Question

why would you need to purge a cylinder? select all that apply. the cylinder was opened to the atmosphere. the cylinder was not purged by the manufacturer. the cylinder still has some propane in it.

Explanation:

Purging a cylinder is often needed when it has been opened to the atmosphere as air and contaminants can enter, and also when it was not purged by the manufacturer to ensure it contains the correct and pure gas. Having some propane left in it is not a reason for purging in the context of these concerns.

Answer:

A. The cylinder was opened to the atmosphere.
B. The cylinder was not purged by the manufacturer.