AEMCA Practice Exam

To determine how long a M tank will last at a flow rate of 4 L/min, we first need to know the capacity of an M tank. An M tank contains approximately 3,500 liters of oxygen. By using the flow rate of 4 L/min, we can calculate the duration of the tank's supply of oxygen. The formula to find the time in minutes that the tank will last is: Time (minutes) = Capacity of the tank (liters) / Flow rate (L/min) Applying the numbers: Time = 3,500 L / 4 L/min = 875 minutes To convert minutes into hours and minutes, we divide by 60: 875 minutes ÷ 60 minutes/hour = 14 hours and 35 minutes. This result clearly indicates that there seems to be a discrepancy, as none of the choices match this duration. Assuming the values presented in the question are consistent, if the total tank volume or the flow rate were different, we can substitute those values into this formula accordingly. However, in the context of the original question and the answer chosen as option C (1 hour and 17 minutes), this could be indicative of a different assumption or calculation based on specific parameters adjusting either