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Select the best answer for the question.

Acetylene cylinders should be changed over when they reach the minimum usable gauge pressure of:

A. 15 psig
B. 20 psig
C. 25 psig
D. 10 psig

Answer :

For the question about the minimum usable gauge pressure at which acetylene cylinders should be changed over, let's go through the options and find the best answer:

Acetylene is a common fuel gas used in welding and cutting operations. It is important to change the cylinder at the appropriate minimum pressure to ensure safety and maintain proper function. Typically, manufacturers and safety guidelines recommend changing over acetylene cylinders at a certain pressure to avoid issues such as backflow or unsafe pressure levels.

For acetylene cylinders, the recommended minimum usable gauge pressure is typically 20 psig. This is to ensure that the flow and pressure remain adequate for safe and effective operation before it falls too low, which could lead to inefficient performance or increased risk of hazards.

Therefore, the best choice from the given options is:
- B. 20 psig

This is a safety guideline followed in many standard practices for acetylene cylinder usage. Always ensure to refer to specific equipment manuals or safety data from manufacturers for precise and current guidance.

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