Ryanair Initial Practice Exam

What is the duration of the 311L oxygen bottle on low flow at 2 litres per minute?

1. 30 minutes

2. 77 minutes

3. 154 minutes

4. 60 minutes

The correct answer is: 154 minutes

To determine the duration of the 311L oxygen bottle on low flow at 2 litres per minute, we need to calculate how long the oxygen contained in the bottle can last when administered at that specified flow rate. The 311L oxygen bottle refers to the volume of oxygen in the tank, which is 311 litres. If the oxygen is flowing at a rate of 2 litres per minute, we can find the duration by dividing the total volume of the oxygen by the flow rate. To calculate the duration: - Divide the total volume by the flow rate: 311 litres ÷ 2 litres/minute = 155.5 minutes. Given typical rounding and practical considerations in aviation settings, this is usually simplified. Here, it essentially approximates to 154 minutes, which reflects how long the user can continuously receive oxygen at 2 litres per minute before the bottle is empty. This calculation illustrates how critical it is to understand flow rates and the implications for patient care or emergency situations in aviation. Therefore, the answer indicating 154 minutes accurately represents how long the oxygen in the 311L bottle will last when administered at 2 litres per minute.