NRCME (DOT) ACTUAL EXAM PAPER
2026 QUESTIONS WITH ANSWERS
GRADED A+
◍ What is best described as an engineered assembly of components that
operate to raise the concentration of oxygen, providing an oxygen
enriched-atmosphere to a patient?.
Answer: Oxygen Concentrator Unit
◍ As referenced in the NFPA 99, a pressure of 216 psi in a system would be
defined as what kind of pressure?.
Answer: high pressure
◍ what is described as an assembly of equipment for supplying compressed
gas that terminates where the gas, at service pressure, first enter the
mainline? The source gas is stored as a compressed gas or cryogenic fluid in
storage, containers that are either stationary or movable and include
unconnected reserves on hand at the site..
Answer: Bulk system
◍ A __________ system is a assembly of equipment such as a storage
container, 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
reserve on hand at the site..
Answer: Bulk oxygen
◍ An assembly of equipment that holds a capacity of oxygen greater than
__________ is defined as a Bulk Oxygen System..
Answer: 20,000 ft^3
◍ A continuous tape or marker shall be placed immediately above the buried
, pipeline enclosure and shall be identified by ___..
Answer: specific name
◍ Dental air is a compressed gas intended to be used to operate dental devices,
and is supplied by what following sources?.
Answer: - compressed air systems- pressurized cylinders of air- nitrogen
◍ Dental procedures often require the use of nitrous oxide. What method
provides drainage, aspiration and suction to remove body fluids from the
patient during dental treatment..
Answer: Dental/ Surgical Vacuum
◍ the ____________ shall furnish documentation certifying that tubes, valves,
fittings and other piping components have been ___________ by the
manufacturer or by a supplier or agency other than the manufacturer to
cga-4.1.
Answer: Installer; cleaned for oxygen service
◍ The NFPA that all medical gas and vacuum installers, responsible for the
installation of medical gas and vacuum piping, all apperturant piping
support pumps and compressor source systems, and apperturant piping
support systems, not including permanently installed bulk source systems,
shall be certified in accordance with __________..
Answer: ASSE 6010
◍ At a minimum, how many feet shall CMT be identified as suitable for
oxygen by the manufacturer?.
Answer: 3 feet
◍ Brazed joints are permitted to be repaired, except no joint shall be heated
more than?.
Answer: twice
◍ Brazed joints shall be made using a brazing alloy that exhibits a melting
temperature in excess of ___ degrees F to retain the integrity of the piping
system in the event of fire..
Answer: 1000
,◍ What condition must be met where medical gas and vacuum systems are
installed by non-certified personnel?.
Answer: Installation by anyone other than 6010 certified personnel is NOT
permitted.
◍ Brazing procedures and brazer performance for the installation of medical
gas and vacuum piping shall be qualified in accordance with ___..
Answer: ASME section 9 (IX)
◍ CMT shall have a flame spread index of ___ or less and a smoke developed
index of 50 or less as determined by ASTM E84..
Answer: 25
◍ Prior to any installation work on Category 1 distribution piping system, the
installer of medical gas and vacuum piping shall provide maintain
documentation on the jobsite __________..
Answer: for the qualifications of brazing procedures and individual braziers
◍ CMT systems shall be installed by ___ qualified installers using the CMT
manufacturer's instructions..
Answer: ASSE 6010
◍ What type of copper tube hangers shall be used in a potentially damp
location where the hanger would be in contact with the copper tube?.
Answer: electrically insulated with materials that will not absorb moisture
◍ Copper that is 3-1/8" or larger in diameter, with 185 PSI or greater is
required to be what type of copper?.
Answer: Type K
◍ Flex hose and connectors, both metallic and non-metallic, shall be no longer
than necessary and shall have a minimum burst pressure of ___..
Answer: 1000 PSI
◍ in a category 1 health care facility, what is the maximum length allowed for
metallic and non-metallic hoses and flexible connectors for installation in a
medical gas vacuum piping system?.
, Answer: They shall be no longer than necessary
◍ For medical-surgical vacuum systems, piping shall be hard-drawn, seamless
copper tube type ___..
Answer: ASTM B88, ASTM B819, and ASTM B280
◍ Metallic flexible joints are being used in the pipeline for vibration control.
What is NOT required of such joints?.
Answer: suitable for service at 150 psig or above
◍ Vacuum systems and WAGD system fabricated from coper tubing shall be
permitted to have branch connections made using mechanically formed,
drilled and extruded tee branch connections that are formed in accordance
with the __________. Such branch connections shall be formed by brazing..
Answer: tool manufacture's instructions
◍ What treatments shall be preformed before brazed cut ends of a tube to be
installed in a medical gas piping system?.
Answer: Cut ends shall be rolled smooth or deburred.
◍ GTAW autogenous orbital welded joints shall be purged during welding
with mixture of ___..
Answer: 75% helium, 25% argon
◍ Fittings and other components to be installed on medical gas piping that
were cleaned for oxygen service by the manufacturer, but became
contaminated prior to being installed, shall be permitted to be recleaned
on-site by the installer by thoroughly scrubbing the interior surfaces with a
clean __________ and thoroughly rinsing them with clean, hot, potable
water..
Answer: hot water alkaline solution
◍ When brazing, joints shall be continuously purged with oil-free, dry
nitrogen NF to prevent the formation of __________ on the inside surface of
the joint..
Answer: copper oxide
2026 QUESTIONS WITH ANSWERS
GRADED A+
◍ What is best described as an engineered assembly of components that
operate to raise the concentration of oxygen, providing an oxygen
enriched-atmosphere to a patient?.
Answer: Oxygen Concentrator Unit
◍ As referenced in the NFPA 99, a pressure of 216 psi in a system would be
defined as what kind of pressure?.
Answer: high pressure
◍ what is described as an assembly of equipment for supplying compressed
gas that terminates where the gas, at service pressure, first enter the
mainline? The source gas is stored as a compressed gas or cryogenic fluid in
storage, containers that are either stationary or movable and include
unconnected reserves on hand at the site..
Answer: Bulk system
◍ A __________ system is a assembly of equipment such as a storage
container, 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
reserve on hand at the site..
Answer: Bulk oxygen
◍ An assembly of equipment that holds a capacity of oxygen greater than
__________ is defined as a Bulk Oxygen System..
Answer: 20,000 ft^3
◍ A continuous tape or marker shall be placed immediately above the buried
, pipeline enclosure and shall be identified by ___..
Answer: specific name
◍ Dental air is a compressed gas intended to be used to operate dental devices,
and is supplied by what following sources?.
Answer: - compressed air systems- pressurized cylinders of air- nitrogen
◍ Dental procedures often require the use of nitrous oxide. What method
provides drainage, aspiration and suction to remove body fluids from the
patient during dental treatment..
Answer: Dental/ Surgical Vacuum
◍ the ____________ shall furnish documentation certifying that tubes, valves,
fittings and other piping components have been ___________ by the
manufacturer or by a supplier or agency other than the manufacturer to
cga-4.1.
Answer: Installer; cleaned for oxygen service
◍ The NFPA that all medical gas and vacuum installers, responsible for the
installation of medical gas and vacuum piping, all apperturant piping
support pumps and compressor source systems, and apperturant piping
support systems, not including permanently installed bulk source systems,
shall be certified in accordance with __________..
Answer: ASSE 6010
◍ At a minimum, how many feet shall CMT be identified as suitable for
oxygen by the manufacturer?.
Answer: 3 feet
◍ Brazed joints are permitted to be repaired, except no joint shall be heated
more than?.
Answer: twice
◍ Brazed joints shall be made using a brazing alloy that exhibits a melting
temperature in excess of ___ degrees F to retain the integrity of the piping
system in the event of fire..
Answer: 1000
,◍ What condition must be met where medical gas and vacuum systems are
installed by non-certified personnel?.
Answer: Installation by anyone other than 6010 certified personnel is NOT
permitted.
◍ Brazing procedures and brazer performance for the installation of medical
gas and vacuum piping shall be qualified in accordance with ___..
Answer: ASME section 9 (IX)
◍ CMT shall have a flame spread index of ___ or less and a smoke developed
index of 50 or less as determined by ASTM E84..
Answer: 25
◍ Prior to any installation work on Category 1 distribution piping system, the
installer of medical gas and vacuum piping shall provide maintain
documentation on the jobsite __________..
Answer: for the qualifications of brazing procedures and individual braziers
◍ CMT systems shall be installed by ___ qualified installers using the CMT
manufacturer's instructions..
Answer: ASSE 6010
◍ What type of copper tube hangers shall be used in a potentially damp
location where the hanger would be in contact with the copper tube?.
Answer: electrically insulated with materials that will not absorb moisture
◍ Copper that is 3-1/8" or larger in diameter, with 185 PSI or greater is
required to be what type of copper?.
Answer: Type K
◍ Flex hose and connectors, both metallic and non-metallic, shall be no longer
than necessary and shall have a minimum burst pressure of ___..
Answer: 1000 PSI
◍ in a category 1 health care facility, what is the maximum length allowed for
metallic and non-metallic hoses and flexible connectors for installation in a
medical gas vacuum piping system?.
, Answer: They shall be no longer than necessary
◍ For medical-surgical vacuum systems, piping shall be hard-drawn, seamless
copper tube type ___..
Answer: ASTM B88, ASTM B819, and ASTM B280
◍ Metallic flexible joints are being used in the pipeline for vibration control.
What is NOT required of such joints?.
Answer: suitable for service at 150 psig or above
◍ Vacuum systems and WAGD system fabricated from coper tubing shall be
permitted to have branch connections made using mechanically formed,
drilled and extruded tee branch connections that are formed in accordance
with the __________. Such branch connections shall be formed by brazing..
Answer: tool manufacture's instructions
◍ What treatments shall be preformed before brazed cut ends of a tube to be
installed in a medical gas piping system?.
Answer: Cut ends shall be rolled smooth or deburred.
◍ GTAW autogenous orbital welded joints shall be purged during welding
with mixture of ___..
Answer: 75% helium, 25% argon
◍ Fittings and other components to be installed on medical gas piping that
were cleaned for oxygen service by the manufacturer, but became
contaminated prior to being installed, shall be permitted to be recleaned
on-site by the installer by thoroughly scrubbing the interior surfaces with a
clean __________ and thoroughly rinsing them with clean, hot, potable
water..
Answer: hot water alkaline solution
◍ When brazing, joints shall be continuously purged with oil-free, dry
nitrogen NF to prevent the formation of __________ on the inside surface of
the joint..
Answer: copper oxide
