An air application gauge shows you:
A. How much air pressure is in your tanks.
B. How much air pressure you are applying to the brakes.
C. How much air pressure is escaping through your brake chamber.
Answer: B. How much air pressure you are applying to the brakes.
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.