Air tank drains:

Question

In an air brake system, the air storage tanks must be drained to remove accumulated water and compressor oil. Failing to do so can cause damage. Manually operated drains should be used at the end of each day of driving.

Accepted Answer

Are used to drain water and compressor oil from the air tank.

Answer

Allow rain water to enter the tank.

Answer

Should never be opened.

Answer

Must remain open during transit.