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RT 3111 Respiratory Care Exam 1 Study guide questions with answers.
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RT 3111 Respiratory Care Exam 1 Studyguide questions with answers.
E Cylinder ANS -0.28
G cylinder ANS -2.41
Know the filling pressures of oxygen cylinders (fiber-wrapped vs. aluminum/steel) ANS -...2200 psi
fiber wrapped can be filled to 3,000psi , but these tanks are very expensive and are not as common
*for calculation purposes all tanks full have 2200psi.
What is the working pressure of most respiratory care equipment? ANS -Large medical air compressors
must provide high flow (at least 100 L/min) at the standard working pressure of 50 pounds per square
inch gauge (psig) for all equipment in use.
What do the markings on an oxygen cylinder signify? ANS -Cylinder markings
-Date tested
-Inspector's mark
-Passed inspection (+)
-Next inspection in 10yrs (*)
-Construction material (DOT 3AA or DOT 3AL)
-Approved fill P (up to 10% > working P)
-Serial #
-Owner's stamp
H to K ANS -3.14
Know the U.S. tanks colors for various gases ANS -O2 green (or white)
CO2 gray
, Nitrous oxide light blue
Helium brown
CO2 + O2 gray & green
He + O2 brown & green
Air yellow
What 2 pressure relief devices are typically incorporated into cylinder valve construction? ANS -These
relief valves are of three basic designs: frangible disk, fusible plug, and spring-loaded. The frangible
metal disk ruptures at a specific pressure. The fusible plug melts at a specific temperature. The spring-
loaded valve opens and vents gas at a set high pressure. In each case, the activated valve vents gas from
the cylinder and prevents pressure from becoming too high.
These safety relief valves are always located in the cylinder valve stems.
Most small cylinders have ANS -a fusible plug relief valve.
Most large cylinders have ANS -a spring-loaded relief valve.
Describe the process of fractional distillation. How effective is it? ANS -Fractional Distillation
Air is liquefied & cooled
Slowly heated
N & trace gases have lower boiling point
Result is 99.5% pure O2
Physical Separation (Concentrators)
Molecular sieves
Semi-permeable plastic membrane
There are 2 types of Thorpe Tubes
term-1Uncompensated thorpe tube flowmeter & Compensated thorpe tube flowmeter. ANS -
1.Uncompensated thorpe tube flowmeter
Needle valve is proximal to tube
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