MED GAS PRACTICE EXAMINATION
2026 QUESTIONS WITH ANSWERS
GRADED A+
◍ Medical air sources.
Answer: _______shall not be permitted to be located in an outdoor
enclosure.
◍ Station outlets/inlets shall be identified as to the _______ for the specific
gas or vacuum provided.a. Chemical symbolb. Namec. Name or chemical
symbold. Piping type.
Answer: c
◍ When brazing, joints shall be continuously purged with oil-free, dry
nitrogen NF to prevent the formation of _______ on the inside surface of the
joint.a. Copper oxideb. Crystalliationc. Polymeric materialsd. Volatalized
liquids.
Answer: a
◍ 125.
Answer: Cylinders in use and in storage shall be prevented from reaching
temperatures in excess of ______ *F.
◍ ASSE 6000 Annex J provides "Recommended Guidelines for Conducting
Planned Medical gas Systems Shutdown and Temporary Backfeed." Annex
J guidelines do NOT include a list of responsibilites for which types of
worker?a. Installerb. Medical Gas Generalistc. Shutdown Coordinatord.
Verifier.
Answer: b
◍ Stainless steel.
Answer: All pressure relief valves shall be made of brass, bronze, or______.
,◍ Filter.
Answer: In central supply systems using gas or liquid cylinders, each header
shall have a _________ to prevent debris from entering the manifold
controls.
◍ What is the standard gauge pressure (psi) for nitrogen gas service?a. 15-30b.
50-55c. 160-185d. It varies with the system type.
Answer: c
◍ In a facility where medical gas or vacuum systems are present and the
failure of such equipment or system is likely to cause imminent major injury
or death to patients or caregivers, the system shall be designed to meet
which Category of requirements?a. 1b. 2c. 3d. 4.
Answer: a
◍ How many hours must the medical air compressor system be operating
normally before air quality test can be performed?a. 2b. 8c. 12d. 32.
Answer: c
◍ Which of the following fittings is NOT permitted for joining vacuum
distribution pipeline systems?a. Axially swagedb. Memory metalc.
Non-removable push-fitd. Welded.
Answer: c
◍ Each building served.
Answer: When multiple buildings are served from a single cryogenic liquid
oxygen source, it is required to place the emergency supply connection in
_________.
◍ upstream.
Answer: The gas produced by evaporation from the secondary header in a
cryogenic liquid cylinder system shall enter the supply system _________ of
the final line regulator.
◍ Medical air sources shall be used for ______ and human respiration.a.
Air-operating devicesb. Calibration of medical respiratory devicesc.
, Disinfecting tools.d. Instrument air.
Answer: b
◍ balanced.
Answer: Final line pressure regulators, when used for bulk cryogenic
systems, shall be of a(n)_________ design.
◍ In central supply systems using gas cylinders, each header shall have a
__________ valve to prevent backflow and to permit service to the header.a.
Ballb. Bypassc. Checkd. Relief.
Answer: c
◍ 20.
Answer: Nitrous Oxide and Carbon Dioxide using cylinders or portable
containers shall be prevented from reaching temperatures lower
than________*F.
◍ authority having jurisdiction.
Answer: An existing system that is not in strict compliance with the
provisions of this standard 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.
◍ unusable.
Answer: Cylinder and cryogenic liquid container outlet connections shall be
designed as to render the attachment point-_______ when removal of the
outlet connection is attempted.
◍ Which type of connectors shall connect the medical air compressors with
their intake and outlet piping?a. Compression fittingb. Dielectricc.
Flexibled. Insulated.
Answer: c
◍ duplex; parallel.
Answer: Final line pressure regulators shall be provided with _____ line
pressure regulators piped in ______.
, ◍ NFPA 55.
Answer: Bulk cryogenic liquid storage systems shall be in accordance with
_______.
◍ area of open flame.
Answer: Indoor locations for oxygen, nitrous oxide, and mixtures of these
gases shall not communicate with __________ locations.
◍ WAGD networks shall provide a WAGD inlet in all locations where _____
is intended to be administered.a. Medical airb. Nitrogenc. Nitrous oxided.
Oxygen.
Answer: c
◍ 72.
Answer: Louvered openings for natural ventilation shall have a minimum
free area of ________ sq in.
◍ two; two.
Answer: Manifolds for gas cylinders without reserve shall consist of
_______ equal header(s) each with an average day's supply, but not fewer
than _______ connection(s).
◍ local; master.
Answer: Manifolds for gas cylinders shall actuate a(n) ________ signal and
shall activate an indicator at all ________ alarm panels to indicate when or
just before changeover from one header to the other takes place.
◍ In a bulk supply system, when the cryogenic liquid reserve's contents are
reduced to one day's supply, which alarm system(s) shall be activated?a.
Areab. Localc. Masterd. Master and area.
Answer: c
◍ two.
Answer: A variant on the cryogenic liquid container manifold shall be
permitted to have three headers. Such a variant shall have a minimum of
_______ connections required for each of the primary and secondary
headers.
2026 QUESTIONS WITH ANSWERS
GRADED A+
◍ Medical air sources.
Answer: _______shall not be permitted to be located in an outdoor
enclosure.
◍ Station outlets/inlets shall be identified as to the _______ for the specific
gas or vacuum provided.a. Chemical symbolb. Namec. Name or chemical
symbold. Piping type.
Answer: c
◍ When brazing, joints shall be continuously purged with oil-free, dry
nitrogen NF to prevent the formation of _______ on the inside surface of the
joint.a. Copper oxideb. Crystalliationc. Polymeric materialsd. Volatalized
liquids.
Answer: a
◍ 125.
Answer: Cylinders in use and in storage shall be prevented from reaching
temperatures in excess of ______ *F.
◍ ASSE 6000 Annex J provides "Recommended Guidelines for Conducting
Planned Medical gas Systems Shutdown and Temporary Backfeed." Annex
J guidelines do NOT include a list of responsibilites for which types of
worker?a. Installerb. Medical Gas Generalistc. Shutdown Coordinatord.
Verifier.
Answer: b
◍ Stainless steel.
Answer: All pressure relief valves shall be made of brass, bronze, or______.
,◍ Filter.
Answer: In central supply systems using gas or liquid cylinders, each header
shall have a _________ to prevent debris from entering the manifold
controls.
◍ What is the standard gauge pressure (psi) for nitrogen gas service?a. 15-30b.
50-55c. 160-185d. It varies with the system type.
Answer: c
◍ In a facility where medical gas or vacuum systems are present and the
failure of such equipment or system is likely to cause imminent major injury
or death to patients or caregivers, the system shall be designed to meet
which Category of requirements?a. 1b. 2c. 3d. 4.
Answer: a
◍ How many hours must the medical air compressor system be operating
normally before air quality test can be performed?a. 2b. 8c. 12d. 32.
Answer: c
◍ Which of the following fittings is NOT permitted for joining vacuum
distribution pipeline systems?a. Axially swagedb. Memory metalc.
Non-removable push-fitd. Welded.
Answer: c
◍ Each building served.
Answer: When multiple buildings are served from a single cryogenic liquid
oxygen source, it is required to place the emergency supply connection in
_________.
◍ upstream.
Answer: The gas produced by evaporation from the secondary header in a
cryogenic liquid cylinder system shall enter the supply system _________ of
the final line regulator.
◍ Medical air sources shall be used for ______ and human respiration.a.
Air-operating devicesb. Calibration of medical respiratory devicesc.
, Disinfecting tools.d. Instrument air.
Answer: b
◍ balanced.
Answer: Final line pressure regulators, when used for bulk cryogenic
systems, shall be of a(n)_________ design.
◍ In central supply systems using gas cylinders, each header shall have a
__________ valve to prevent backflow and to permit service to the header.a.
Ballb. Bypassc. Checkd. Relief.
Answer: c
◍ 20.
Answer: Nitrous Oxide and Carbon Dioxide using cylinders or portable
containers shall be prevented from reaching temperatures lower
than________*F.
◍ authority having jurisdiction.
Answer: An existing system that is not in strict compliance with the
provisions of this standard 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.
◍ unusable.
Answer: Cylinder and cryogenic liquid container outlet connections shall be
designed as to render the attachment point-_______ when removal of the
outlet connection is attempted.
◍ Which type of connectors shall connect the medical air compressors with
their intake and outlet piping?a. Compression fittingb. Dielectricc.
Flexibled. Insulated.
Answer: c
◍ duplex; parallel.
Answer: Final line pressure regulators shall be provided with _____ line
pressure regulators piped in ______.
, ◍ NFPA 55.
Answer: Bulk cryogenic liquid storage systems shall be in accordance with
_______.
◍ area of open flame.
Answer: Indoor locations for oxygen, nitrous oxide, and mixtures of these
gases shall not communicate with __________ locations.
◍ WAGD networks shall provide a WAGD inlet in all locations where _____
is intended to be administered.a. Medical airb. Nitrogenc. Nitrous oxided.
Oxygen.
Answer: c
◍ 72.
Answer: Louvered openings for natural ventilation shall have a minimum
free area of ________ sq in.
◍ two; two.
Answer: Manifolds for gas cylinders without reserve shall consist of
_______ equal header(s) each with an average day's supply, but not fewer
than _______ connection(s).
◍ local; master.
Answer: Manifolds for gas cylinders shall actuate a(n) ________ signal and
shall activate an indicator at all ________ alarm panels to indicate when or
just before changeover from one header to the other takes place.
◍ In a bulk supply system, when the cryogenic liquid reserve's contents are
reduced to one day's supply, which alarm system(s) shall be activated?a.
Areab. Localc. Masterd. Master and area.
Answer: c
◍ two.
Answer: A variant on the cryogenic liquid container manifold shall be
permitted to have three headers. Such a variant shall have a minimum of
_______ connections required for each of the primary and secondary
headers.
