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Hi guys,

I've been studying for the 608 exam for a few weeks now. Tonight I'm flipping through 100 or so flashcards I found online*.

I've seen several questions which refer to "non pressurized containers". Here is an example:

Question: A standard vacuum pump designed for evacuation & dehydration can:
Answer: only be used as a recovery device in combination with a non pressurized container.

Would someone be so kind to explain what is this non-pressurized container of which they speak? Won't ANY closed container rise to the pressure on a PT chart? And doesn't "non-pressurized" imply open, and therefore venting?

Thank you. --Upton

(* For those interested, the ones I'm doing tonight can be found here.)
 

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