Truck Brakes Michigan Mechanic Study Guide 2024 | 50 Questions With 100% Correct Detailed Answers With Rationales | Verified |a+ Graded

TOO MUCH EFFORT IS REQUIRED ON THE BRAKE PEDAL TO STOP A TRUCK WITH A VACUUM BOOSTER. WHAT IS THE LIKELY CAUSE OF THIS PROBLEM? {Ans: A. SEIZED AUTOMATIC ADJUSTERS. B. GLAZED LININGS C. A DEFECTIVE MODULATOR VALVE. (NOT CORRECT AWNSER) D. VERY HIGH ENGINE VACUUM. (POSSIBLE CORRECT AWNSER)}WHICH OF THE FOLLOWING WILL NOT CAUSE BRAKE CHATTER? {Ans: A. WORN ANCHOR PIN HOLES IN SHOES. B. A STICKY OR RUSTY GOVENOR PISTON. (POSSIBLE CORRECT AWNSER) C. WORN CAM BUSHINGS. D. LOOSE WHEEL BEARINGS. (NOT CORRECT AWNSER)}WHAT IS THE PURPOSE OF A VACUUM BOOSTER? {Ans: A. TO DECREASE BRAKE PEDAL EFFORT. (POSSIBLE CORRECT AWNSER) B. TO PREVENT FADE UNDER HEAVY BRAKING. C. TO PROVIDE ASSISTANCE WHEN THE ENGINE VACUUM IS LOW. (NOT CORRECT AWNSER) D. TO MAINTAIN UNIFORM PEDAL TRAVEL AS THE LININGS WEAR.}HYDRAULIC BRAKE LINES ARE MADE OF: {Ans: A. ALUMINUM. B. REINFORCED BRASS. C. SEAMLESS COPPER TUBING. D. STEEL. (CORRECT AWNSER)}WITH THE AIR BRAKES IN THE APPLIED POSITION ON A TRACTOR TRAILER, WHAT IS AN ACCEPTABLE AIR PRESSURE LOSS IN THE SYSTEM? {Ans: A. THE PRESSURE SHOULD NOT DROP AT ALL IN PERIOD OF ONE MINUTE. (NOT CORRECT AWNSER) B. 25 PSI/MINUTE. C. 15