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HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE LATEST UPDATED $11.49
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HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE LATEST UPDATED

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  • MICHIGAN STATE BRAKES
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  • MICHIGAN STATE BRAKES

HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE LATEST UPDATED AN ENGINE BRAKE (JACOBS BRAKE) - ANSWER ️️ A. IS A SELF-ENERGIZING SERVO TYPE. B. IS NORMALLY USED IN PLACE OF A SPRING BRAKE. C. RESTRICTS THE INTAKE PORT AND CAUSES A BUILD UP OF 30-45 LBS OF PRESSURE. D. OPENS THE EXHAUST...

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  • December 10, 2023
  • 10
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

Subjects

  • heavy truck brakes michigan mechanic study guide

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  • MICHIGAN STATE BRAKES
  • MICHIGAN STATE BRAKES

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By: KatelynWhitman • 11 months ago

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HEA VY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE LATEST UPDATED AN ENGINE BRA KE (JACOBS BRAKE) - ANSWER ✔️✔️A. IS A SELF -ENERGIZING SERVO TYPE. B. IS NORMALLY USED IN PLACE OF A SPRING BRAKE. C. RESTRICTS THE INTAKE PORT AND CAUSES A BUILD UP OF 30 -45 LBS OF PRESSURE. D. OPENS THE EXHAUST VALVES NEAR THE TOP OF THE COMPRESSION STR OKE TO RELEASE THE COMPRESSED AIR. (CORRECT AWNSER) IN THE SYSTEM SHOWN BELOW, THE PART AT C IS: - ANSWER ✔️✔️A. AN INVERSION VALVE. (POSSIBLE CORRECT AWNSER) B. A SAFETY VALVE. C. A MODULATOR VALVE. (NOT CORRECT AWNSER) D. A RELAY VALVE. A MECHANIC HAS REMOVED A BRAKE DRUM AND FOUND THE BRAKE LININGS SOAKED WITH GREASE. THE BRAKE LININGS SHOULD BE: - ANSWER ✔️✔️A. REPLACED. (CORRECT AWNSER) B. SANDED TO ROUGHEN UP THE FRICTION SURFACE. C. DIPPED IN LACQUER THINNER. D. WASHED WITH DENATURE D ALCOHOL. IN THE DRAWING BELOW, THE PARKING BRAKES ARE APPLIED BY: - ANSWER ✔️✔️A. AIR PRESSURE AT POINT F. B. VACUUM IN AREA B. C. SPRING AT POINT C. D. PRESSURE IN AREA A. (NOT CORRECT AWNSER) WHAT IS THE PURPOSE OF A VACUUM BOOSTER? - ANSWER ✔️✔️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. THE TRAILER BRAKES DO NOT WORK. THE TRACTOR SYSTEM IS AT NORMAL PRESSURE. THERE ARE NO LEAKS AND THE SERVICE AND EMERGENCY LINES ARE HOOKED UP RIGHT. WHAT COULD CAUSE THIS PROBLEM? - ANSWER ✔️✔️A. ICE IN THE LINES AT THE TRAILER. B. A BAD RELAY VALVE. C. A BAD SAFETY RELIEF VALVE . D. BOTH A AND B. (CORRECT AWNSER) THE RESIDUAL VALVE IN THE MASTER CYLINDER: - ANSWER ✔️✔️A. LIMITS PRESSURE BUILD UP IN THE SYSTEM. B. STOPS THE FLOW TO DAMAGED BRAKE LINES. C. KEEPS SOME PRESSURE IN THE SYTEM WHEN THE BRAKES ARE RELEASED. (CORRECT AWN SER) D. IS OPERATED BY ENGINE VACUUM. HIGHER THAN NORMAL AIR PRESSURE WOULD LIKELY BE CAUSED BY: - ANSWER ✔️✔️A. A GOVENOR THAT IS BAD OR OUT OF ADJUSTMENT. (POSSIBLE CORRECT AWNSER) B. A PLUGGED SAFETY VALVE. (NOT CORRECT AWNSER) C. A ONE -WAY CHECK VALVE STUCK OPEN. D. A STICKY QUICK RELEASE VALVE. IF GLADHAND 2 IS UNHOOKED OR HAS A SEVERE LEAK, WHAT WILL HAPPEN DURING OPERATION? - ANSWER ✔️✔️A. VALVE AT A WILL PROTECT THE PRESSURE IN THE DRY TANK. B. TRACTOR BRAKES WILL APPLY AUTOMATICALLY. (NOT CORRECT AWNSER) C. VALVE AT C WILL APPLY TRAILER BRAKES. D. VALVE AT B WILL APPLY TRAILER BRAKES. DURING A HARD STOP, ONE BRAKE HAS LOCKED ON A TRAILER WITH "S" CAM BRAKES. THE SERVICE AND EMERGENCY LINES AR E HOOKED UP PROPERLY AND THE SYSTEM IS AT NORMAL PRESSURE BUT THE BRAKES WILL NOT RELEASE. WHAT IS THE LIKELY CAUSE OF THIS PROBLEM? - ANSWER ✔️✔️A. THE SERVICE BRAKE CHAMBER DIAPHRAGM HAS SPLIT. (POSSIBLE CORRECT AWNSER)

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