Author Question: A G size oxygen cylinder with 1450 psig is being used at 5 L/min. This cylinder will be empty in ... (Read 71 times)

jCorn1234 · **on:** Jul 16, 2018

A G size oxygen cylinder with 1450 psig is being used at 5 L/min. This cylinder will be empty in approximately _____ hour(s) and _____ minutes.

a. 1; 30 c. 11; 30
b. 2; 39 d. 15; 16

Question 2

An E size cylinder is turned on, and the flowmeter is off. Which of the following is (are) the most likely cause(s) of a hissing sound?

1. A cracked flowmeter
2. Inadequate pressure in the cylinder
3. An obstruction at the regulator outlet
4. A leak in the connection between the yoke and the cylinder opening
a. 2 c. 1 and 3
b. 1 and 2 d. 1 and 4

frre432 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
Amount of time left in cylinder = (cylinder pressure cylinder factor)/flow rate of gas (li-ters/minute). G size cylinder factor = 2.41. Amount of time = (1450 2.41)/5 = 698.9 minutes/60 = 11 hours 39 minutes.

Answer to Question 2

ANS: D
A hissing noise means that there is a leak somewhere in the system. Typically, that will occur between the yoke and the cylinder opening or if there is a crack in the flowmeter. Inadequate pressure or an obstruction would not cause a hissing sound.