HEAVY TRUCK BRAKES MICHIGAN MECHANIC Competency Exam Study Guide Comprehensive Resource To Help You Ace Includes Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS Guaranteed Pass First Attempt!! Current Update!!

HEAVY TRUCK BRAKES MICHIGAN MECHANIC Competency Exam Study Guide Comprehensive Resource To Help You Ace Includes Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS Guaranteed Pass First Attempt!! Current Update!! 1. AIR BRAKE LINES ARE MSOT OFTEN MADE OF: A. BRASS AND ALUMINUM. B. STEELAND NYLON. C. NYLON AND BRASS. D. COPPER AND NYLON. (CORRECT AWNSER) 2. TO FIND LEAKS IN AIRLINE FITTINGS AND SERVICE CHAMBERS, YOU SHOULD USE: A. A HALIDE LEAK DETECTOR. B. A VACUUM GAUGE. (NOT CORRECT AWNSER) C. A BRAKE PRESSURE BLEEDER. D. A SOAP SUDS MIXTURE. (POSSIBLE CORRECT AWNSER) 3. A LIKELY CAUSE OF GRABBING BRAKES ON A DRIVE AXLE WOULD BE: A. A BAD QUICK RELEASE VALVE. (NOT CORRECT AWNSER) B. BRAKES ADJUSTED TOO TIGHT. (POSSIBLE CORRECT AWNSER) C. GREASE OR GEAR LUBE ON LININGS. D. WEAK SHOE RETURN SPRINGS. 4. THE HYDRAULIC SERVICE BRAKES WILL NOT RELEASE FULLY. WHAT SHOULD YOU DO FIRST? - Correct Answer: A. CHECK THE MASTER CYLINDER FOR DEFECTS. (CORRECT AWNSER) B. CHECK FOR A DEFECTIVE QUICK RELEASE VALVE. C. RUN AN ENGINE VACUUM TEST. D. CHECK THE BRAKE DRUMS. 5. IN THE SYSTEM SHOWN BELOW, AIR LEAKS FROM THE RELAY VALVE EXHAUST PORT ALL THE TIME. THE LIKELY CAUSE OF THIS PROBLEM IS: A LEAKY SEAL IN THE PART AT POINT D. B. A LEAKY SEAL IN THE PART AT POINT C. (CORRECT AWNSER) C. A LEAKY SEAL IN THE PART AT POINT E. D. A LEKAY SEAL IN THE PART AT POINT A. 6. IN THE DRAWING BELOW, THE DIAPHRAGM AT POINT E HAS FAILED. WHAT MUST YOU DO BEFORE MOVING THE TRUCK? - Correct Answer: A. COMPRESS THE SPRING AT POINT D. (NOT CORRECT AWNSER) B. APPLY AIR PRESSURE TO POINT F. C. COMPRESS THE SPRING AT POINT F. D. RELEASE AIR PRESSURE AT AREA B. 7. IN THE DRAWING BELOW: A. THE PARKING BRAKES ARE APPLIED AND THE SERVICE BRAKES ARE RELEASED. B. BOTH PARKING AND SERVICE BRAKES ARE RELEASED. C. THE SERVICE BRAKES ARE APPLIED AND THE PARKING BRAKES ARE RELEASED. D. BOTH PARKING AND SERVICE BRAKES ARE APPLIED. (NOT CORRECT AWNSER) 8. THE TRAILER BRAKES DO NOT RELEASE PROPERLY. THE AIR PRESSUREIS NORMAL AND THE EMERGENCY SERVICE LINES ARE HOOKED UP PROPERLY. THE PROBLEM COULD BE CAUSED BY: - A. DRY OR BINDING CAM BUSHINGS. B. A BAD RELAY EMERGENCY VALVE. C. A FOOT VALVE NOT RETURNING TO A FULLY RELEASED POSITION. D. ALL OF THE ABOVE. (CORRECT AWNSER) 9. WHAT SHOULD YOU DO FIRST BEFORE REPLACING THE DIAPHRAGM ON A SPRING BRAKE TYPE EMERGENCY BRAKE CHAMBER? A. COMPRESS THE SPRING BRAKE. (POSSIBLE CORRECT AWNSER) B. BACK OFF THE SLACK ADJSUTER. C. DISCONNECT THE PUSH ROD CLEVIS. D. COMPRESS THE DIAPHRAGM RETURN SPRING. (NOT CORRECT AWNSER) 10. CAM ACTUATED BRAKE SHOES ARE FOUND TO BE MAKING ONLY PARTIAL CONTACT WITH THE DRUM. TO CORRECT THIS CONDITION, ADJUSTMENT SHOULD BE MADE TO THE: A. ACTUATOR CABLE. B. APPLYING WEDGE. C. ECCENTRIC ANCHOR PINS. (CORRECT AWNSER) D. ROLLER FOLLOWER.