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?
a. 5 hours c. 10 hours 50 minutes
b. 10 hours 20 minutes d. 15 hours 23 minutes
ANS: D
Amount of time left in cylinder = (cylinder pressure ? cylinder factor)/flow rate of gas (li-ters/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.
You might also like to view...
Which of the following is NOT a way that HIV is transmitted?
A) Sexual contact B) Bodily fluids C) Inhalation D) Mother to child
Oliguria is defined as:
A) urine output of less than 400-500 mL daily. B) urine output of less than 4000-5000 mL daily. C) urine output of less than 100-200 mL daily. D) urine output of less than 1000-2000 mL daily.
The following questions may require the use of an ICD-9-CM code book to complete the sentence. Biopsy of bone marrow is coded to procedure code __________
Fill in the blank(s) with correct word
According to an analysis of sports and society based on Gramsci's ideas, sports are important social phenomena because they are
A. activities that distract attention away from issues of ideology. B. contexts through which ideological messages can be presented to people. C. mechanisms for promoting democracy and the common good in society. D. vehicles for creating disagreement and social conflict in society.