Medical Gas 6010 Installers Practice
Test with Correct Answers 2026
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. A) architect B) authority having jurisdiction C) engineer D)
nursing staff - <CORRECT ANSWER >>B) authority having jurisdiction
Cylinder and cryogenic liquid container outlet connections shall be designed as to render the
attachment point _ when removal of the outlet connection is attempted. A) reusable B)
unusable C) unsuitable D) universal - <CORRECT ANSWER >>B) unusable
Cylinders in use and in storage shall be prevented from reaching temperatures in excess of _ *F.
A) 120 B) 125 C) 130 D) 135 - <CORRECT ANSWER >>B) 125
Nitrous oxide and carbon dioxide using cylinders or portable containers shall be prevented from
reaching temperatures lower than _ *F A) 130 B)125 C) 20 D) -20 - <CORRECT ANSWER >>C)20
Which of the following systems shall not be permitted to be located in an outdoor enclosure?
A) bulk cryogenic liquid cylinders B) manifolds for gas cylinders C) manifolds for cryogenic liquid
containers D) medical air sources - <CORRECT ANSWER >>D) medical air sources
Indoor locations for oxygen, nitrous oxide, and mixtures of these gases shall not communicate
with any of the following except _? A) area with open flames B) designated storage area C)
engines D) kitchens - <CORRECT ANSWER >>B) designated storage area
Locations for central supply systems shall have _ devices protected from physical damage? A)
electrical B) pressure indicating C) regulating D) relief - <CORRECT ANSWER >>A) electrical
,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? A) base B) corner) C) middle D) top - <CORRECT ANSWER >>A) base
All positive pressure supply systems shall be provided with duplex line pressure regulators
piped in _? A) circuit B) loop C) parallel D) series - <CORRECT ANSWER >>C) parallel
All pressure relief valves shall be made of brass, bronze, or _? A) carbon steel B) cast iron C)
copper D) stainless steel - <CORRECT ANSWER >>D) stainless steel
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 working operating pressure? A) 30 B)
40 C) 50 D) 60 - <CORRECT ANSWER >>C) 50
When vented to the outside, relief valve vent lines shall be labeled in which way? A) adhesive
markers B) any manner that will distinguish them from the medical gas pipeline C) stenciling D)
stickers - <CORRECT ANSWER >>B) any manner that will distinguish them from the medical gas
pipeline
An auxiliary source connection shall consist of all of the following except? A) removable plug or
cap B) tee C) valve D) visual pressure indicator - <CORRECT ANSWER >>D) visual pressure
indicator
In central supply systems using gas or liquid cylinders, each header shall have a _ to prevent
debris from entering the manifold controls? A) check valve B) filter C) monitor D) relief valve -
<CORRECT ANSWER >>B) filter
Manifolds for gas cylinders shall consist of two equal headers, each with enough cylinders for
an average day's supply, but not fewer than _ connections? A) 5 B) 4 C) 3 D) 2 - <CORRECT
ANSWER >>D) 2
, Manifolds for gas cylinders shall have a(n) _ 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? A) area B) master C) local D) zone -
<CORRECT ANSWER >>C) local
When multiple buildings are served from a single cryogenic liquid oxygen source, it is required
to place the emergency oxygen supply connection in _ ? A) each building served B) the building
closest to the source C) the largest building served D) the main building only - <CORRECT
ANSWER >>A) each building served
The minimum clearance around EOSC for a temporary source of supply is _ ft? A) 2 B) 3 C) 5 D)
6 - <CORRECT ANSWER >>B) 3
A(n) _ emergency reserve system can be substituted for the EOSC? A) auxiliary B) backup C) in-
building D) micro-bulk - <CORRECT ANSWER >>C) in-building
The quality medical air shall comply with all of the following standards except? A) be filtered to
.01 microns B) have less than 25 ppm gaseous hydrocarbons C) have no detectable
hydrocarbons D) meet the requirements of medical air USP - <CORRECT ANSWER >>A) be
filtered to .01 microns
Medical air sources shall only be used for _ ? A) air-operating devices B) human respiratory
applications C) instrument air D) WAGD - <CORRECT ANSWER >>B) human respiratory
applications
Medical air compressor systems shall have a pressure relief valve set at _ percent above line
pressure? A) 20 B) 30 C) 40 D) 50 - <CORRECT ANSWER >>D) 50
Medical air compressor systems shall have an automatic means to prevent _ from all on-cycle
compressors through all off-cycle compressors? A) backfire B) backflow C) back pressure D)
backup - <CORRECT ANSWER >>B) backflow
Test with Correct Answers 2026
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. A) architect B) authority having jurisdiction C) engineer D)
nursing staff - <CORRECT ANSWER >>B) authority having jurisdiction
Cylinder and cryogenic liquid container outlet connections shall be designed as to render the
attachment point _ when removal of the outlet connection is attempted. A) reusable B)
unusable C) unsuitable D) universal - <CORRECT ANSWER >>B) unusable
Cylinders in use and in storage shall be prevented from reaching temperatures in excess of _ *F.
A) 120 B) 125 C) 130 D) 135 - <CORRECT ANSWER >>B) 125
Nitrous oxide and carbon dioxide using cylinders or portable containers shall be prevented from
reaching temperatures lower than _ *F A) 130 B)125 C) 20 D) -20 - <CORRECT ANSWER >>C)20
Which of the following systems shall not be permitted to be located in an outdoor enclosure?
A) bulk cryogenic liquid cylinders B) manifolds for gas cylinders C) manifolds for cryogenic liquid
containers D) medical air sources - <CORRECT ANSWER >>D) medical air sources
Indoor locations for oxygen, nitrous oxide, and mixtures of these gases shall not communicate
with any of the following except _? A) area with open flames B) designated storage area C)
engines D) kitchens - <CORRECT ANSWER >>B) designated storage area
Locations for central supply systems shall have _ devices protected from physical damage? A)
electrical B) pressure indicating C) regulating D) relief - <CORRECT ANSWER >>A) electrical
,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? A) base B) corner) C) middle D) top - <CORRECT ANSWER >>A) base
All positive pressure supply systems shall be provided with duplex line pressure regulators
piped in _? A) circuit B) loop C) parallel D) series - <CORRECT ANSWER >>C) parallel
All pressure relief valves shall be made of brass, bronze, or _? A) carbon steel B) cast iron C)
copper D) stainless steel - <CORRECT ANSWER >>D) stainless steel
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 working operating pressure? A) 30 B)
40 C) 50 D) 60 - <CORRECT ANSWER >>C) 50
When vented to the outside, relief valve vent lines shall be labeled in which way? A) adhesive
markers B) any manner that will distinguish them from the medical gas pipeline C) stenciling D)
stickers - <CORRECT ANSWER >>B) any manner that will distinguish them from the medical gas
pipeline
An auxiliary source connection shall consist of all of the following except? A) removable plug or
cap B) tee C) valve D) visual pressure indicator - <CORRECT ANSWER >>D) visual pressure
indicator
In central supply systems using gas or liquid cylinders, each header shall have a _ to prevent
debris from entering the manifold controls? A) check valve B) filter C) monitor D) relief valve -
<CORRECT ANSWER >>B) filter
Manifolds for gas cylinders shall consist of two equal headers, each with enough cylinders for
an average day's supply, but not fewer than _ connections? A) 5 B) 4 C) 3 D) 2 - <CORRECT
ANSWER >>D) 2
, Manifolds for gas cylinders shall have a(n) _ 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? A) area B) master C) local D) zone -
<CORRECT ANSWER >>C) local
When multiple buildings are served from a single cryogenic liquid oxygen source, it is required
to place the emergency oxygen supply connection in _ ? A) each building served B) the building
closest to the source C) the largest building served D) the main building only - <CORRECT
ANSWER >>A) each building served
The minimum clearance around EOSC for a temporary source of supply is _ ft? A) 2 B) 3 C) 5 D)
6 - <CORRECT ANSWER >>B) 3
A(n) _ emergency reserve system can be substituted for the EOSC? A) auxiliary B) backup C) in-
building D) micro-bulk - <CORRECT ANSWER >>C) in-building
The quality medical air shall comply with all of the following standards except? A) be filtered to
.01 microns B) have less than 25 ppm gaseous hydrocarbons C) have no detectable
hydrocarbons D) meet the requirements of medical air USP - <CORRECT ANSWER >>A) be
filtered to .01 microns
Medical air sources shall only be used for _ ? A) air-operating devices B) human respiratory
applications C) instrument air D) WAGD - <CORRECT ANSWER >>B) human respiratory
applications
Medical air compressor systems shall have a pressure relief valve set at _ percent above line
pressure? A) 20 B) 30 C) 40 D) 50 - <CORRECT ANSWER >>D) 50
Medical air compressor systems shall have an automatic means to prevent _ from all on-cycle
compressors through all off-cycle compressors? A) backfire B) backflow C) back pressure D)
backup - <CORRECT ANSWER >>B) backflow
