What would the gauge read on a HALF FULL cylinder of oxygen?

The correct answer is that a half-full cylinder of oxygen would typically read around 1000 psi. This is based on the standard behavior of oxygen cylinders, which are usually filled with oxygen at a pressure of approximately 2000 psi when fully charged.

When the cylinder is half full, the pressure indicated on the gauge generally approximates half of its full capacity. Therefore, if a full cylinder is at 2000 psi, a half-full cylinder would reasonably read around 1000 psi. It's important to note that this pressure may vary slightly based on temperature and cylinder specifics, but 1000 psi is a widely accepted approximation for a half-full medical oxygen cylinder.

Understanding this principle is crucial for healthcare providers and professionals who manage oxygen therapy, as evaluating cylinder pressure impacts patient care and safety in various medical situations.