When loading compressed gas, the liquid discharge valves should be: Question When loading compressed gas, the liquid discharge valves should be: Answers Closed. Greased. Opened. Explanation Keep liquid discharge valves on a compressed gas tank closed except when loading and unloading. This questions appears in the following tests: Connecticut HazMat Idaho HazMat Iowa HazMat Kentucky HazMat Louisiana HazMat Tennessee HazMat Vermont HazMat Virginia HazMat Virginia Tank
