to measure rotor thickness variation?
• Torque wrench
• Dial indicator
• Micrometer or dial caliper
• Feeler gauge

Rationale: Micrometers and dial calipers measure rotor thickness

accurately to check for wear and runout.

• A vehicle exhibits a soft brake pedal and a hissing sound when

pressed. Likely cause?

• Worn pads
• Brake booster vacuum leak
• / 4