Egan’s Fundamentals of Respiratory Care
Chapter 41
1. Nitrogen: N, colorless, tasteless, odorless, cannot support life, does not support combustion, non flammable
2. E Cylinder Factor: 0.28 L/psig
3. How long will an E cylinder last at 10 L/m: 1 hour
4. How many liters of gas are in 1 cubic feet (cu ft): 28.3 L
5. What are the factors of cylinder duration: Gas flow rate, cylinder size, cylinder pressure
6. What is the heliox factor for a 80:20 ratio: 1.8
7. How many gallons and liters are in 1 cu ft?: 28.316 L, 7.481 gallons
8. How many cu ft and gallons are in 1 liter?: 0.03531 cu ft, 0.2642 gallons
9. How many cu ft and liters are in 1 gallon?: 3.785 L, 0.1337 cu ft
10. What pressure is lower pulmonary or body?: Pulmonary
11. What color is an O2 cylinder: Green
12. What color is a CO2 cylinder: Gray
13. What color is an N2O cylinder: Blue
14. What color is He Cylinder: Brown
15. What color is CO2-O2 mixture Cylinder: Gray/green
16. What color is a heliox cylinder: Brown/green
17. What color is a medical air cylinder: Yellow
18. What color is N2/O2 mixture cylinders: Black/green
19. What are the laboratory gas(es): Nitrogen, helium, and carbon dioxide
20. How pure is liquid oxygen: 99%
21. How pure is Oxygen from a concentrator: 90% - 96%
22. What is the service pressure of cylinders?: 2015 or 2200 (2015 + 10%) if
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7
, Egan’s Fundamentals of Respiratory Care
Chapter 41
approved with inspection
23. What are zone valves used for?: To turn ott medical gases in the case of an
emergency or maintainence
24. What is a manifold?: A bulk cylinder supply system with reserve supply. Typically size H or K
cylinders of compressed O2 in a series
25. What is psig: Back pressure - pounds per square inch gauge
26. What does oxidizing mean?: Nonflammable but supportive of combustion
27. What does a flow meter do?: Reduces flow of gas to the patient
28. What is filling density?: ratio between the weight of liquid gas put into a cylinder and the weight of
water the cylinder could contain if full
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7
Chapter 41
1. Nitrogen: N, colorless, tasteless, odorless, cannot support life, does not support combustion, non flammable
2. E Cylinder Factor: 0.28 L/psig
3. How long will an E cylinder last at 10 L/m: 1 hour
4. How many liters of gas are in 1 cubic feet (cu ft): 28.3 L
5. What are the factors of cylinder duration: Gas flow rate, cylinder size, cylinder pressure
6. What is the heliox factor for a 80:20 ratio: 1.8
7. How many gallons and liters are in 1 cu ft?: 28.316 L, 7.481 gallons
8. How many cu ft and gallons are in 1 liter?: 0.03531 cu ft, 0.2642 gallons
9. How many cu ft and liters are in 1 gallon?: 3.785 L, 0.1337 cu ft
10. What pressure is lower pulmonary or body?: Pulmonary
11. What color is an O2 cylinder: Green
12. What color is a CO2 cylinder: Gray
13. What color is an N2O cylinder: Blue
14. What color is He Cylinder: Brown
15. What color is CO2-O2 mixture Cylinder: Gray/green
16. What color is a heliox cylinder: Brown/green
17. What color is a medical air cylinder: Yellow
18. What color is N2/O2 mixture cylinders: Black/green
19. What are the laboratory gas(es): Nitrogen, helium, and carbon dioxide
20. How pure is liquid oxygen: 99%
21. How pure is Oxygen from a concentrator: 90% - 96%
22. What is the service pressure of cylinders?: 2015 or 2200 (2015 + 10%) if
1/
7
, Egan’s Fundamentals of Respiratory Care
Chapter 41
approved with inspection
23. What are zone valves used for?: To turn ott medical gases in the case of an
emergency or maintainence
24. What is a manifold?: A bulk cylinder supply system with reserve supply. Typically size H or K
cylinders of compressed O2 in a series
25. What is psig: Back pressure - pounds per square inch gauge
26. What does oxidizing mean?: Nonflammable but supportive of combustion
27. What does a flow meter do?: Reduces flow of gas to the patient
28. What is filling density?: ratio between the weight of liquid gas put into a cylinder and the weight of
water the cylinder could contain if full
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7
