HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE
NEWEST EXAM COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW!!2025-2026
DURING A HARD STOP, ONE A. THE SERVICE BRAKE CHAMBER DIAPHRAGM HAS
BRAKE HAS LOCKED ON A SPLIT. (POSSIBLE CORRECT ANSWER)
B. THE CAM HAS ROLLED OVER DUE TO TOO MUCH LINING
TRAILER WITH "S" CAM WEAR.
BRAKES. THE SERVICE AND C. THE ANTI-LOCK MODULE HAS BURNED OUT AT
EMERGENCY LINES ARE THE SENDING UNIT. (NOT CORRECT AWNSER)
HOOKED UP PROPERLY AND D. THE CHAMBER SPRING HAS RUSTED AND IS BROKEN.
THE SYSTEM IS AT NORMAL
PRESSURE BUT THE
BRAKES WILL NOT
RELEASE.
WHAT IS THE LIKELY CAUSE
OF THIS PROBLEM?
TOO MUCH EFFORT IS A. SEIZED AUTOMATIC ADJUSTERS.
REQUIRED ON THE BRAKE B. GLAZED LININGS
PEDAL TO STOP A TRUCK C. A DEFECTIVE MODULATOR VALVE. (NOT CORRECT AWNSER)
D. VERY HIGH ENGINE VACUUM. (POSSIBLE CORRECT AWNSER)
WITH A VACUUM
BOOSTER. WHAT IS THE
LIKELY CAUSE OF THIS
PROBLEM?
A. APPLY THE TRACTOR BRAKES BY SPRING PRESSURE. (NOT
WITH THE VALVE PICTURED CORRECT AWNSER)
B. APPLY THE TRAILER BRAKES BY AIR PRESSURE.
BELOW, THE OPERATOR
C. ENGAGE OR DISENGAGE THE PARKING BRAKES.
CAN:
D. APPLY THE TRAILER BRAKES BY SPRING PRESSURE.
A. CONTAMINATION OF THE BRAKE FLUID WITH
IT IS FOUND THAT THE
ENGINE OIL. (POSSIBLE CORRECT AWNSER)
RUBBER DIAPHRAGM IN A
B. ACCIDENTAL MIXING WITH SILICONE BRAKE FLUID.
MASTER CYLINDER COVER
C. MOISTURE IN THE BRAKE FLUID.
IS SWOLLEN TO NEARLY D. ALL OF THE ABOVE. (NOT CORRECT AWNSER)
DOUBLE IN SIZE. THIS
, COULD BE CAUSED BY:
WITH THE ENGINE A. THE BRAKE BOOSTER IS SATISFACTORY. (CORRECT AWNSER)
STOPPED, A MECHANIC B. A LEAKING CHECK VALVE.
HOLDS THE POWER BRAKE C. A TORN DIAPHRAGM.
D. A DEFECTIVE CONTROL VALVE ASSEMBLY.
PEDAL IN THE DEPRESSED
POSITION. THE MECHANIC
THE STARTS THE ENGINE
WITH THE PEDAL STILL
DEPRESSED. THE PEDAL
SINKS SLIGHTLY. WHAT
DOES THIS INDICATE?
A MECHANIC FINDS GEAR A. A BAD PINION SEAL.
LUBE INSIDE BOTH BRAKE B. A PLUGGED AXLE VENT. (CORRECT AWNSER)
DRUMS ON A DRIVING C. A BAD WHEEL BEARING.
D. A BAD DIFFERENTIAL CASE SEAL.
AXLE. WHAT IS THE MOST
LIKELY CAUSE OF THIS
PROBLEM?
A. THE ANCHOR PINS.
WHEN COMPLETING A
B. THE CAMSHAFTS. (POSSIBLE CORRECT AWNSER)
BRAKE RELINE, WHAT
C. THE SLACK ADJUSTER. (NOT CORRECT AWNSER)
BRAKE LINKAGE SHOULD
D. ALL OF THE ABOVE.
THE MECHANIC
LUBRICATE?
NEWEST EXAM COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
A+||BRAND NEW!!2025-2026
DURING A HARD STOP, ONE A. THE SERVICE BRAKE CHAMBER DIAPHRAGM HAS
BRAKE HAS LOCKED ON A SPLIT. (POSSIBLE CORRECT ANSWER)
B. THE CAM HAS ROLLED OVER DUE TO TOO MUCH LINING
TRAILER WITH "S" CAM WEAR.
BRAKES. THE SERVICE AND C. THE ANTI-LOCK MODULE HAS BURNED OUT AT
EMERGENCY LINES ARE THE SENDING UNIT. (NOT CORRECT AWNSER)
HOOKED UP PROPERLY AND D. THE CHAMBER SPRING HAS RUSTED AND IS BROKEN.
THE SYSTEM IS AT NORMAL
PRESSURE BUT THE
BRAKES WILL NOT
RELEASE.
WHAT IS THE LIKELY CAUSE
OF THIS PROBLEM?
TOO MUCH EFFORT IS A. SEIZED AUTOMATIC ADJUSTERS.
REQUIRED ON THE BRAKE B. GLAZED LININGS
PEDAL TO STOP A TRUCK C. A DEFECTIVE MODULATOR VALVE. (NOT CORRECT AWNSER)
D. VERY HIGH ENGINE VACUUM. (POSSIBLE CORRECT AWNSER)
WITH A VACUUM
BOOSTER. WHAT IS THE
LIKELY CAUSE OF THIS
PROBLEM?
A. APPLY THE TRACTOR BRAKES BY SPRING PRESSURE. (NOT
WITH THE VALVE PICTURED CORRECT AWNSER)
B. APPLY THE TRAILER BRAKES BY AIR PRESSURE.
BELOW, THE OPERATOR
C. ENGAGE OR DISENGAGE THE PARKING BRAKES.
CAN:
D. APPLY THE TRAILER BRAKES BY SPRING PRESSURE.
A. CONTAMINATION OF THE BRAKE FLUID WITH
IT IS FOUND THAT THE
ENGINE OIL. (POSSIBLE CORRECT AWNSER)
RUBBER DIAPHRAGM IN A
B. ACCIDENTAL MIXING WITH SILICONE BRAKE FLUID.
MASTER CYLINDER COVER
C. MOISTURE IN THE BRAKE FLUID.
IS SWOLLEN TO NEARLY D. ALL OF THE ABOVE. (NOT CORRECT AWNSER)
DOUBLE IN SIZE. THIS
, COULD BE CAUSED BY:
WITH THE ENGINE A. THE BRAKE BOOSTER IS SATISFACTORY. (CORRECT AWNSER)
STOPPED, A MECHANIC B. A LEAKING CHECK VALVE.
HOLDS THE POWER BRAKE C. A TORN DIAPHRAGM.
D. A DEFECTIVE CONTROL VALVE ASSEMBLY.
PEDAL IN THE DEPRESSED
POSITION. THE MECHANIC
THE STARTS THE ENGINE
WITH THE PEDAL STILL
DEPRESSED. THE PEDAL
SINKS SLIGHTLY. WHAT
DOES THIS INDICATE?
A MECHANIC FINDS GEAR A. A BAD PINION SEAL.
LUBE INSIDE BOTH BRAKE B. A PLUGGED AXLE VENT. (CORRECT AWNSER)
DRUMS ON A DRIVING C. A BAD WHEEL BEARING.
D. A BAD DIFFERENTIAL CASE SEAL.
AXLE. WHAT IS THE MOST
LIKELY CAUSE OF THIS
PROBLEM?
A. THE ANCHOR PINS.
WHEN COMPLETING A
B. THE CAMSHAFTS. (POSSIBLE CORRECT AWNSER)
BRAKE RELINE, WHAT
C. THE SLACK ADJUSTER. (NOT CORRECT AWNSER)
BRAKE LINKAGE SHOULD
D. ALL OF THE ABOVE.
THE MECHANIC
LUBRICATE?
