Med Gas Exam UPDATED QUESTIONS AND
CORRECT ANSWERS
When is the initial pressure test conducted, by a medical gas installer, on a nitrous oxide
system? - CORRECT ANSWER After blowdown of a distribution piping
In those portions of systems intended to handle oxygen at pressures greater than 350 psi the
interconnecting hose shall NOT contain ________ materials? - CORRECT
ANSWER Polymeric
In a Category 1 Dental and Gas Vacuum Piping system, which of the following is an NFPA
99 requirement for the labeling of pipes? - CORRECT ANSWER Color coding & non-
standard pressure
Which of the following treatments shall be performed before brazing cut ends of a tube to be
installed in a medical gas piping system? - CORRECT ANSWER Cut ends shall be
rolled smooth or deburred
Manifolds for gas cylinders shall actuate a(an) _______ signal and shall activate an indicator
at all _______ alarm panels to indicate when or just before changeover from one header to
the other. - CORRECT ANSWER Local, master
In a non-anesthetizing area, on which side of a zone valve shall the pressure/vacuum sensor
be located? - CORRECT ANSWER Station outlet/inlet
What is the purpose of using an oxygen analyzer during the piping purge prior to brazing? -
CORRECT ANSWER Assure that all ambient air has been removed from the pipeline
A medical gas master or area alarm panel shall be set to actuate a(an) _____ indicator when
the communication with an alarm-initiating device is disconnected. - CORRECT
ANSWER Audible and visual
,When an EOSC becomes the temporary supply source, a facility will monitor the system by
use of which of the following? - CORRECT ANSWER Providing four connection
points to both master alarms
Which of the following conditions must be met where medical gas and vacuum systems are
installed by non-certified personnel? - CORRECT ANSWER installation by anyone
other than 6010 certified personnel is NOT permitted
Which of the following systems shall NOT be permitted to be located in an outdoor
enclosure? - CORRECT ANSWER Medical air compressor supply sources
Metallic flexible joints are being used in the pipeline for vibration control. Which of the
following is NOT required of such joints? - CORRECT ANSWER suitable for service
at 150 psig or above
who shall witness the installer-performed standing vacuum test? - CORRECT
ANSWER the authority having jurisdiction, or its designee
the medical air compressor intake shall be located a minimum of how many feet from any
exhaust or plumbing vents? - CORRECT ANSWER 25 feet
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. - CORRECT
ANSWER upstream
with the approval of the Authority Having Jurisdiction, in which areas shall the zone valves
be permitted to be secured to prevent inappropriate access? - CORRECT
ANSWER pediatric
factory installed inlet tubes on station outlets shall be NOT less than __________with 0.3
inch minimum inside diameter. - CORRECT ANSWER NPS 1/4, 3/8 in. O.D.
, which of these operations would not breach the vacuum system? - CORRECT
ANSWER testing a system component with a leak detector solution
except for valves in zone valve boxes, all valves shall be located in secured areas such as
locked pipe chases, or be __________. - CORRECT ANSWER latched or locked in
operation position
medical gas Central Supply systems are NOT permitted to be located where? - CORRECT
ANSWER in an unlocked location
fittings, valves, and other components for field-installed positive pressure distribution
systems shall be ________ until prepared for installation. - CORRECT
ANSWER delivered sealed, labeled, and kept sealed
vacuum piping for __________ shall be connected separately from the medical surgical
system directly to the receiver tank through its own isolation valve and fluid trap located at
the receiver. - CORRECT ANSWER a teaching laboratory
NFPA 99 specifies that the medical gas piping system shall be protected against all EXCEPT
which of the following? - CORRECT ANSWER exposure to liquids
category 1 support gasses carry which of these additional hazards? - CORRECT
ANSWER higher pressures
manufactured assemblies for medical gas systems employing flexible hose shall use flexible
connectors with a minimum burst gauge pressure of how many psi? - CORRECT
ANSWER 1000
an assembly of equipment that holds a capacity of oxygen greater than ____________ is
defined as a Bulk Oxygen System - CORRECT ANSWER 20,000 ft^3
CORRECT ANSWERS
When is the initial pressure test conducted, by a medical gas installer, on a nitrous oxide
system? - CORRECT ANSWER After blowdown of a distribution piping
In those portions of systems intended to handle oxygen at pressures greater than 350 psi the
interconnecting hose shall NOT contain ________ materials? - CORRECT
ANSWER Polymeric
In a Category 1 Dental and Gas Vacuum Piping system, which of the following is an NFPA
99 requirement for the labeling of pipes? - CORRECT ANSWER Color coding & non-
standard pressure
Which of the following treatments shall be performed before brazing cut ends of a tube to be
installed in a medical gas piping system? - CORRECT ANSWER Cut ends shall be
rolled smooth or deburred
Manifolds for gas cylinders shall actuate a(an) _______ signal and shall activate an indicator
at all _______ alarm panels to indicate when or just before changeover from one header to
the other. - CORRECT ANSWER Local, master
In a non-anesthetizing area, on which side of a zone valve shall the pressure/vacuum sensor
be located? - CORRECT ANSWER Station outlet/inlet
What is the purpose of using an oxygen analyzer during the piping purge prior to brazing? -
CORRECT ANSWER Assure that all ambient air has been removed from the pipeline
A medical gas master or area alarm panel shall be set to actuate a(an) _____ indicator when
the communication with an alarm-initiating device is disconnected. - CORRECT
ANSWER Audible and visual
,When an EOSC becomes the temporary supply source, a facility will monitor the system by
use of which of the following? - CORRECT ANSWER Providing four connection
points to both master alarms
Which of the following conditions must be met where medical gas and vacuum systems are
installed by non-certified personnel? - CORRECT ANSWER installation by anyone
other than 6010 certified personnel is NOT permitted
Which of the following systems shall NOT be permitted to be located in an outdoor
enclosure? - CORRECT ANSWER Medical air compressor supply sources
Metallic flexible joints are being used in the pipeline for vibration control. Which of the
following is NOT required of such joints? - CORRECT ANSWER suitable for service
at 150 psig or above
who shall witness the installer-performed standing vacuum test? - CORRECT
ANSWER the authority having jurisdiction, or its designee
the medical air compressor intake shall be located a minimum of how many feet from any
exhaust or plumbing vents? - CORRECT ANSWER 25 feet
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. - CORRECT
ANSWER upstream
with the approval of the Authority Having Jurisdiction, in which areas shall the zone valves
be permitted to be secured to prevent inappropriate access? - CORRECT
ANSWER pediatric
factory installed inlet tubes on station outlets shall be NOT less than __________with 0.3
inch minimum inside diameter. - CORRECT ANSWER NPS 1/4, 3/8 in. O.D.
, which of these operations would not breach the vacuum system? - CORRECT
ANSWER testing a system component with a leak detector solution
except for valves in zone valve boxes, all valves shall be located in secured areas such as
locked pipe chases, or be __________. - CORRECT ANSWER latched or locked in
operation position
medical gas Central Supply systems are NOT permitted to be located where? - CORRECT
ANSWER in an unlocked location
fittings, valves, and other components for field-installed positive pressure distribution
systems shall be ________ until prepared for installation. - CORRECT
ANSWER delivered sealed, labeled, and kept sealed
vacuum piping for __________ shall be connected separately from the medical surgical
system directly to the receiver tank through its own isolation valve and fluid trap located at
the receiver. - CORRECT ANSWER a teaching laboratory
NFPA 99 specifies that the medical gas piping system shall be protected against all EXCEPT
which of the following? - CORRECT ANSWER exposure to liquids
category 1 support gasses carry which of these additional hazards? - CORRECT
ANSWER higher pressures
manufactured assemblies for medical gas systems employing flexible hose shall use flexible
connectors with a minimum burst gauge pressure of how many psi? - CORRECT
ANSWER 1000
an assembly of equipment that holds a capacity of oxygen greater than ____________ is
defined as a Bulk Oxygen System - CORRECT ANSWER 20,000 ft^3
