ASE B5 Auto Damage Prep Exam Questions & Answers 2026 (21–30)

Question 1

After replacing an ABS wheel speed sensor following front-end collision repair, the ABS warning light remains on. Technician A says to check for metal debris on the sensor. Technician B says to verify the air gap between the sensor and tone ring. Who is correct?

TheoryPractice · Accepted Answer

Both A and B. Both statements are correct. Metal debris on the sensor can interfere with its operation, and an incorrect air gap between the sensor and tone ring can prevent the sensor from properly reading wheel speed.

Question 2

When replacing brake fluid after collision repair, what type should be used if the vehicle has an electronic stability control system?

TheoryPractice · Accepted Answer

The type specified by the vehicle manufacturer. Always use the fluid type specified by the manufacturer for that particular vehicle. Electronic stability control systems may require specific brake fluid properties for optimal performance.

Question 3

During brake system inspection following a rear-end collision, a technician notices scoring on a brake rotor. The MOST appropriate action is to:

TheoryPractice · Accepted Answer

Measure the scoring depth and replace the rotor if it exceeds specifications. If scoring exceeds manufacturer's specifications, the rotor should be replaced. Machining may not leave sufficient material thickness for safe operation, particularly if scoring is deep.

Question 4

When rebuilding a brake caliper after collision damage, what should be replaced every time?

TheoryPractice · Accepted Answer

All seals and boots. Seals and boots should always be replaced when rebuilding a brake caliper to prevent fluid leaks and contaminant intrusion, which could lead to brake failure.

Question 5

After replacing a brake hose due to collision damage, the technician notices that the brake pedal feels spongy. The MOST likely cause is:

TheoryPractice · Accepted Answer

Air in the hydraulic system. Air trapped in the hydraulic brake system after hose replacement will cause a spongy brake pedal. Proper bleeding is required to remove this air.

Question 6

A vehicle's electronic stability control light comes on after front-end collision repairs. Technician A says this could be caused by a misaligned steering angle sensor. Technician B says a damaged ABS wheel speed sensor could cause this. Who is correct?

TheoryPractice · Accepted Answer

Both A and B. Both statements are correct. The electronic stability control system relies on both the steering angle sensor and ABS wheel speed sensors. Damage or misalignment to either can trigger the ESC warning light.

Question 7

When checking brake drum diameter after a collision, measurements should be taken:

TheoryPractice · Accepted Answer

At several points around the circumference. Brake drum measurements should be taken at several points around the circumference to check for out-of-round conditions that could affect braking performance.

Question 8

After replacing a brake master cylinder, what should be done BEFORE test driving the vehicle?

TheoryPractice · Accepted Answer

Bleed the entire brake system. After replacing a master cylinder, proper bleeding of the entire brake system is essential to remove air and ensure safe, proper brake operation before test driving.

Question 9

A vehicle with an ABS system has the brake line damaged in a collision. After replacing the brake line, what should be done if the ABS warning light remains on?

TheoryPractice · Accepted Answer

Use a scan tool to activate the ABS hydraulic control unit for proper bleeding. After brake line replacement, bleeding the ABS system may require special procedures using a scan tool to activate the ABS hydraulic control unit to ensure all air is removed from the system.

Question 10

During brake pad replacement after a collision, a technician notices that the brake caliper piston is difficult to retract. The MOST likely cause is:

TheoryPractice · Accepted Answer

Corrosion inside the caliper bore. Corrosion inside the caliper bore can cause the piston to stick or be difficult to retract. This condition requires caliper rebuilding or replacement to ensure proper brake operation.

ASE B5 Auto Damage Prep Exam Questions & Answers 2026 (21–30)

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