AEMCA Practice Exam 2026 - Free Practice Questions and Study Guide for Advanced Emergency Medical Care Assistant Certification.

To determine how long you can keep a patient with an M tank at 600 psi flowing at 8 L/min, it's essential first to understand the capacity of an M tank and how to calculate the flow time.

An M tank typically contains about 3,000 liters of oxygen at full pressure. When the tank is at 600 psi, it can be assumed that it holds a proportionate volume of oxygen compared to full capacity, since the pressure is being reduced. The flow rate specified is 8 liters per minute.

First, calculate how much oxygen remains in the tank when it is at 600 psi. You can find the approximate amount remaining by taking the ratio of the current pressure to the full pressure:

600 psi / 3000 psi = 0.2

Next, multiply this ratio by the total capacity of the tank:

0.2 * 3000 L = 600 L of oxygen remaining at 600 psi.

Now, to find out how long this will last at a flow rate of 8 L/min, divide the total volume of oxygen by the flow rate:

600 L / 8 L/min = 75 minutes.

However, since we are calculating how long it can sustain a patient before needing to reach