Your patrol director has asked you to check the oxygen tanks and let her know how long they will last at an accident. To calculate this information you would use which of the following formulas?
a. (Gauge pressure in psi minus safe residual pressure) times cylinder size constant divided by flow rate in LPM
b. (Flow rate in LPM divided by cylinder size) times gauge pressure
c. (Gauge pressure divided by flow rate) minus safe residual pressure
d. (Cylinder size minus safe residual pressure in psi) times flow rate in LPM
Answer: a
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