NFPA 99 Worksheet 3

Medical Air Central Supply Systems shall be required to _____________.

• meet the requirements of medical air USP

• have no detectable liquid hydrocarbons

• have less than 25 ppm gaseous hydrocarbons

• All of the above

Medical air sources shall be used only for ______________.

• human respiratory applications

• air-operating devices

• instrument air

• All of the above

Medical air compressor systems shall have a (n) _____________ means to prevent backflow through all off-cycle compressors.

• manual

• automatic

• semi-automatic

• all of the above

Medical air compressors shall have a pressure relief valve set at ______% above line pressure.

• 20

• 30

• 40

• 50

Liquid ring and permanently sealed bearing compressors shall separate the oil-containing section from the compression chamber by at least two seals.

• True

• False

Aftercoolers, where required, shall be provided with individual _________.

• Shutoff valves

• Flexible connectors

• Condensate traps

• Pressure indicator

Receivers for medical air shall be equipped with _____________.

• pressure relief valves

• automatic and manual drains

• sight glass

• all of the above

Medical air filters shall be located immediately upstream of the __________.

• after coolers

• receiver

• pressure indicator

• final line regulator

Medical air filters shall be sized for 100% of the system peak calculated demand and be rated for a minimum of ______ efficiency at _______ micron or greater.

• 95% @ .5

• 98% @ 1

• 100% @ .1

• None of the above

Medical air compressors that are designed to separate the oil-containing section from the compression chamber shall be provided with a coalescing filter with ____________.

• shutoff valve

• pressure indicator

• element change indicator

• all of the above