At what flow rate of oxygen can an E-cylinder with a pressure of 1500 psig deliver oxygen for 2.5 hours?

To determine the flow rate of oxygen that allows an E-cylinder with a pressure of 1500 psig to deliver oxygen for 2.5 hours, it's essential to understand how to calculate the duration of oxygen delivery based on a specific flow rate.

First, it is crucial to know the capacity of an E-cylinder, which generally holds about 660 liters of oxygen when full. The pressure of 1500 psig suggests that a significant amount of oxygen is still available in the tank.

When calculating how long the oxygen will last at different flow rates, we can use the formula:

Duration (in minutes) = (Cylinder capacity in liters) / (Flow rate in liters per minute)

For 2.5 hours, we convert that into minutes:

2.5 hours = 150 minutes

Now, if we set up the equation for the desired flow rate that corresponds to 150 minutes of usage:

150 minutes = 660 liters / Flow rate

To find the flow rate that will allow for 150 minutes of oxygen delivery, we can rearrange this equation:

Flow rate = 660 liters / 150 minutes ≈ 4.4 L/min

However, since the flow rate options are integers, you would look for the closest