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48 Cards in this Set
- Front
- Back
- 3rd side (hint)
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6 types of medical gas systems |
Oxygen, nitrous oxide, nitrogen, medical air, cryogenic liquids and medical vacuum systems |
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3 other types of gases that could be in use are |
Carbon dioxide, helium, and ethylene |
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A cross connection in a medi gas piping system could lead to |
Permanent damage to a patients health or death.
Under no circumstances may two systems be interconnected even for testing. |
Never cross connect |
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Medical gas piping will have |
-Cap on end to keep it clean -gas inside -min type L braze process -hard temper tube -soft temper only used underground |
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Minimum size for medical gas |
1/2” |
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Terminal units |
Mounted on the wall -designed to prevent cross connection of medical gases |
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Diss stand for |
Diameter index safety system -to prevent cross connection |
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Piss stands for |
Pin index safety system |
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Recommended height off floor for terminal units is |
5’ 1.5m |
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Medical gas must be free of ____ Or _______ that could combine with the contents, resulting in an explosion or fire. |
Oil or grease |
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Small diameter piping under 1/2” may be joined using _____ Fittings |
Threaded |
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The approved method of joining copper tube and fittings must be joined using ______ |
Silver brazing |
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Flux is permitted when joining _______ metals. |
Dissimilar metals |
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What gas must be present in the piping system while joints are being brazed? |
Nitrogen |
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Maximum horizontal support spacing for 1/2 pipe? |
1.8m 6’ |
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Maximum horizontal support spacing for 3/4” pipe? |
2.4 m 8’ |
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Color coding for oxygen piping is _______ lettering with a ______ Background. |
Green lettering, white background |
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Color coding for nitrogen piping is _____ or _______ lettering on a _______ background. |
White or silver lettering with a black background |
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The approved cleaning materials for degreasing copper tube and fittings are _____ and ______ |
TSP and sodium carbonate |
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What temperature must water be when used for cleaning and rinsing copper tube and fittings? |
Hot |
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What is the minimum test pressure for a medical gas distribution system? |
1030 Kpa (150 psi) |
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What is the maximum test pressure for a medical vacuum system? |
415 kpa (60 psi) |
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What is the minimum test pressure for a nitrogen system designed to operate at 120 psi? |
120 x 1.5= 180 psi |
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During the 24 hour test, is any pressure fluctuation permitted in a medical gas piping system? |
Ambient air |
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To complete a cross connection test on each medical gas piping system individually, the piping is pressurized to 345 Kpa (50 psi) using _________ or _________. |
Oil free dry air or oil free nitrogen |
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Each system must be tested at every _______ |
Terminal unit |
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All medical gas piping systems and medical vacuum systems must be provided with a _______ in case of power failure or low supply in a primary system. |
Back up system |
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The most common compressor is the _______ compressor |
Reciprocating compressor |
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The tank used to store air is called a _________. |
Receiving tank |
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Compressors that have diaphragms are ______ and are used _______________. |
Reciprocating and are used in clean air applications |
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Compressed air may have impurities such as ______, ______ and _______. |
Water, oil and dirt |
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another name for compressed air systems is ________ |
Pneumatic systems |
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What cools the air between stages of a two-stage compressor? |
Pneumatic intercooler |
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Multi-stage compressors usually have _______. |
More than one cylinder |
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When air reaches 100% humidity, it is known as ______ |
Dew point |
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What does relative humidity tell us? |
The water content of air. |
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Where are air dryers installed |
Down stream of the reciever tank |
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Pressure drop in a compressed air system should not exceed _____ psi. |
5 psi |
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What component is an air outlet installed with? |
Dirt pockets for automatic drains |
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Air receiver tanks should be equipped with ________. |
Pressure switch, relief valve, drain, and pressure gauge |
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What are unloaders for compressors used for? |
To decrease pressure in cylinder prior to start up |
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Most compressors are ______ |
Belt driven |
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Materials used for compressed air systems are generally _________________ |
Black iron and sometimes copper type L and type K |
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Horizontal pipes downstream of the receiver should be _________ |
Graded down to drain moisture away from receiver tank |
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Pressure switches usually have a differential Pressure if _________ |
15 psi |
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Pre-filters are installed at the |
Suction inlet |
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Piston type compressors are also know as |
Reciprocating |
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Aftercoolers are installed ________ |
Between the compressor and receiver |
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