Anesthesia Technician Practice Exam

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Given an O2 tank with a pressure of 1000 psig being used at 3 L/min, how long will the tank last until exhaustion?

90 minutes
100 minutes
110 minutes
120 minutes

The correct answer is: 110 minutes

To determine how long the O2 tank will last, we need to first understand the tank's capacity and how that correlates with its use rate. An oxygen tank typically holds oxygen at a pressure of 2000 psig when full, and there's a standard formula to calculate the duration of the tank based on its capacity, flow rate, and pressure. The duration can be calculated using the formula: Duration (minutes) = (Pressure in psig * tank factor) / Flow rate (L/min) In this situation, we're using an oxygen tank with a pressure of 1000 psig and a flow rate of 3 L/min. The tank factor for an oxygen tank is commonly taken to be around 0.16 (which represents how many liters are contained per one psig of pressure for a full tank). Using this setup: 1. Convert the pressure to find the volume of oxygen available: Volume = 1000 psig * 0.16 (tank factor) = 160 liters of oxygen available. 2. Next, calculate how long the tank will last by dividing the total volume by the flow rate: Duration = 160 liters / 3 L/min = approximately 53.33 minutes. This