NRCME (DOT) COMPREHENSIVE
STUDY GUIDE 2026 FULL QUESTIONS
AND SOLUTIONS GRADED A+
◍ Which of the following is true of Category 1 medical support gases? A) Can
carry oxidizing gases other than air B) Can be used to power medical
toolsC) Has greater hazards than other piped gasesD) Used only for
respiration.
Answer: B) Can be used to power medical tools
◍ Installers of a category 1 Medical gas pipe distribution system must be
qualified in accordance with ASSE 6010. What is certification requirement
for installers of Category3 Medical gas pipe distribution system?.
Answer: 6010
◍ In a bulk cryogenic system with parallel duplexes line regulators, which of
the following is required for the regulators ?A) balanced design B) check
valves on both sides of the regulator C) hoses cannot contain any polymeric
material D) each regulator shall have flexible hose on the downstream side.
Answer: A) balanced design
◍ Medical gas pipes must be protected from all of the following EXCEPT A)
combustible liquids B) physical damage C) freezing D) corrosion.
Answer: A) combustible liquids
◍ Manufactured assemblies for medical gas with flexible hoses shall use
flexible connections with a burst gauge pressure of how many PSIGA) 200
PSIGB) 800 PSIG C) 1000 PSIGD) 1500 PSIG.
Answer: C) 1000 PSIG
◍ What is not required of flexible joints in a medical gas system used for
vibration control? A) Must withstand 150 PSIG or moreB) Must be provided
, with extensions for brazingC) Must withstand 1000 DegreesD) Must be
cleaned for oxygen service.
Answer: A) Must withstand 150 PSIG or more
◍ When is the initial pressure test conducted by the installer?.
Answer: After blowdown of the distribution piping
◍ What should be done before brazing the cut ends of a tube for medical gas
piping?A) Argon gas purgeB) Cut ends shall be rolled smooth or deburredC)
Extensions should be added for brazingD) Nothing is required before
brazing.
Answer: B) Cut ends shall be rolled smooth or deburred
◍ In those portions of systems intended to handle oxygen pressures greater
than 350 PSI, the interconnecting hose shall not contain ____materials..
Answer: Polymeric
◍ When an EOSC becomes the temporary source, the system will be
monitored by which of the following?A) Personnel on stand by while it is in
useB) Installing additional alarmsC) Provide four connection points for
master alarmsD) provide a local signal at the new source.
Answer: C) Provide four connection points for master alarms
◍ Which of these is an NFPA 99 requirement for the labeling of pipes in a
medical gas system..
Answer: Color coding
◍ In a Category 1 dental and gads piping system, which of the following is a
requirement for labelling pipes?A) color coding B) maximum label width C)
labels shall wrap around the pipeD) labels must be reflective.
Answer: A) color coding
◍ On which side of the zone valve shall a pressure or vacuum sensor be
located in a non-anesthetizing area? A) Station outlet sideB) source sideC)
upstreamD) there is no requirement.
Answer: A) station outlet side
,◍ Which of the following is a requirement for a station inlet?A) must have a
secondary demand check valve B) must have a main vacuum line attached
C) must have a primary valve D) must have an optional in-line valve.
Answer: C) must have a primary valve
◍ Which is required of a zone valve box? A) locate in the room it serves B)
placed so a wall intervenes between the box and the outlets C) locked to
prevent inappropriate accessD) located on the floor above the room it
serves.
Answer: B) placed in the wall intervenes between the box and the outlets
◍ Dental vacuum and scavenging components are used for which purpose ? A)
carry away anesthesia B) suction of bodily fluids c) remove nitros oxide and
oxygen D) remove anesthetic gas only.
Answer: C) remove nitrous oxide and oxygen
◍ When storing positive pressure cylinders in an outdoor enclosure, the
enclosure shall meet which of the following requirements? A) Must be built
with a minimum of two exitsB) Must be well drained and protected from the
soilC) Must have at least 300 square feet for storageD) Must video
monitoring.
Answer: B) Must be well drained and protected from the soil
◍ A central supply system with a storage capacity of more than 3200 pounds
at normal temperature and pressure best describes which of the
following?A) Bulk cryogenic fluid supply systemB) Bulk nitrous oxide
central supplyC)Cylinder systemD)Micro bulk system.
Answer: B) Bulk nitrous oxide central supply
◍ A wireless communication device is employed in a medical gas or vacuum
warning system. Which type of supervision is required for this device?.
Answer: The device shall be supervised such that failure communication
shall initiate an alarm.
◍ Wat sort of treatment is permited before brazing the cut ends of a tube to be
installedin medical gas piping system.
, Answer: The cut ends may be rolled smooth or deburred
◍ Manifolds for gas cylinders shall actuate a ____signal and shall activate an
indicatorat all _____ alarm panels to indicate when, or just before,
changeover from one headerto the other..
Answer: Local signal to master alarm panel
◍ A non-metal flexible connector is being used to connect the manifold to the
gas distribution piping. what id the maximum length for the hose? A) 2.5
Ft.B) No longer than necessaryC) 10Ft
D. Cannot be used.
Answer: B) no longer than necessary
◍ Where liquid ring compressors are used, air receivers shall be equipped with
a highwater level sensor that activates a ______alarm indicator..
Answer: Local
◍ Instrument air systems shall activate the alarm systems when the dew point
at system pressure exceeds how many degrees Fahrenheit.
Answer: -22 degrees
◍ In a non-anesthetizing area, on which side of the zone valve shall the
pressure / vacuum sensor be located?.
Answer: Station Outlet / Inlet
◍ What is the purpose of using an oxygen analyzer in the pipeline purge prior
to brazing?.
Answer: To assure that all ambient air has been removed from the pipeline
◍ Performance qualifications of Braziers shall remain in effect indefinitely
unless the Brazier does not raise with the qualifying procedure for longer
than what time period..
Answer: 6 months
◍ Pipe labels should be located at a maximum interval at how many feet?.
Answer: 20 ft
◍ What is the Standard gauge pressure for nitrogen gas service? A) 15-30
STUDY GUIDE 2026 FULL QUESTIONS
AND SOLUTIONS GRADED A+
◍ Which of the following is true of Category 1 medical support gases? A) Can
carry oxidizing gases other than air B) Can be used to power medical
toolsC) Has greater hazards than other piped gasesD) Used only for
respiration.
Answer: B) Can be used to power medical tools
◍ Installers of a category 1 Medical gas pipe distribution system must be
qualified in accordance with ASSE 6010. What is certification requirement
for installers of Category3 Medical gas pipe distribution system?.
Answer: 6010
◍ In a bulk cryogenic system with parallel duplexes line regulators, which of
the following is required for the regulators ?A) balanced design B) check
valves on both sides of the regulator C) hoses cannot contain any polymeric
material D) each regulator shall have flexible hose on the downstream side.
Answer: A) balanced design
◍ Medical gas pipes must be protected from all of the following EXCEPT A)
combustible liquids B) physical damage C) freezing D) corrosion.
Answer: A) combustible liquids
◍ Manufactured assemblies for medical gas with flexible hoses shall use
flexible connections with a burst gauge pressure of how many PSIGA) 200
PSIGB) 800 PSIG C) 1000 PSIGD) 1500 PSIG.
Answer: C) 1000 PSIG
◍ What is not required of flexible joints in a medical gas system used for
vibration control? A) Must withstand 150 PSIG or moreB) Must be provided
, with extensions for brazingC) Must withstand 1000 DegreesD) Must be
cleaned for oxygen service.
Answer: A) Must withstand 150 PSIG or more
◍ When is the initial pressure test conducted by the installer?.
Answer: After blowdown of the distribution piping
◍ What should be done before brazing the cut ends of a tube for medical gas
piping?A) Argon gas purgeB) Cut ends shall be rolled smooth or deburredC)
Extensions should be added for brazingD) Nothing is required before
brazing.
Answer: B) Cut ends shall be rolled smooth or deburred
◍ In those portions of systems intended to handle oxygen pressures greater
than 350 PSI, the interconnecting hose shall not contain ____materials..
Answer: Polymeric
◍ When an EOSC becomes the temporary source, the system will be
monitored by which of the following?A) Personnel on stand by while it is in
useB) Installing additional alarmsC) Provide four connection points for
master alarmsD) provide a local signal at the new source.
Answer: C) Provide four connection points for master alarms
◍ Which of these is an NFPA 99 requirement for the labeling of pipes in a
medical gas system..
Answer: Color coding
◍ In a Category 1 dental and gads piping system, which of the following is a
requirement for labelling pipes?A) color coding B) maximum label width C)
labels shall wrap around the pipeD) labels must be reflective.
Answer: A) color coding
◍ On which side of the zone valve shall a pressure or vacuum sensor be
located in a non-anesthetizing area? A) Station outlet sideB) source sideC)
upstreamD) there is no requirement.
Answer: A) station outlet side
,◍ Which of the following is a requirement for a station inlet?A) must have a
secondary demand check valve B) must have a main vacuum line attached
C) must have a primary valve D) must have an optional in-line valve.
Answer: C) must have a primary valve
◍ Which is required of a zone valve box? A) locate in the room it serves B)
placed so a wall intervenes between the box and the outlets C) locked to
prevent inappropriate accessD) located on the floor above the room it
serves.
Answer: B) placed in the wall intervenes between the box and the outlets
◍ Dental vacuum and scavenging components are used for which purpose ? A)
carry away anesthesia B) suction of bodily fluids c) remove nitros oxide and
oxygen D) remove anesthetic gas only.
Answer: C) remove nitrous oxide and oxygen
◍ When storing positive pressure cylinders in an outdoor enclosure, the
enclosure shall meet which of the following requirements? A) Must be built
with a minimum of two exitsB) Must be well drained and protected from the
soilC) Must have at least 300 square feet for storageD) Must video
monitoring.
Answer: B) Must be well drained and protected from the soil
◍ A central supply system with a storage capacity of more than 3200 pounds
at normal temperature and pressure best describes which of the
following?A) Bulk cryogenic fluid supply systemB) Bulk nitrous oxide
central supplyC)Cylinder systemD)Micro bulk system.
Answer: B) Bulk nitrous oxide central supply
◍ A wireless communication device is employed in a medical gas or vacuum
warning system. Which type of supervision is required for this device?.
Answer: The device shall be supervised such that failure communication
shall initiate an alarm.
◍ Wat sort of treatment is permited before brazing the cut ends of a tube to be
installedin medical gas piping system.
, Answer: The cut ends may be rolled smooth or deburred
◍ Manifolds for gas cylinders shall actuate a ____signal and shall activate an
indicatorat all _____ alarm panels to indicate when, or just before,
changeover from one headerto the other..
Answer: Local signal to master alarm panel
◍ A non-metal flexible connector is being used to connect the manifold to the
gas distribution piping. what id the maximum length for the hose? A) 2.5
Ft.B) No longer than necessaryC) 10Ft
D. Cannot be used.
Answer: B) no longer than necessary
◍ Where liquid ring compressors are used, air receivers shall be equipped with
a highwater level sensor that activates a ______alarm indicator..
Answer: Local
◍ Instrument air systems shall activate the alarm systems when the dew point
at system pressure exceeds how many degrees Fahrenheit.
Answer: -22 degrees
◍ In a non-anesthetizing area, on which side of the zone valve shall the
pressure / vacuum sensor be located?.
Answer: Station Outlet / Inlet
◍ What is the purpose of using an oxygen analyzer in the pipeline purge prior
to brazing?.
Answer: To assure that all ambient air has been removed from the pipeline
◍ Performance qualifications of Braziers shall remain in effect indefinitely
unless the Brazier does not raise with the qualifying procedure for longer
than what time period..
Answer: 6 months
◍ Pipe labels should be located at a maximum interval at how many feet?.
Answer: 20 ft
◍ What is the Standard gauge pressure for nitrogen gas service? A) 15-30
