A "G" size cylinder with 2000 psig is used for 6 hours at 5 L/min. How much gas was used dur-ing this time?
a. 2000 psig c. 573 psig
b. 750 psig d. 107 psig
ANS: B
Amount of time left in cylinder = (cylinder pressure ? cylinder factor)/flow rate of gas (li-ters/minute). G factor = 2.41. Time to use 2000 psig = (2000 ? 2.42)/5 = 964 minutes/60 = 16 hours. 2000 psig /16 hours = X psig/6 hours. X = 750 psig will be used in 6 hours at 5 L/min.
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