A full "H" size cylinder is used to provide oxygen to an air-entrainment mask at 6 L/min.If the cylinder is replaced at 500 psig,how long will it last?

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Amount of time left in cylinder = (cylinder pressure * cylinder factor)/flow rate of gas (liters/minute).H cylinder factor = 3.14.Full-size "H" cylinder = 2265 psig.If the cylinder is changed at 500 psi,then 2265 - 500 = 1765 (1765 psi will be used).(3.14 * 1765)/6 L/min = 923.7 minutes/60 = 15 hours (0.39 * 60)= 15 hours 23 minutes.

A Full "H" Size Cylinder Is Used to Provide Oxygen