21. Fill in the blanks: Push the _______valve to _______the Tractor parking brake & and Pull the_______valve to _______the Trailer emergency brake
Yellow - release; Red - apply
22. What's the air pressure in the emergency line with the truck on, 100-125 PSI in the tank, and all the springs brakes applied?
0 PSI
23. Where's the Safety Release Valve located?
At the storage tank
24. What's the air pressure in the emergency line with the truck on, 100-125 PSI in the tank, tractor parking brakes released and trailer emergency brakes applied?
0
25. What is the minimum thickness for brake shoes?
1/4 inch.