Question

An e-cylinder of oxygen has a pressure reading of 1,200 psi prior to transport. How long will this oxygen supply last with O2 flows of 8 L/min?

A) 42 minutes
B) 52 minutes
C) 57 minutes
D) 62 minutes
E) 67 minutes

Answer 1

Without the specific volume and cylinder factor for the given E-cylinder of oxygen, the duration it will last at a flow rate of 8 L/min cannot be determined from the provided information.

Step-by-step explanation:

The question is asking about how long an O2 cylinder with a specific pressure will last when providing oxygen at a flow rate of 8 L/min. To estimate the duration of the oxygen supply, we would typically use the cylinder's pressure and volume, along with the flow rate, to calculate the use time. However, without specific volume information of the cylinder (which is not provided within the question), the correct answer cannot be calculated.

Instead, we could refer to a standard E-cylinder of oxygen, which usually has a volume of about 680 liters (or 24 cubic feet) of gas when full and a working pressure of around 2,000 psi. For example, if we assume we are dealing with an E-cylinder, we can use the following formula for the duration:

Duration (min) = (Pressure (psi) x Cylinder factor) / Flow rate (L/min)

For an E-cylinder, the cylinder factor is approximately 0.28. However, since we do not actually have the cylinder factor or volume for this specific question, this formula cannot be accurately applied to provide an answer.