WS 4 Flashcards
The quality of instrument air shall be ____.
Filtered to .01 micron,
Freed of liquids,
And feee of hydrocarbon vapors.
The quality of instrument air shall be dry to a dew point of ___.
-40 degrees F.
Instrument air systems shall be permitted to interconnect with medical air systems that have at least two or more compressors. True or false?
False.
Instrument air sources shall produce air at not less than a gauge pressure of ____.
200 psi.
Where instrument air systems are provided with a standby header, the header shall have how many cylinders attached?
One hour of normal operation.
Instrument air intake shall be permitted to be drawn from:
Outside air,
Ducted air,
And equipment room.
Instrument air sources shall be filtered with activated carbon filters and be located upstream or the final line filters. True or false?
True.
Final line filters for instrument air shall be rated for a minimum of ____ efficiency at ____ micron.
98%; .01
Final line filters for instrument air shall be equipped with a continuous visual indicator showing the status of the filter element life. True or false?
True.
What alarm shall the instrument air activate to indicate when or just before the backup compressor (if provided) is in operation?
Local.
Instrument air systems shall activate the alarm systems when the dew point at system pressure exceeds _____.
-22 degrees F
Instrument air sources with standby headers shall activate an alarm at the compressor site, a local signal at the header location and all master panels. True or false?
True.
Instrument air sources with standby headers shall be alarmed to indicate ____.
Reserve in use,
High dew point,
And reserve low.
All valves except zone valve box assemblies shall be ____.
In a secure area,
Locked or latched in their operating position, and
Labeled appropriately.
With the approval of the authority authority having jurisdiction, in what areas shall shutoff valves be permitted to be secured to prevent inappropriate access?
Psychiatric or pediatric.
All positive pressure medical gas valves shall have the following characteristics:
Quarter turn,
Brass or bronze construction, and
Cleaned for oxygen service.
Per NFPA 99 it is acceptable for the installer to purchase ball valves without factory extensions as long as when they install their own extensions they remove the guts of the valve. True or false?
False.
A shutoff valve shall be placed at the immediate connection of each source system to the distribution piping system. What is the name of this valve?
Source.
A shutoff valve shall be provided in the main supply line when the source valve is not accessible from within the building being served. What is the name of this valve?
Main.
The main line valve shall be accessible to other than authorized personnel to facilitate periodic testing. True or false?
False.
Riser valves shall be accessible, unobstructed, and shall not be permitted to be located above ceilings. True or false?
False.
What is the name of the valve that is rehired to be installed on every lateral branch of a medical gas or vacuum system?
Service valve.
Regardless of how many zone valve boxes are installed on a lateral branch of a riser, only one service valve shall be required for each branch. True or false?
False.
Zone valve box assemblies are now permitted to be located in a locked or secured area. True or false?
False.
