WS 2 Flashcards
Medical air sources shall be used only for
Human respiratory applications.
Medical air compressor systems shall have a(n) ____ means to prevent back flow through all off-cycle compressors.
Automatic.
Medical air compressor systems shall have a pressure relief valve set at ___ percent above line pressure.
50%
Liquid ring and permanently sealed bearing compressors shall separate the oil-containing section from the compression chamber by at least two seals. True or false?
False.
For liquid ring compressors, service water and seal water shall be treated to control _____.
Waterborne pathogens
Chlorine
And hyper chlorination
Aftercoolers, where required, shall be provided with individual _____.
Condensate traps.
Receivers for medical air shall be equipped with ____.
Relief valves
Automatic manual drains
And sight glass
Medical air filters shall be located immediately upstream of the ____.
Final line regulator.
Medical air filters shall be sized for 100 percent of the system peak calculated demand, and be rated for a minimum of ____ % efficiency at ____ micron or greater.
98%; 1
Medical air compressors shall be sufficient to serve the peak calculated demand, with the largest single compressor out of service. In no case shall there be fewer than ____ compressors.
2
Medical air receivers shall be provided with proper valves that allow the receiver to be ____.
Bypassed.
Dryers, filters, and regulators shall be at least duplexed. Under normal operation, airflow shall be divided by equally through each device. True or false?
False.
Medical air shall be sampled at a ____ NPS valves sample port down stream of the final line pressure regulator.
1/4”
Where medical air piping systems at different operating pressures are required, the piping shall separate after the ____.
Filters.
Medical air compressors shall be provided with a(n) ____ restart function, such that the compressors will be restarted after a power interruption.
Automatic.
The medical air intake shall be located ____ from any vent.
25’
The compressor intakes shall shall be located outdoors above the roof level at a minimum distance of ____ above the ground.
20’
If an air source equal to or better than outside air is available on a continuous eight-hours-per-day, five-days-per-week basis, it shall be permitted to be used for the medical air compressors. True or false?
False.
Where liquid ring compressors with air-water separators are used, when the liquid level is above the design level, a sensor actives a(n) ____ alarm indicator.
Local.
When the backup or lag compressor is running, a(n) _____ alarm shall activate.
Local.
Dew point shall be monitored and shall activate the required alarms when the dew pint at system pressure exceeds ____.
35 F
Carbon monoxide shall activate the required alarms when the CD level exceeds ____ ppm.
10 ppm.
Medical air compressors that are designed to separate the oil-containing section from the compression chamber, shall be provided with a coalescing filter with a/an _____
Element change indicator
Where non-liquid ring compressors are used, the air temperature at the immediate outlet of each compressor cylinder shall be monitored. The temperature setting shall be recommended by the manufacturer. True or false?
True.
