NRCME (DOT) CERTIFICATION SCRIPT
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◍ When is the initial pressure test conducted, by a medical gas installer on the
nitrous oxide system?.
Answer: after blowdown of the distribution piping
◍ In-line check valves shall have threaded purge points of ____ NPT.
Answer: 1/8 inch
◍ And those portions of systems intended to handle oxygen at pressure is
greater than 350 psi, the interconnecting hose shall NOT contain
_____________ materials.
Answer: Polymeric
◍ In a category, one dental and gas vacuum piping system, which of the
following is an NFPA 99 requirement for the labeling of pipes?.
Answer: Color coding
◍ Mains & branches in medical gas systems shall be no less than ____.
Answer: 1/2 inch
◍ Drops to station outlets and inlets shall be no less than ____ NPS.
Answer: 1/2 inch
◍ Which of the following treatments shall be performed before braising cut
ends of a tube to be installed in a medical gas piping system?.
Answer: Cut ends shall be rolled, smooth or deburred
◍ Copper outlet tubes on station inlets shall be no less than ____
O. D..
Answer: 1/2 inch
,◍ Connecting tubing for gauges and alarm devices shall be permitted to be
____ NPS.
Answer: 1/4 inch
◍ Manifold for gas cylinders shall actuate a(an) ________ signal an shall
activate an indicator at al ____________ alarm panels to indicate when or
just before change over from one header to another..
Answer: Local, master
◍ Category 1 Dental.
Answer: Facilities utilizing General anesthesia & Deep sedation
◍ In a non anesthetizing area , on which side of a zone valve shall the
pressure/vacuum sensor be located?.
Answer: Station outlet/inlet side
◍ 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..
Answer: audible and visual
◍ Instrument air standby headers shall be sufficient for ____ of normal
operation from attached cylinder.
Answer: 1 hour
◍ When an EOSC becomes the temporary supply source, a facility will
monitor the system by use of which of the following?.
Answer: Providing four connection points to both master alarms
◍ Reserves cylinders for Liquid Ring compressors shall be sufficient for ____
normal operation, when installed.
Answer: 1-hour
◍ Quality of medical air shall not have permanent particulates sized ____ or
larger in the air.
Answer: 1 Micron
◍ Defective joints are allowed to be reheated ____ time before it must be
, replaced.
Answer: one
◍ Which of the following conditions must be met where medical gas and
vacuum systems are installed by a non-certified personnel?.
Answer: installation by anyone other than 6010 certified personnel is NOT
permitted
◍ Metallic flexible, joints are being used in the pipeline for vibration control.
Which of the following is NOT REQUIRED OF SUCH JOINTS?.
Answer: Suitable for service at 150 psig or above
◍ Who shall witness the installer performed standing vacuum test?.
Answer: the authority having jurisdiction, or its designee
◍ Manufactured assemblies are subject to a standing pressure test to ensure a
less than ____ loss in pressure.
Answer: 1%
◍ Oxygen analyzers shall read that there is less than ____ concentration in the
system before any brazing can begin.
Answer: 1% oxygen
◍ Fittings may be re-cleaned on-site using a solution of ____ pound of sodium
carbonate to 3 gallons of water.
Answer: 1
◍ Category ____ space is one in which failure of equipment or a system is
likely to cause major injury or death of patients, staff, or visitors.
Answer: 1
◍ Only ____ service valve is required off the riser for each branch.
Answer: one
◍ The medical air compressor intake shall be located a minimum of how many
feet from any exhaust or plumbing vents?.
Answer: 25 feet
◍ The installation of cryogenic fluid central supply systems shall be compliant
, with CGA ____.
Answer: M-1
◍ The gas produced by evaporation from the secondary header and a
cryogenic liquid cylinder system shall enter the supply system ________ of
the final line regulator.
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?.
Answer: pediatric
◍ Factory installed inlet tubes on station outlets NOT be less than ________
with 0.3 inch minimum inside diameter.
Answer: NPS 1/4, 3/8 in. O.D.
◍ Which of these operations would NOT breach the vacuum system?.
Answer: testing a system component with a leak detectant solution
◍ Except for valves in zone valve boxes, all vowels 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
◍ The outdoor location of bulk cryogenic liquid central systems shall be
compliant with CGA ____.
Answer: M-1
◍ Fittings, valves, and other components for filled 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
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◍ When is the initial pressure test conducted, by a medical gas installer on the
nitrous oxide system?.
Answer: after blowdown of the distribution piping
◍ In-line check valves shall have threaded purge points of ____ NPT.
Answer: 1/8 inch
◍ And those portions of systems intended to handle oxygen at pressure is
greater than 350 psi, the interconnecting hose shall NOT contain
_____________ materials.
Answer: Polymeric
◍ In a category, one dental and gas vacuum piping system, which of the
following is an NFPA 99 requirement for the labeling of pipes?.
Answer: Color coding
◍ Mains & branches in medical gas systems shall be no less than ____.
Answer: 1/2 inch
◍ Drops to station outlets and inlets shall be no less than ____ NPS.
Answer: 1/2 inch
◍ Which of the following treatments shall be performed before braising cut
ends of a tube to be installed in a medical gas piping system?.
Answer: Cut ends shall be rolled, smooth or deburred
◍ Copper outlet tubes on station inlets shall be no less than ____
O. D..
Answer: 1/2 inch
,◍ Connecting tubing for gauges and alarm devices shall be permitted to be
____ NPS.
Answer: 1/4 inch
◍ Manifold for gas cylinders shall actuate a(an) ________ signal an shall
activate an indicator at al ____________ alarm panels to indicate when or
just before change over from one header to another..
Answer: Local, master
◍ Category 1 Dental.
Answer: Facilities utilizing General anesthesia & Deep sedation
◍ In a non anesthetizing area , on which side of a zone valve shall the
pressure/vacuum sensor be located?.
Answer: Station outlet/inlet side
◍ 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..
Answer: audible and visual
◍ Instrument air standby headers shall be sufficient for ____ of normal
operation from attached cylinder.
Answer: 1 hour
◍ When an EOSC becomes the temporary supply source, a facility will
monitor the system by use of which of the following?.
Answer: Providing four connection points to both master alarms
◍ Reserves cylinders for Liquid Ring compressors shall be sufficient for ____
normal operation, when installed.
Answer: 1-hour
◍ Quality of medical air shall not have permanent particulates sized ____ or
larger in the air.
Answer: 1 Micron
◍ Defective joints are allowed to be reheated ____ time before it must be
, replaced.
Answer: one
◍ Which of the following conditions must be met where medical gas and
vacuum systems are installed by a non-certified personnel?.
Answer: installation by anyone other than 6010 certified personnel is NOT
permitted
◍ Metallic flexible, joints are being used in the pipeline for vibration control.
Which of the following is NOT REQUIRED OF SUCH JOINTS?.
Answer: Suitable for service at 150 psig or above
◍ Who shall witness the installer performed standing vacuum test?.
Answer: the authority having jurisdiction, or its designee
◍ Manufactured assemblies are subject to a standing pressure test to ensure a
less than ____ loss in pressure.
Answer: 1%
◍ Oxygen analyzers shall read that there is less than ____ concentration in the
system before any brazing can begin.
Answer: 1% oxygen
◍ Fittings may be re-cleaned on-site using a solution of ____ pound of sodium
carbonate to 3 gallons of water.
Answer: 1
◍ Category ____ space is one in which failure of equipment or a system is
likely to cause major injury or death of patients, staff, or visitors.
Answer: 1
◍ Only ____ service valve is required off the riser for each branch.
Answer: one
◍ The medical air compressor intake shall be located a minimum of how many
feet from any exhaust or plumbing vents?.
Answer: 25 feet
◍ The installation of cryogenic fluid central supply systems shall be compliant
, with CGA ____.
Answer: M-1
◍ The gas produced by evaporation from the secondary header and a
cryogenic liquid cylinder system shall enter the supply system ________ of
the final line regulator.
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?.
Answer: pediatric
◍ Factory installed inlet tubes on station outlets NOT be less than ________
with 0.3 inch minimum inside diameter.
Answer: NPS 1/4, 3/8 in. O.D.
◍ Which of these operations would NOT breach the vacuum system?.
Answer: testing a system component with a leak detectant solution
◍ Except for valves in zone valve boxes, all vowels 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
◍ The outdoor location of bulk cryogenic liquid central systems shall be
compliant with CGA ____.
Answer: M-1
◍ Fittings, valves, and other components for filled 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
