NFPA 99 Medical Gas EXAM STUDY
GUIDE 2026 COMPLETE QUESTIONS
WITH CORRECT DETAILED ANSWERS
|| 100% GUARANTEED PASS
<RECENT VERSION>
1. Minimal sedation 3.3.66.4 page 22 - ANSWER ✔ A drug induced state
during which patients respond normally to verbal commands although
cognitive functions and coordination may be impaired, ventilatory and
cardiovascular functions are unaffected.
2. Category two space 3.3.136.2 page 24 - ANSWER ✔ Space in which failure
of equipment or system is likely to cause MINOR injury to patient, staff, or
a visitor.
3. Category three space 3.3.136.3 page 24 - ANSWER ✔ Space in which the
failure of equipment or a system is NOT LIKELY to cause injury to patient,
staff, or visitor but can cause discomfort.
4. Risk category 2 3.3.158.2 page 25 - ANSWER ✔ Activities, systems or
equipment who is a failure is likely to cause MINOR injury to patient, staff,
or visitors
5. Risk category three3.3.1 58.3 page 26 - ANSWER ✔ Activities, systems, or
equipment whose failure is NOT LIKELY to cause injury to patient, staff, or
visitors but can cause discomfort.
,6. Primary supply 3.3.171.2 page 26 - ANSWER ✔ The portion of the central
supply system that is default system for the piping system.
7. An existing system that is not in the strict compliance with the provisions of
this code shall be permitted to be continued in use as long as _______ has
determined that such use does not constitute a distinct hazard to life. -
ANSWER ✔ Authority having jurisdiction
8. Cylinder and cryogenic liquid container outlet connections shall be designed
as to render the attachment point _______ when removal of the outlet
connection is attempted - ANSWER ✔ Unusable
9. Cylinders in use and in storage shall be prevented from reaching
temperatures in excess of _____ F° - ANSWER ✔ 125
10.Nitrous oxide and carbon dioxide using cylinders or portable containers shall
be prevented from reaching temperatures lower than ______ F° - ANSWER
✔ 20
11.Which system shall not be permitted to be located in an outdoor enclosure? -
ANSWER ✔ Medical Air Sources
12.Indoor locations for Oxygen, Nitrous Oxide, and mixtures of these gases
shall not communicate with anything except? - ANSWER ✔ Designated
storage area
13.Locations for Central supply systems shall have _______ devices protected
from physical damage. - ANSWER ✔ Electrical
,14.Outdoor locations surrounded by impermeable walls, except fire barrier
walls, shall have protected ventilation openings at the _______ of each wall
to allow free circulation of air within the enclosure. - ANSWER ✔ Base
15.All positive pressure supply systems shall be provided with duplex line
pressure regulators piped in _______. - ANSWER ✔ Parallel
16.All pressure relief valves shall be made of brass, bronze or _______. -
ANSWER ✔ Stainless steel
17.Central supply systems for positive pressure gases shall have one or more
relief valves, the valves shall have a relief setting that is _____% above
normal operating pressure. - ANSWER ✔ 50
18.When vented to the outside, relief valve vent lines shall be labeled in which
way? - ANSWER ✔ Any manner that will distinguish them from the
medical gas pipeline
19.An auxiliary source connection shall consist of - ANSWER ✔ Visual
pressure indicator
20.In central supply systems using gas or liquid cylinders, each header shall
have a ______ to prevent debris from entering the manifold controls. -
ANSWER ✔ Filter
21.Manifolds for gas cylinders shall consist of two equal headers, each header
with enough cylinders for an average days supply, not not fewer than
______ connections. - ANSWER ✔ 2
, 22.Manifolds for gas cylinders shall have a _____ signal that visibly indicates
the operating status of the equipment and shall activate an indicator at all
master alarm panels when or just before changeover from one header to the
other takes place. - ANSWER ✔ Local
23.When multiple buildings are served from a single cryogenic liquid oxygen
source, it is required to place the emergency oxygen supply connection in
______. - ANSWER ✔ Each building served
24.The minimum clearance around EOSC for a temporary source of supply is
_______ ft. - ANSWER ✔ 3
25.An ______ emergency reserve system can be substituted for the EOSC. -
ANSWER ✔ In building
26.What is the standing pressure test duration and pressure for positive pressure
medical gas piping? - ANSWER ✔ 24 hours at 20% above normal operating
pressure.
27.What is a requirement for the protection of oxygen cylinders? - ANSWER ✔
They must be protected from abnormal mechanical shock.
28.Which system shall not be permitted to be located in an outdoor enclosure? -
ANSWER ✔ Bulk cryogenic liquid systems.
29.What is the instrument air quality requirement regarding dew point? -
ANSWER ✔ It shall be dry to a dew point of -30°F.
GUIDE 2026 COMPLETE QUESTIONS
WITH CORRECT DETAILED ANSWERS
|| 100% GUARANTEED PASS
<RECENT VERSION>
1. Minimal sedation 3.3.66.4 page 22 - ANSWER ✔ A drug induced state
during which patients respond normally to verbal commands although
cognitive functions and coordination may be impaired, ventilatory and
cardiovascular functions are unaffected.
2. Category two space 3.3.136.2 page 24 - ANSWER ✔ Space in which failure
of equipment or system is likely to cause MINOR injury to patient, staff, or
a visitor.
3. Category three space 3.3.136.3 page 24 - ANSWER ✔ Space in which the
failure of equipment or a system is NOT LIKELY to cause injury to patient,
staff, or visitor but can cause discomfort.
4. Risk category 2 3.3.158.2 page 25 - ANSWER ✔ Activities, systems or
equipment who is a failure is likely to cause MINOR injury to patient, staff,
or visitors
5. Risk category three3.3.1 58.3 page 26 - ANSWER ✔ Activities, systems, or
equipment whose failure is NOT LIKELY to cause injury to patient, staff, or
visitors but can cause discomfort.
,6. Primary supply 3.3.171.2 page 26 - ANSWER ✔ The portion of the central
supply system that is default system for the piping system.
7. An existing system that is not in the strict compliance with the provisions of
this code shall be permitted to be continued in use as long as _______ has
determined that such use does not constitute a distinct hazard to life. -
ANSWER ✔ Authority having jurisdiction
8. Cylinder and cryogenic liquid container outlet connections shall be designed
as to render the attachment point _______ when removal of the outlet
connection is attempted - ANSWER ✔ Unusable
9. Cylinders in use and in storage shall be prevented from reaching
temperatures in excess of _____ F° - ANSWER ✔ 125
10.Nitrous oxide and carbon dioxide using cylinders or portable containers shall
be prevented from reaching temperatures lower than ______ F° - ANSWER
✔ 20
11.Which system shall not be permitted to be located in an outdoor enclosure? -
ANSWER ✔ Medical Air Sources
12.Indoor locations for Oxygen, Nitrous Oxide, and mixtures of these gases
shall not communicate with anything except? - ANSWER ✔ Designated
storage area
13.Locations for Central supply systems shall have _______ devices protected
from physical damage. - ANSWER ✔ Electrical
,14.Outdoor locations surrounded by impermeable walls, except fire barrier
walls, shall have protected ventilation openings at the _______ of each wall
to allow free circulation of air within the enclosure. - ANSWER ✔ Base
15.All positive pressure supply systems shall be provided with duplex line
pressure regulators piped in _______. - ANSWER ✔ Parallel
16.All pressure relief valves shall be made of brass, bronze or _______. -
ANSWER ✔ Stainless steel
17.Central supply systems for positive pressure gases shall have one or more
relief valves, the valves shall have a relief setting that is _____% above
normal operating pressure. - ANSWER ✔ 50
18.When vented to the outside, relief valve vent lines shall be labeled in which
way? - ANSWER ✔ Any manner that will distinguish them from the
medical gas pipeline
19.An auxiliary source connection shall consist of - ANSWER ✔ Visual
pressure indicator
20.In central supply systems using gas or liquid cylinders, each header shall
have a ______ to prevent debris from entering the manifold controls. -
ANSWER ✔ Filter
21.Manifolds for gas cylinders shall consist of two equal headers, each header
with enough cylinders for an average days supply, not not fewer than
______ connections. - ANSWER ✔ 2
, 22.Manifolds for gas cylinders shall have a _____ signal that visibly indicates
the operating status of the equipment and shall activate an indicator at all
master alarm panels when or just before changeover from one header to the
other takes place. - ANSWER ✔ Local
23.When multiple buildings are served from a single cryogenic liquid oxygen
source, it is required to place the emergency oxygen supply connection in
______. - ANSWER ✔ Each building served
24.The minimum clearance around EOSC for a temporary source of supply is
_______ ft. - ANSWER ✔ 3
25.An ______ emergency reserve system can be substituted for the EOSC. -
ANSWER ✔ In building
26.What is the standing pressure test duration and pressure for positive pressure
medical gas piping? - ANSWER ✔ 24 hours at 20% above normal operating
pressure.
27.What is a requirement for the protection of oxygen cylinders? - ANSWER ✔
They must be protected from abnormal mechanical shock.
28.Which system shall not be permitted to be located in an outdoor enclosure? -
ANSWER ✔ Bulk cryogenic liquid systems.
29.What is the instrument air quality requirement regarding dew point? -
ANSWER ✔ It shall be dry to a dew point of -30°F.
