Home › CDL Practice Tests › Air Brakes Questions › Question 38
In cold weather, what is the specific danger of water left in the air tanks and lines?
- A.It can freeze and block air flow, preventing brakes from applying or releasing properly
- B.It makes the brakes apply too smoothly
- C.It increases tire grip on ice
- D.It only makes the drain valve drip
Correct answer
A. It can freeze and block air flow, preventing brakes from applying or releasing properly
Why
Ice in a valve or line can trap pressure or starve a chamber with no warning to the driver. Daily draining, plus checking that any alcohol evaporator is filled when equipped, is the defense against that failure.
Manual topic: Air Brakes - Air Tanks and Drains · From the Air Brakes practice bank (AB-038).