ASE T4 Domain 2: Hydraulic Brakes Diagnosis and Repair Welcome to your ASE T4 Domain 2: Hydraulic Brakes Diagnosis and Repair 1. ASE T4: Hydraulic Brakes Diagnosis and Repair When diagnosing a hydraulic brake system, the technician notes that the brake pedal feels spongy even after bleeding the system. The most likely cause is: A. Air trapped in the ABS modulator B. Worn brake pads C. A leak in the master cylinder D. Faulty brake hoses None 2. ASE T4: Hydraulic Brakes Diagnosis and Repair A technician finds that a hydraulic brake system is losing fluid but no external leaks are visible. The most likely cause of this is: A. A leaking wheel cylinder B. Brake fluid being absorbed by the brake pads C. Internal leakage in the master cylinder D. Cracked brake lines None 3. ASE T4: Hydraulic Brakes Diagnosis and Repair A heavy-duty truck experiences reduced braking efficiency and a hissing noise is heard when the brake pedal is depressed. The most probable cause is: A. Air in the hydraulic lines B. A faulty vacuum booster C. Brake lining contamination D. Worn disc brake rotors None 4. ASE T4: Hydraulic Brakes Diagnosis and Repair After replacing the rear brake lines on a truck, the technician notices that the rear brakes lock up during light braking. The most likely cause is: A. Overfilled brake fluid reservoir B. Incorrectly adjusted proportioning valve C. Misaligned brake shoes D. Faulty ABS sensors None 5. ASE T4: Hydraulic Brakes Diagnosis and Repair A truck's brake pedal goes to the floor and the brake warning light is on. However, there are no visible leaks and the master cylinder reservoir is full. The FIRST step to diagnose this issue should be: A. Checking for a faulty brake booster B. Inspecting the brake pads and rotors C. Testing for a defective master cylinder D. Bleeding the brake lines None 6. ASE T4: Hydraulic Brakes Diagnosis and Repair During a brake system inspection, a technician finds that the front brake hoses are bulging under pressure. This is indicative of: A. Worn brake pads B. Contaminated brake fluid C. Weak or damaged brake hoses D. A faulty ABS control unit None 7. ASE T4: Hydraulic Brakes Diagnosis and Repair A technician is diagnosing a hydraulic brake system and finds that one front wheel is not braking effectively. The most likely cause is: A. A seized caliper piston on the affected wheel B. Uneven wear on brake pads C. Air in the hydraulic system D. A defective ABS sensor None 8. ASE T4: Hydraulic Brakes Diagnosis and Repair After changing the brake pads on a truck, the technician notices that the pedal travel is excessive before the brakes engage. The FIRST thing to check should be: A. The brake fluid level B. The adjustment of the brake pads C. The condition of the brake rotors D. The brake booster operation None 9. ASE T4: Hydraulic Brakes Diagnosis and Repair In a hydraulic brake system, a technician finds that the ABS light turns on intermittently. The MOST likely cause of this issue is: A. Low brake fluid level B. Faulty wheel speed sensor C. Worn brake pads D. Damaged brake lines None 10. ASE T4: Hydraulic Brakes Diagnosis and Repair A vehicle with hydraulic brakes shows a tendency for one front wheel to lock up before the others during hard braking. The most likely cause is: A. A defective ABS modulator B. A malfunctioning master cylinder C. A sticking brake caliper on that wheel D. Unequal tire pressure None 1 out of 10 Time is Up! Time's up
