AEMCA Practice Exam

If a M tank is used at a flow rate of 4 L/min on a nasal cannula, how long will it last?

1. 1 hour and 5 minutes

2. 1 hour and 10 minutes

3. 1 hour and 17 minutes

4. 1 hour and 30 minutes

The correct answer is: 1 hour and 17 minutes

To determine how long a "M tank" will last when used at a flow rate of 4 L/min, it is important to first understand the capacity of an M tank (also known as a medium tank or tank E). An M tank typically contains about 3,000 liters of oxygen. To find the duration the tank will last when delivering oxygen at a flow rate of 4 L/min, we use the following calculation: 1. Calculate the total duration in minutes: Total duration (in minutes) = Total liters in the tank / Flow rate in L/min Total duration = 3,000 L / 4 L/min = 750 minutes. 2. Convert minutes into hours and minutes: 750 minutes is equal to 12 hours and 30 minutes. Therefore, it appears there may have been a misunderstanding or error in interpreting the calculations needed to arrive at 1 hour and 17 minutes as the answer. In fact, based on a standard M tank's volume, the correct calculation reflects that the tank operationally has an extensive duration of use far exceeding the options presented, if less than an hour was the intended value. In this context, the option indicating the tank lasts 1 hour and 17 minutes