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HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE 2024 Questions & Correct Answers With 100% Guarantee Pass () Verified By Experts $13.49   Add to cart

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HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE 2024 Questions & Correct Answers With 100% Guarantee Pass () Verified By Experts

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  • Heavy truck
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HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE 2024 Questions & Correct Answers With 100% Guarantee Pass () Verified By Experts

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  • September 12, 2024
  • 17
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Heavy truck
  • Heavy truck
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HEAVY TRUCK BRAKES MICHIGAN MECHANIC STUDY GUIDE.pdf file:///C:/Users/HP/Desktop/New%20fo/HEAVY%20TRUCK%20B




HEAVY TRUCK BRAKES MICHIGAN MECHANIC

STUDY GUIDE



1. AN ENGINE BRAKE (JACOBS BRAKE): 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 STROKE

TO RELEASE THE COMPRESSED AIR. (CORRECT AWNSER)

2. IN THE SYSTEM SHOWN BELOW,THE PART AT C IS:: A. AN INVERSION

VALVE. (POSSIBLE CORRECT AWNSER)

B. A SAFETY VALVE.

C. A MODULATOR VALVE. (NOT CORRECT AWNSER)

D. A RELAY VALVE.

3. A MECHANIC HAS REMOVED A BRAKE DRUM AND FOUND THE BRAKE

LININGS SOAKED WITH GREASE.THE BRAKE LININGS SHOULD BE:: A. RE-

PLACED. (CORRECT AWNSER)
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B. SANDED TO ROUGHEN UP THE FRICTION SURFACE.

C. DIPPED IN LACQUER THINNER.

D. WASHED WITH DENATURED ALCOHOL.

4. INTHE DRAWING BELOW,THE PARKING BRAKES ARE APPLIED BY:: A.AIR

PRESSURE AT POINT F.

B. VACUUM IN AREA B.

C. SPRING AT POINT C.

D. PRESSURE IN AREA A. (NOT CORRECT AWNSER)

5. WHAT IS THE PURPOSE OF A VACUUM BOOSTER?: 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.

6. THETRAILER BRAKES DO NOTWORK.THETRACTOR SYSTEM IS AT NOR- MAL

PRESSURE. THERE ARE NO LEAKS AND THE SERVICE AND EMER- GENCY LINES

ARE HOOKED UP RIGHT. WHAT COULD CAUSE THIS PROB- LEM?: A. ICE IN THE

LINES AT THE TRAILER.

B. A BAD RELAY VALVE.
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C. A BAD SAFETY RELIEF VALVE.

D. BOTH A AND B. (CORRECT AWNSER)

7. THE RESIDUAL VALVE IN THE MASTER CYLINDER:: A. LIMITS PRESSURE BUILD

UP IN THE SYSTEM.

B. STOPS THE FLOW TO DAMAGED BRAKE LINES.




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