NFPA-99: PRACTICE TEST QUESTIONS AND
CORRECT ANSWERS 100% VERIFIED
LATEST UPDATED 2026\2027
Under which of these conditions shall the instrument Air Reserve header cylinders be permitted to be
stored with the instrument air compressor?
A) the mechanical equipment room does not contain a boiler.
B) the medical air compressors are in the same room.
C) the only motor-driven machinery in the room is for instrument air equipment.
D) the room is secured with lockable doors. - CORRECT ANSWER-C) The only motor-driven machinery in
the room is for the instrument air equipment
Riser valves are those valves located where?
A) adjacent to the main riser downstream of any zone valve.
B) anywhere in the lateral branches of the piping system.
C) in the mainline adjacent to the base of the riser.
D) in the riser adjacent to the mainline. - CORRECT ANSWER-D) In the riser adjacent to the main line
When is the initial pressure test conducted by the installer?
A) after blowdown of the distribution piping.
B) after installation of alarm sensors.
C) before blowdown of distribution piping.
D) before installation of station rough in assembly. - CORRECT ANSWER-A) After blow-down of the
distribution piping.
In those portions of systems intended to handle oxygen at pressure greater than 350 psi the inter
connecting hose shall not contain what materials?
A) brass.
B) copper
C) polymeric
,D) stainless steel - CORRECT ANSWER-C) Polymeric
The tool shown here allows the installer to mechanically limit the makeup depth of the fitting to be
brazed. Under what condition is this method permitted for the installation of medical gas piping?
A) only on final line connectors.
B) only on vacuum systems.
C) where only B cup 5 brazing rod is used
D) where the limited makeup depth is not less than minimum cut depth her ANSI / ASME
recommendations - CORRECT ANSWER-D) Where the limited makeup depth is not less than minimum
cup depth current ANSI\ASME recommendation
What is the standard gauge pressure for nitrogen gas service?
A) 15 - 30
B) 50 - 55
C) 162 185
D) it varies with system type. - CORRECT ANSWER-C) 50 - 55 psi
What is a NFPA 99 requirement for labeling of pipes in medical gas system?
A) color coding
B) fixed label with
C) label shall wrap completely around pipe.
D) reflective label - CORRECT ANSWER-A) Color coding
A wireless communication device is employed in a medical gas or vacuum warning system. what type of
supervision is required for this device?
A) a visual indicator Shelby located in maintenance officer or engineering department.
B) this device shall be installed at the medical gas or vacuum source.
C) this device shall be located at nurses station.
D) this device will be supervised such that failure communication shall initiate an alarm. - CORRECT
ANSWER-D) This device will be supervised such that failure of communication shall initate an alarm
, In a facility where Medical Gas vacuum systems are present and the failure of such equipment or
systems is likely to cause any major injury or death to patients or caregivers this system shall be
designed to meet which category requirements?
A) 1
B) 2
C) 3
D) 4 - CORRECT ANSWER-A) category 1
A faculty is in the planning stages of installing an emergency oxygen service connection (ESOC). How
many feet is the minimum amount of clearance required around this connection?
A) 1 foot
B) 3 feet
C) 5 feet
D) Clearance must be 1-1/2 times the width of the auxiliary. - CORRECT ANSWER-B) 3 feet
Wooden rack for cylinder storage may be permitted under which conditions?
A) the wooden must be painted.
B) they are permitted with no set conditions .
C) they must be located in an area with fire suppression system.
D) Wooden racks are no longer permitted - CORRECT ANSWER-D) Wooden racks are no longer
permitted
If nonmetallic flexible connectors is being used in a category 1 healthcare faculty to connect to the
manifold to the gas distribution piping what is the maximum length permitted for the flexible
connectors?
A) 2.5 feet
B) 5 feet
C) They shall be no longer necessary
D) the use of flexible connectors is not permitted. - CORRECT ANSWER-C) They shall be no longer
necessary
CORRECT ANSWERS 100% VERIFIED
LATEST UPDATED 2026\2027
Under which of these conditions shall the instrument Air Reserve header cylinders be permitted to be
stored with the instrument air compressor?
A) the mechanical equipment room does not contain a boiler.
B) the medical air compressors are in the same room.
C) the only motor-driven machinery in the room is for instrument air equipment.
D) the room is secured with lockable doors. - CORRECT ANSWER-C) The only motor-driven machinery in
the room is for the instrument air equipment
Riser valves are those valves located where?
A) adjacent to the main riser downstream of any zone valve.
B) anywhere in the lateral branches of the piping system.
C) in the mainline adjacent to the base of the riser.
D) in the riser adjacent to the mainline. - CORRECT ANSWER-D) In the riser adjacent to the main line
When is the initial pressure test conducted by the installer?
A) after blowdown of the distribution piping.
B) after installation of alarm sensors.
C) before blowdown of distribution piping.
D) before installation of station rough in assembly. - CORRECT ANSWER-A) After blow-down of the
distribution piping.
In those portions of systems intended to handle oxygen at pressure greater than 350 psi the inter
connecting hose shall not contain what materials?
A) brass.
B) copper
C) polymeric
,D) stainless steel - CORRECT ANSWER-C) Polymeric
The tool shown here allows the installer to mechanically limit the makeup depth of the fitting to be
brazed. Under what condition is this method permitted for the installation of medical gas piping?
A) only on final line connectors.
B) only on vacuum systems.
C) where only B cup 5 brazing rod is used
D) where the limited makeup depth is not less than minimum cut depth her ANSI / ASME
recommendations - CORRECT ANSWER-D) Where the limited makeup depth is not less than minimum
cup depth current ANSI\ASME recommendation
What is the standard gauge pressure for nitrogen gas service?
A) 15 - 30
B) 50 - 55
C) 162 185
D) it varies with system type. - CORRECT ANSWER-C) 50 - 55 psi
What is a NFPA 99 requirement for labeling of pipes in medical gas system?
A) color coding
B) fixed label with
C) label shall wrap completely around pipe.
D) reflective label - CORRECT ANSWER-A) Color coding
A wireless communication device is employed in a medical gas or vacuum warning system. what type of
supervision is required for this device?
A) a visual indicator Shelby located in maintenance officer or engineering department.
B) this device shall be installed at the medical gas or vacuum source.
C) this device shall be located at nurses station.
D) this device will be supervised such that failure communication shall initiate an alarm. - CORRECT
ANSWER-D) This device will be supervised such that failure of communication shall initate an alarm
, In a facility where Medical Gas vacuum systems are present and the failure of such equipment or
systems is likely to cause any major injury or death to patients or caregivers this system shall be
designed to meet which category requirements?
A) 1
B) 2
C) 3
D) 4 - CORRECT ANSWER-A) category 1
A faculty is in the planning stages of installing an emergency oxygen service connection (ESOC). How
many feet is the minimum amount of clearance required around this connection?
A) 1 foot
B) 3 feet
C) 5 feet
D) Clearance must be 1-1/2 times the width of the auxiliary. - CORRECT ANSWER-B) 3 feet
Wooden rack for cylinder storage may be permitted under which conditions?
A) the wooden must be painted.
B) they are permitted with no set conditions .
C) they must be located in an area with fire suppression system.
D) Wooden racks are no longer permitted - CORRECT ANSWER-D) Wooden racks are no longer
permitted
If nonmetallic flexible connectors is being used in a category 1 healthcare faculty to connect to the
manifold to the gas distribution piping what is the maximum length permitted for the flexible
connectors?
A) 2.5 feet
B) 5 feet
C) They shall be no longer necessary
D) the use of flexible connectors is not permitted. - CORRECT ANSWER-C) They shall be no longer
necessary
