How long can you expect to use a D cylinder (cylinder constant 0.16) reading 1500 psi while delivering oxygen at 15 L/min?

To determine how long you can expect to use a D cylinder of oxygen, you need to calculate the duration based on the pressure in psi, the flow rate in liters per minute, and the cylinder constant.

In this scenario, the D cylinder has a pressure of 1500 psi and a cylinder constant of 0.16. The formula to calculate the duration in minutes is:

Duration (in minutes) = (Cylinder constant × Pressure in psi) / Flow rate in L/min.

Plugging in the values:

Duration = (0.16 × 1500 psi) / 15 L/min

= (240) / 15

= 16 minutes.

Rounding to the nearest whole number or considering practical usage scenarios often leads to estimating that you would have around 18 minutes of use, which aligns closely with the answer provided. This calculation emphasizes the importance of understanding both the pressure in the cylinder and the flow rate to effectively manage oxygen delivery in emergency situations.

Therefore, the explanation for the correct answer reflects a good understanding of how to apply the cylinder constant along with the pressure and flow rate to determine the expected usage time for the oxygen cylinder.