HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE EXAM
LATEST 2026|2027 UPDATED QUESTIONS WITH DETAILED VERIFIED
ANSWERS (100%) | ALREADY GRADED A+
WHAT SHOULD YOU DO FIRST BEFORE REPLACING THE DIAPHRAGM ON A SPRING BRAKE TYPE EMERGENCY
BRAKE CHAMBER? - Correct Answer -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)
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: - Correct Answer -A. ACTUATOR CABLE.
B. APPLYING WEDGE.
C. ECCENTRIC ANCHOR PINS. (CORRECT AWNSER)
D. ROLLER FOLLOWER.
WATER SHOULD BE DRAINED FROM AIR RESERVOIRS: - Correct Answer -A. BEFORE ADJUSTING SLACK
ADJUSTERS.
B. DAILY OR MORE FREQUENTLY IN COLD OR MOIST WEATHER. (CORRECT AWNSER)
C. BEFORE ANY ATTEMPT IS MADE TO REPLACE A SERVICE CHAMBER DIAPHRAGM.
D. TO EXPEL EXCESS OIL PASSED BY THE AIR PUMP.
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, A MECHANIC FINDS THAT THE VACUUM HOSE HOOKS UP TO THE POWER BOOSTER HAS COLLAPSED. WHAT
SHOULD THE MECHANIC DO? - Correct Answer -A. REPLACE THE HOSE. (POSSIBLE CORRECT AWNSER)
B. REPLACE THE CHECK VALVE.
C.REPLACE THE BOOSTER.
D. ALL OF THE ABOVE. (NOT CORRECT AWNSER)
HYDRAULIC BRAKE LINES ARE MADE OF: - Correct Answer -A. ALUMINUM.
B. REINFORCED BRASS.
C. SEAMLESS COPPER TUBING.
D. STEEL. (CORRECT AWNSER)
IN THE SYSTEM SHOWN BELOW, AIR LEAKS FROM THE RELAY VALVE EXHAUST PORT ALL THE TIME. THE LIKELY
CAUSE OF THIS PROBLEM IS: - Correct Answer -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? - 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.
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LATEST 2026|2027 UPDATED QUESTIONS WITH DETAILED VERIFIED
ANSWERS (100%) | ALREADY GRADED A+
WHAT SHOULD YOU DO FIRST BEFORE REPLACING THE DIAPHRAGM ON A SPRING BRAKE TYPE EMERGENCY
BRAKE CHAMBER? - Correct Answer -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)
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: - Correct Answer -A. ACTUATOR CABLE.
B. APPLYING WEDGE.
C. ECCENTRIC ANCHOR PINS. (CORRECT AWNSER)
D. ROLLER FOLLOWER.
WATER SHOULD BE DRAINED FROM AIR RESERVOIRS: - Correct Answer -A. BEFORE ADJUSTING SLACK
ADJUSTERS.
B. DAILY OR MORE FREQUENTLY IN COLD OR MOIST WEATHER. (CORRECT AWNSER)
C. BEFORE ANY ATTEMPT IS MADE TO REPLACE A SERVICE CHAMBER DIAPHRAGM.
D. TO EXPEL EXCESS OIL PASSED BY THE AIR PUMP.
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, A MECHANIC FINDS THAT THE VACUUM HOSE HOOKS UP TO THE POWER BOOSTER HAS COLLAPSED. WHAT
SHOULD THE MECHANIC DO? - Correct Answer -A. REPLACE THE HOSE. (POSSIBLE CORRECT AWNSER)
B. REPLACE THE CHECK VALVE.
C.REPLACE THE BOOSTER.
D. ALL OF THE ABOVE. (NOT CORRECT AWNSER)
HYDRAULIC BRAKE LINES ARE MADE OF: - Correct Answer -A. ALUMINUM.
B. REINFORCED BRASS.
C. SEAMLESS COPPER TUBING.
D. STEEL. (CORRECT AWNSER)
IN THE SYSTEM SHOWN BELOW, AIR LEAKS FROM THE RELAY VALVE EXHAUST PORT ALL THE TIME. THE LIKELY
CAUSE OF THIS PROBLEM IS: - Correct Answer -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? - 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.
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