MICHIGAN STATE BRAKES STUDY GUIDE EXAM QUESTIONS AND SOLUTIONS RATED A+

MICHIGAN STATE BRAKES STUDY GUIDE EXAM
QUESTIONS AND SOLUTIONS RATED A+
✔✔WHAT IS THE FUNCTION OF THE INVERSION VALVE USED ON A STRAIGHT
TRUCK WITH DUAL AIR BRAKE SYSTEM? - ✔✔A. IT ALLOWS A MODULATED
SPRING BRAKE APPLICATION ON THE REAR AXLE IF AIR PRESSURE IS APPLIED
TO IT.
B. IT PREVENTS THE SPRING BRAKE FROM APPLYING DURING PERIODS OF
LOW AIR PRESSURE BECAUSE OF A PANIC STOP.
C. IT REVERSES THE SIRECTION OF THE AIR IN THE PRIMARY SYSTEM TO
HELP RELEASE THE BRAKES.
D. IT ALLOWS A MODULATED SPRING BRAKE APPLICATION IN AN AIR LOSS
OCCURS IN THE PRIMARY PORTION OF THE SYSTEM. (CORRECT AWNSER)

✔✔THE UNIT SHOWN BELOW IS: - ✔✔A. AN ANTI-SKID RELAY EMERGENCY
VALVE.
B. A SPRING BRAKE CHAMBER.
C. A VACUUM BOOSTER. (CORRECT AWNSER)
D. A SEQUECE/PRIORITY VALVE.

✔✔WHICH OF THE FOLLOWING WILL NOT CAUSE BRAKE CHATTER? - ✔✔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)

✔✔A MECHANIC FINDS THAT THE BRAKE LINING IS WORN VERY MUCH NEAR
THE EDGE. WHAT WOULD CAUSE THIS TO HAPPEN? - ✔✔A. BELL MOUTHED
BRAKE DRUMS.
B. WORN-OUT ANCHOR PIN HOLES IN THE BRAKE SHOE.
C. A BENT BRAKE SHOE WEB.
D. ALL OF THE ABOVE. (CORRECT AWNSER)

✔✔WHICH ONE OF THESE SHOULD BE DONE MOST FREQUENTLY? - ✔✔A.
ADJUST THE SPIDERS.
B. LUBRICATE THE "S" CAM.
C. CHECK THE BRAKE CHAMBERS FOR MOISTURE. (NOT CORRECT AWNSER)
D. CHECK THE BRAKE CHAMBER PUSH ROD TRAVEL. (POSSIBLE CORRECT
AWNSER)

✔✔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)

, ✔✔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)

✔✔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.

✔✔THE HYDRAULIC SERVICE BRAKES WILL NOT RELEASE FULLY. WHAT
SHOULD YOU DO FIRST? - ✔✔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.

✔✔IN THE SYSTEM SHOWN BELOW, AIR LEAKS FROM THE RELAY VALVE
EXHAUST PORT ALL THE TIME. THE LIKELY CAUSE OF THIS PROBLEM IS: -
✔✔A. 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.

✔✔IN THE DRAWING BELOW, THE DIAPHRAGM AT POINT E HAS FAILED. WHAT
MUST YOU DO BEFORE MOVING THE TRUCK? - ✔✔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.

✔✔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)

✔✔THE TRAILER BRAKES DO NOT RELEASE PROPERLY. THE AIR PRESSUREIS
NORMAL AND THE EMERGENCY SERVICE LINES ARE HOOKED UP PROPERLY.