An "H" size oxygen cylinder with 1600 psig has a set flow rate of 3 L/min. It will take _____ hours and _____ minutes to reach 300 psig
a. 17; 24 c. 22; 40
b. 21; 25 d. 27; 54
ANS: C
The same formula as described in the previous question is used here; however, you first have to subtract 300 psig from 1600 psig to get the exact duration for 1300 psig. (1300 ? 3.14)/3 = 1360.7 minutes/60 = approximately 22 hours 40 minutes.
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