ASE A5 BRAKES EXAM LATEST ACTUAL EXAM |80 QUESTIONS WITH CORRECT & DETAILED ANSWERS (VERIFIED ANSWERS)

ASE A5 BRAKES EXAM LATEST ACTUAL EXAM |80 QUESTIONS WITH CORRECT & DETAILED ANSWERS (VERIFIED ANSWERS) On a car with disc/drum brakes, the front brakes grab quickly when light pedal pressure is applied. This problem could be caused by a bad: A. Proportioning valve B. Pressure safety switch C. Metering valve D. Residual check valve - Correct Answer The correct answer is C. The metering valve delays the flow of brake fluid to the front calipers until the pressure in the system rises to a point where the wheel cylinder can overcome the tension of the brake shoe returning spring. The purpose is to have both front and rear brakes apply simultaneously. This prevents the front brakes from locking up during light brake applications. The driver of a vehicle with power disc/drum brakes says that the brake pedal moved slowly to the floor while maintaining pedal pressure at a stoplight. What could cause this problem? A. Leaking primary piston cup in master cylinder B. Leaking power brake booster C. Leaking residual check valve in master cylinder D. Internal leak in the combination valve - Correct Answer The correct answer is A. if the primary piston cup in the master cylinder is leaking, pressure will not build up ahead of the primary piston to increase pressure to the rear brakes. The piston will then move forward until the spring is compressed enough to move the secondary piston. Consequently, this internal leak will cause the brake pedal to slowly drop to the floor.