MEDICAL GAS 6010 INSTALLERS
PRACTICE TEST 2026/2027
QUESTIONS AND ANSWERS
(GRADED A+)
The master alarm system shall activate when the main line of the medical-surgical
vacuum system drops to or below _ in. HgV? A) 10 B) 12 C) 30 D) 32 - ANSWER-C)
12
A signal from each local alarm system shall be connected to the _ alarm panels to
indicate that a problem is present with the source equipment? A) area B) fire C)
master D) warning - ANSWER-C) master
The medical air dew point high alarm from each compressor site will indicate at the
master alarm panels when the line pressure dew point is greater that _ *F? A) +22 B)
+32 C) +35 D) +44 - ANSWER-C) +35
The instrument air dew point high alarm from each compressor site will indicate at
the master alarm panels when the line pressure dew point is greater than _ *F? A) -
22 B) -32 C) -35 D) -44 - ANSWER-A) -22
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 - 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 - 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 - 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 -
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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - ANSWER-D)
visual pressure indicator
The master alarm system shall activate when the main line of the medical-surgical
vacuum system drops to or below _ in. HgV? A) 10 B) 12 C) 30 D) 32 - ANSWER-C)
12
A signal from each local alarm system shall be connected to the _ alarm panels to
indicate that a problem is present with the source equipment? A) area B) fire C)
master D) warning - ANSWER-C) master
The medical air dew point high alarm from each compressor site will indicate at the
master alarm panels when the line pressure dew point is greater that _ *F? A) +22 B)
+32 C) +35 D) +44 - ANSWER-C) +35
The instrument air dew point high alarm from each compressor site will indicate at
the master alarm panels when the line pressure dew point is greater than _ *F? A) -
22 B) -32 C) -35 D) -44 - ANSWER-A) -22
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 - 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 - 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 - 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 - 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 - ANSWER-B) 3
A(n) _ emergency reserve system can be substituted for the EOSC? A) auxiliary B)
backup C) in-building D) micro-bulk - 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 - 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 - 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 - 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 - ANSWER-B) backflow
Reciprocating compressors that employ the use of oil can be used for medical air as
long as the oil-containing section is separated from the compression chamber by at
least _ seals creating an area open to the atmosphere? A) 2 B) 3 C) 4 D) 5 -
ANSWER-A) 2
When liquid ring compressors are being used to service water and seal water shall
be treated to control waterborne pathogens and chlorine (from _) from entering the
medical air? A) deionization B) hyperchlorination C) hypochlorination D) ionization -
ANSWER-C) hypochlorination
Aftercoolers shall be provided with individual _ ? A) condensate traps B) flexible
connectors C) pressure indicators D) temperature indicators - ANSWER-A)
condensate traps
PRACTICE TEST 2026/2027
QUESTIONS AND ANSWERS
(GRADED A+)
The master alarm system shall activate when the main line of the medical-surgical
vacuum system drops to or below _ in. HgV? A) 10 B) 12 C) 30 D) 32 - ANSWER-C)
12
A signal from each local alarm system shall be connected to the _ alarm panels to
indicate that a problem is present with the source equipment? A) area B) fire C)
master D) warning - ANSWER-C) master
The medical air dew point high alarm from each compressor site will indicate at the
master alarm panels when the line pressure dew point is greater that _ *F? A) +22 B)
+32 C) +35 D) +44 - ANSWER-C) +35
The instrument air dew point high alarm from each compressor site will indicate at
the master alarm panels when the line pressure dew point is greater than _ *F? A) -
22 B) -32 C) -35 D) -44 - ANSWER-A) -22
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 - 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 - 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 - 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 -
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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - ANSWER-D)
visual pressure indicator
The master alarm system shall activate when the main line of the medical-surgical
vacuum system drops to or below _ in. HgV? A) 10 B) 12 C) 30 D) 32 - ANSWER-C)
12
A signal from each local alarm system shall be connected to the _ alarm panels to
indicate that a problem is present with the source equipment? A) area B) fire C)
master D) warning - ANSWER-C) master
The medical air dew point high alarm from each compressor site will indicate at the
master alarm panels when the line pressure dew point is greater that _ *F? A) +22 B)
+32 C) +35 D) +44 - ANSWER-C) +35
The instrument air dew point high alarm from each compressor site will indicate at
the master alarm panels when the line pressure dew point is greater than _ *F? A) -
22 B) -32 C) -35 D) -44 - ANSWER-A) -22
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 - 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 - 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 - 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 - 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 - ANSWER-B) 3
A(n) _ emergency reserve system can be substituted for the EOSC? A) auxiliary B)
backup C) in-building D) micro-bulk - 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 - 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 - 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 - 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 - ANSWER-B) backflow
Reciprocating compressors that employ the use of oil can be used for medical air as
long as the oil-containing section is separated from the compression chamber by at
least _ seals creating an area open to the atmosphere? A) 2 B) 3 C) 4 D) 5 -
ANSWER-A) 2
When liquid ring compressors are being used to service water and seal water shall
be treated to control waterborne pathogens and chlorine (from _) from entering the
medical air? A) deionization B) hyperchlorination C) hypochlorination D) ionization -
ANSWER-C) hypochlorination
Aftercoolers shall be provided with individual _ ? A) condensate traps B) flexible
connectors C) pressure indicators D) temperature indicators - ANSWER-A)
condensate traps
