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NFPA99 MEDICAL GAS EXAM WITH CORRECT
ACTUAL QUESTIONS AND CORRECTLY WELL DEFINED
ANSWERS LATEST 2025 ALREADY GRADED A+
When brazing, joints shall be continuously purged with
____________,________to prevent the formation of copper oxide in the inside
surfaces of the joint. - (answers)Oil Free, Dry Nitrogen NF
T or F The runouts from horizontal mains branches shall be taken off any angle off
of the center line of pipeline? - (answers)False— no longer part of the NFPA 99C
reference section 5.1.10.10.6 2005,2012
An existing system that is not in strict compliance with the provisions of this code
shall be permitted to be continued in use as long as the ______ has determined
that such use does not constitute a distinct hazard to life. - (answers)Authority
Having Jurisdiction (AHJ)
Indoor location for oxygen, nitrous oxide, and mixtures of these gases shall not
communicate with any of the following except - (answers)designate storage area
5.1.3.3.1.5 (pg27)
An auxiliary source connection shall consist of all of the following EXCEPT
Removable plug or cap
Tee
Valve
Visual pressure indicator - (answers)Visual pressure indicator (5.1.3.5.7 (Pg29))
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When multiple buildings are served from a single cryogenic liquid oxygen source,
it is required to place the emergency oxygen supply connection in___________.
-each building served
-the building closet to the source
-the largest building served
-the main building only - (answers)Each building served (5.1.3.5.15 (2) pg33))
The minimum clearance around the EOSC for a temporary source of supply is
______ft - (answers)3ft 5.1.3.5.15.2(7) pg33
The quality medical air shall comply with all of the following standards EXCEPT
-be filtered to .01 microns
-have less than 25ppm gaseous hydrocarbon
-have no detectable liquid hydrocarbons
-meet the requirement of medical air USP - (answers)Be filter to .01 micron
(5.1.3.6.1 (pg33))
Cylinder and cryogenic liquid container outlet connections shall be designed as to
render the attachment point_________ when removal of the outlet connection is
attempted. - (answers)Unusable (5.1.3.1.5 pg27)
Cylinder in use and in storage shall be prevented from reaching temperatures in
excess of_______. - (answers)125 F
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Nitrous oxides and carbon dioxide or portable container be prevented from
reaching temperatures lower than of_______. - (answers)20F
Which of the following systems shall not be permitted to be located in an
OUTDOOR enclosure? - (answers)Medical Air Sources (5.1.3.3.1.1-pg27)
Location for central supply systems shall have ________ devices protected from
physical damages - (answers)Electrical (5.1.3.3.2(12) pg28)
Outdoor location surrounded by impermeable walls, except fire barrier walls,
shall have protected ventilation openings located at the_________ of each wall to
allow free circulation of air within the enclosure. - (answers)Base (5.1.3.3.3.4(1)
pg28)
All positive pressure supply systems shall be provided with duplex line pressure
regulators piped in________. - (answers)Parallel (5.1.3.5.5.1 pg29)
The medical air intake shall be located a minimum of ________from ventilating
system exhausts, fuel storage vents, combustion vents, plumbing vents, vacuum
and WAGD discharges, or areas that can collect vehicular exhausts or other
noxious fumes. - (answers)25' (5.1.3.6.3.11(B) pg35)
The medical air intake shall be located a minimum of _______above ground level -
(answers)20' (5.1.3.6.3.11 (C) pg35
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The medical air intake shall be located a minimum of __________from any door,
window, or other opening in the building. - (answers)10' (5.1.3.6.3.11 (D) pg35
The end of the intake shall be turned_______ and __________ or otherwise be
protected against the entry of vermin, debris, and material should be non
corroding material. - (answers)Down, Screened (5.1.3.6.3.11 (h) pg35
Medical air source shall only be used for ________. - (answers)Human respiratory
applications and calibration of medical devices
Medical air filters shall be size for 100% of system peak calculated demand and be
rated for a minimum of 98% efficiency at ______micron or greater - (answers)1
(5.1.3.6.3.8 pg34)
It a medical air supply system dryers, filters, and regulators shall be ________ -
(answers)At Least duplexed (5.1.3.6.3.9 (E) pg35)
Vacuum receivers shall be capable of withstanding a gauge vacuum of _____ in of
HgV. - (answers)30 (5.1.3.7.3 (3) pg37)
Medical air SHALL be supplied from cylinders, bulk containers, or medical air
compressor sources, or it shall be reconstituted from________ and
_____________ - (answers)Oxygen USP and Oil-free, nitrogen NF (5.1.3.6.1 (1)
pg33)
NFPA99 MEDICAL GAS EXAM WITH CORRECT
ACTUAL QUESTIONS AND CORRECTLY WELL DEFINED
ANSWERS LATEST 2025 ALREADY GRADED A+
When brazing, joints shall be continuously purged with
____________,________to prevent the formation of copper oxide in the inside
surfaces of the joint. - (answers)Oil Free, Dry Nitrogen NF
T or F The runouts from horizontal mains branches shall be taken off any angle off
of the center line of pipeline? - (answers)False— no longer part of the NFPA 99C
reference section 5.1.10.10.6 2005,2012
An existing system that is not in strict compliance with the provisions of this code
shall be permitted to be continued in use as long as the ______ has determined
that such use does not constitute a distinct hazard to life. - (answers)Authority
Having Jurisdiction (AHJ)
Indoor location for oxygen, nitrous oxide, and mixtures of these gases shall not
communicate with any of the following except - (answers)designate storage area
5.1.3.3.1.5 (pg27)
An auxiliary source connection shall consist of all of the following EXCEPT
Removable plug or cap
Tee
Valve
Visual pressure indicator - (answers)Visual pressure indicator (5.1.3.5.7 (Pg29))
,2|Page
When multiple buildings are served from a single cryogenic liquid oxygen source,
it is required to place the emergency oxygen supply connection in___________.
-each building served
-the building closet to the source
-the largest building served
-the main building only - (answers)Each building served (5.1.3.5.15 (2) pg33))
The minimum clearance around the EOSC for a temporary source of supply is
______ft - (answers)3ft 5.1.3.5.15.2(7) pg33
The quality medical air shall comply with all of the following standards EXCEPT
-be filtered to .01 microns
-have less than 25ppm gaseous hydrocarbon
-have no detectable liquid hydrocarbons
-meet the requirement of medical air USP - (answers)Be filter to .01 micron
(5.1.3.6.1 (pg33))
Cylinder and cryogenic liquid container outlet connections shall be designed as to
render the attachment point_________ when removal of the outlet connection is
attempted. - (answers)Unusable (5.1.3.1.5 pg27)
Cylinder in use and in storage shall be prevented from reaching temperatures in
excess of_______. - (answers)125 F
,3|Page
Nitrous oxides and carbon dioxide or portable container be prevented from
reaching temperatures lower than of_______. - (answers)20F
Which of the following systems shall not be permitted to be located in an
OUTDOOR enclosure? - (answers)Medical Air Sources (5.1.3.3.1.1-pg27)
Location for central supply systems shall have ________ devices protected from
physical damages - (answers)Electrical (5.1.3.3.2(12) pg28)
Outdoor location surrounded by impermeable walls, except fire barrier walls,
shall have protected ventilation openings located at the_________ of each wall to
allow free circulation of air within the enclosure. - (answers)Base (5.1.3.3.3.4(1)
pg28)
All positive pressure supply systems shall be provided with duplex line pressure
regulators piped in________. - (answers)Parallel (5.1.3.5.5.1 pg29)
The medical air intake shall be located a minimum of ________from ventilating
system exhausts, fuel storage vents, combustion vents, plumbing vents, vacuum
and WAGD discharges, or areas that can collect vehicular exhausts or other
noxious fumes. - (answers)25' (5.1.3.6.3.11(B) pg35)
The medical air intake shall be located a minimum of _______above ground level -
(answers)20' (5.1.3.6.3.11 (C) pg35
, 4|Page
The medical air intake shall be located a minimum of __________from any door,
window, or other opening in the building. - (answers)10' (5.1.3.6.3.11 (D) pg35
The end of the intake shall be turned_______ and __________ or otherwise be
protected against the entry of vermin, debris, and material should be non
corroding material. - (answers)Down, Screened (5.1.3.6.3.11 (h) pg35
Medical air source shall only be used for ________. - (answers)Human respiratory
applications and calibration of medical devices
Medical air filters shall be size for 100% of system peak calculated demand and be
rated for a minimum of 98% efficiency at ______micron or greater - (answers)1
(5.1.3.6.3.8 pg34)
It a medical air supply system dryers, filters, and regulators shall be ________ -
(answers)At Least duplexed (5.1.3.6.3.9 (E) pg35)
Vacuum receivers shall be capable of withstanding a gauge vacuum of _____ in of
HgV. - (answers)30 (5.1.3.7.3 (3) pg37)
Medical air SHALL be supplied from cylinders, bulk containers, or medical air
compressor sources, or it shall be reconstituted from________ and
_____________ - (answers)Oxygen USP and Oil-free, nitrogen NF (5.1.3.6.1 (1)
pg33)
