MED GAS EXAM STUDY GUIDE
QUESTIONS AND ANSWERS
except for valves in zone valve boxes, all valves shall be located in secured areas such
as locked pipe chases, or be __________. - Answer-latched or locked in operation
position
medical gas Central Supply systems are NOT permitted to be located where? - Answer-
in an unlocked location
fittings, valves, and other components for field-installed positive pressure distribution
systems shall be ________ until prepared for installation. - 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. - Answer-a teaching laboratory
NFPA 99 specifies that the medical gas piping system shall be protected against all
EXCEPT which of the following? - Answer-exposure to liquids
category 1 support gasses carry which of these additional hazards? - 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? - Answer-
1000
an assembly of equipment that holds a capacity of oxygen greater than ____________
is defined as a Bulk Oxygen System - Answer-20,000 ft^3
what does it mean when equipment, material or services are shows as "listed"? -
Answer-they are identified and published by an organization that is acceptable to the
authority having jurisdiction
under which of these conditions shall instrument air reserve header cylinders be
permitted to be stored with the instrument air compressor? - Answer-the only motor-
driven machinery in the rooms is for the instrument air equipment.
which type of copper tube hangers shall be used in a potentially damp location? -
Answer-plastic coated
stainless tubes may be joined by any methods EXCEPT which of the following? -
Answer-Braze
,gas storage for Central Supply Systems required specialized knowledge and
consideration of information in the NFPA 55 for locating, installing and inspection of
which of the following? - Answer-Bulk Gas
all pressure relief valves shall be made of ______ brass, or bronze. - Answer-stainless
steel
the reserve header in a cryogenic liquid cylinder manifold system shall have sufficient
cylinder connections for one average day's supply, but NOT fewer than how many
connections? - Answer-3
all fittings for medical gas work shall be kept separate from other tools and kept free of
grease or oil. If cleaned, only a degreaser such as __________ is permitted. - Answer-
trisodium phosphate or sodium carbonate with potable water
station outlets/inlets shall be identified as to the ________ for the specific gas or
vacuum provided. - Answer-name or chemical symbol
when brazing, joints shall be continuously purges with oil-free, dry nitrogen NF to
prevent the formation of __________ on the inside surfaces of the joint. - Answer-
copper oxide
a bulk cryogenic supply contains parallel-piped duplex line regulators. Which of the
following is a requirement for controls for line pressure? - Answer-a balanced design
in an Emergency Oxygen Supply connection, the check valves are required to be
constructed of which of the following materials? - Answer-Brass or Bronze
which of the following is a requirement for the configuration of a zone valve? - Answer-
placed such that a wall intervenes between the valves and the inlets/outlets they control
which source shall NOT be used to power the venturi of a WAGD system? - Answer-
medical air
which of these is a requirement for each station inlet? - Answer-a primary valve
which type of medical gas has an oxygen concentration > or = to 90% and < or = 96%?
- Answer-oxygen 93 USP
a document in which the main text contains only mandatory provisions. Non-mandatory
provisions are located in the appendix or annex. This is the NFPA 99 definition for which
of the following? - Answer-Standard
A ______________ system is an assembly of equipment such as storage containers,
pressure regulators, pressure relief devices, vaporizers, manifolds, and interconnecting
, piping that has a storage capacity of more than 20,000 cubic feet (at normal
temperature and pressure), including unconnected reserves on hand at the site. -
Answer-bulk oxygen
the vertical pipes connecting the system main line(s) with the branch lines on the
various levels of the facility. This is the definition of which of the following? - Answer-
risers
which category 1 medical gas system includes medical support gas and vacuum
systems, which consist of two sources, including controls, monitors and components? -
Answer-central supply
dental air, used to operate dental devices, consists of which of the following gases? -
Answer-compressed air and nitrogen
dental vacuum and scavenging components of a medical gas system are used for which
of the following purposes? - Answer-expel nitrous oxide and oxygen
who is the individual responsible for reviewing all inspection and testing reports prior to
the use of new, additional, renovated, or temporary medical gas and vacuum
installations? - Answer-responsible facility authority
when storing positive pressure cylinders in an outdoor enclosure, the enclosure shall
meet which of the following requirements? - Answer-be (covered in picture) cylinders
from the soil
a Central supply system with a storage capacity of more than 3200 pounds at normal
temperature and pressure best describes which system? - Answer-bulk nitrous oxide
central supply
where liquid ring compressors are used, air receivers shall be equipped with a high
water level sensor that activates a(n) ____________ alarm indicator. - Answer-local
instrument air systems shall activate the alarm systems when the dew point of system
pressure exceeds how many degrees Fahrenheit? - Answer--22^o degrees
performance qualifications of brazers shall remain in effect indefinitely unless the brazer
does NOT braze with the qualified procedure for longer than what period of time? -
Answer-6 months
pipe labels shall be located at a maximum interval of how many feet? - Answer-20
the installation of medical gas and vacuum systems shall be made by experienced,
qualified and competent installers. Installers shall be certified to the requirements of
which Code/Standard? - Answer-ASSE Standard 6010
QUESTIONS AND ANSWERS
except for valves in zone valve boxes, all valves shall be located in secured areas such
as locked pipe chases, or be __________. - Answer-latched or locked in operation
position
medical gas Central Supply systems are NOT permitted to be located where? - Answer-
in an unlocked location
fittings, valves, and other components for field-installed positive pressure distribution
systems shall be ________ until prepared for installation. - 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. - Answer-a teaching laboratory
NFPA 99 specifies that the medical gas piping system shall be protected against all
EXCEPT which of the following? - Answer-exposure to liquids
category 1 support gasses carry which of these additional hazards? - 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? - Answer-
1000
an assembly of equipment that holds a capacity of oxygen greater than ____________
is defined as a Bulk Oxygen System - Answer-20,000 ft^3
what does it mean when equipment, material or services are shows as "listed"? -
Answer-they are identified and published by an organization that is acceptable to the
authority having jurisdiction
under which of these conditions shall instrument air reserve header cylinders be
permitted to be stored with the instrument air compressor? - Answer-the only motor-
driven machinery in the rooms is for the instrument air equipment.
which type of copper tube hangers shall be used in a potentially damp location? -
Answer-plastic coated
stainless tubes may be joined by any methods EXCEPT which of the following? -
Answer-Braze
,gas storage for Central Supply Systems required specialized knowledge and
consideration of information in the NFPA 55 for locating, installing and inspection of
which of the following? - Answer-Bulk Gas
all pressure relief valves shall be made of ______ brass, or bronze. - Answer-stainless
steel
the reserve header in a cryogenic liquid cylinder manifold system shall have sufficient
cylinder connections for one average day's supply, but NOT fewer than how many
connections? - Answer-3
all fittings for medical gas work shall be kept separate from other tools and kept free of
grease or oil. If cleaned, only a degreaser such as __________ is permitted. - Answer-
trisodium phosphate or sodium carbonate with potable water
station outlets/inlets shall be identified as to the ________ for the specific gas or
vacuum provided. - Answer-name or chemical symbol
when brazing, joints shall be continuously purges with oil-free, dry nitrogen NF to
prevent the formation of __________ on the inside surfaces of the joint. - Answer-
copper oxide
a bulk cryogenic supply contains parallel-piped duplex line regulators. Which of the
following is a requirement for controls for line pressure? - Answer-a balanced design
in an Emergency Oxygen Supply connection, the check valves are required to be
constructed of which of the following materials? - Answer-Brass or Bronze
which of the following is a requirement for the configuration of a zone valve? - Answer-
placed such that a wall intervenes between the valves and the inlets/outlets they control
which source shall NOT be used to power the venturi of a WAGD system? - Answer-
medical air
which of these is a requirement for each station inlet? - Answer-a primary valve
which type of medical gas has an oxygen concentration > or = to 90% and < or = 96%?
- Answer-oxygen 93 USP
a document in which the main text contains only mandatory provisions. Non-mandatory
provisions are located in the appendix or annex. This is the NFPA 99 definition for which
of the following? - Answer-Standard
A ______________ system is an assembly of equipment such as storage containers,
pressure regulators, pressure relief devices, vaporizers, manifolds, and interconnecting
, piping that has a storage capacity of more than 20,000 cubic feet (at normal
temperature and pressure), including unconnected reserves on hand at the site. -
Answer-bulk oxygen
the vertical pipes connecting the system main line(s) with the branch lines on the
various levels of the facility. This is the definition of which of the following? - Answer-
risers
which category 1 medical gas system includes medical support gas and vacuum
systems, which consist of two sources, including controls, monitors and components? -
Answer-central supply
dental air, used to operate dental devices, consists of which of the following gases? -
Answer-compressed air and nitrogen
dental vacuum and scavenging components of a medical gas system are used for which
of the following purposes? - Answer-expel nitrous oxide and oxygen
who is the individual responsible for reviewing all inspection and testing reports prior to
the use of new, additional, renovated, or temporary medical gas and vacuum
installations? - Answer-responsible facility authority
when storing positive pressure cylinders in an outdoor enclosure, the enclosure shall
meet which of the following requirements? - Answer-be (covered in picture) cylinders
from the soil
a Central supply system with a storage capacity of more than 3200 pounds at normal
temperature and pressure best describes which system? - Answer-bulk nitrous oxide
central supply
where liquid ring compressors are used, air receivers shall be equipped with a high
water level sensor that activates a(n) ____________ alarm indicator. - Answer-local
instrument air systems shall activate the alarm systems when the dew point of system
pressure exceeds how many degrees Fahrenheit? - Answer--22^o degrees
performance qualifications of brazers shall remain in effect indefinitely unless the brazer
does NOT braze with the qualified procedure for longer than what period of time? -
Answer-6 months
pipe labels shall be located at a maximum interval of how many feet? - Answer-20
the installation of medical gas and vacuum systems shall be made by experienced,
qualified and competent installers. Installers shall be certified to the requirements of
which Code/Standard? - Answer-ASSE Standard 6010
