ASE A5 Brakes Automotive Certification Test Questions and Answers

The brakes are being bled on an older vehicle equipped with a quick take up valve in the master cylinder. Technician A says the quick take up valve must be depressed. Technician B says the brakes on this vehicle cannot be bled. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B Both technicians are wrong. The brakes on quick take up systems use the same bleeding procedure as those without this valve. A spongy brake pedal may be caused by: a. ABS Diagnostic Trouble Code set b. Frozen caliper piston c. Defective metering valve. d. Air in hydraulic system Air causes a gap in the hydraulic fluid flow because the fluid has to compress the air before it can apply the piston. This delay causes the spongy feel. The other choices do not affect this concern. This question has the word EXCEPT. For this question, look for the choice that could NOT cause the described situation. Read the entire question carefully before choosing your answer. A vehicle has a very erratic brake pulling concern while applying the brakes. All of the following items could cause this erratic pull EXCEPT: a. Excessive tire pressure b. Four-wheel alignment c. Seized caliper piston on the other side d. Steering gear problem Excessive tire pressure is the exception because this fault will cause tire wear but not a pull. Low or uneven tire pressure can cause a pull. A power assist brake booster push rod that is to short will cause which of the following? a. Excessive brake drag b. Brake system to be inoperative c. Excessive brake pedal travel d. Brake light is illuminated A short push rod length will have to travel farther for contact and result in excessive pedal travel. A vehicle with disc/drum brakes requires excessive brake pedal effort to stop. The brake pedal is firm when applied. While starting the engine with the brakes applied, the pedal does not go down slightly. Technician A says excessive brake pedal freeplay could be the cause. Technician B says air trapped in the hydraulic system could be the cause. Who is right? a. A only b. B only c. Both A and B d. Neither A nor B Both technicians are wrong because the problem is in the power booster. Excessive freeplay delays application and air in the hydraulic system will cause a spongy pedal. Which of the following conditions can cause brake pedal fade? a. Seized wheel cylinder piston b. Brake drum machined beyond its limit c. Leakage past the master cylinder cups d. Air in the hydraulic system The greatest drawback of drum brakes is that they are susceptible to fade. Brake fade is loss of stopping power that occurs when excessive heat reduces friction between brake shoe linings and drum. There are four types of brake fade. Mechanical fade occurs when the brake drum gets so hot it expands away from the brake linings. If the brake drum is machined beyond its limit the contact surface is further from the brake shoes and they move outward to maintain contact with the drum, causing the brake pedal to drop toward the floor as additional brake fluid moves into the hydraulic system. The other 3 choices would not cause brake fade. The rear brake linings are soaked with axle grease but still have a lot of lining left on them. Which is the correct way to service these brakes? a. Replace the brake linings b. Wash in hot, soapy water and dry. c. Clean with approved cleaner and reuse d. Repair leak and replace brake linings