What is the acceptable pressure gauge reading range for an oxygen system after a 6-hour period if initially read 460 PSI?

In oxygen systems, it’s important to monitor the pressure gauge readings to ensure the system remains functionally safe and efficient. The readings can be affected by a variety of factors, such as temperature changes and system integrity.

Starting at an initial pressure of 460 PSI, a typical expectation is that after a prolonged period, such as six hours, the gauge should show a slight decrease due to the natural loss of pressure over time through minor leaks or the effects of temperature changes. The acceptable range would be identified by considering typical allowable drop thresholds for standard systems.

The choice indicating 445 to 450 PSI is appropriate because it reflects a realistic and acceptable decrease in pressure while still allowing for operation within safe boundaries. This range acknowledges the typical operational tolerances and shows an understanding of how environmental factors can influence pressure measurements.

Options that suggest lower or higher ranges either indicate a pressure drop beyond normal expectations or suggest an increase that is impractical based on operational considerations, making the selected range the most suitable and well-informed answer for this scenario.