2021 NFPA99 Medical Gas Questions
with Correct Answers
A manual reset local alarm that indicates when the capacity of the instrument air central
supply system not in use is less than the equivalent capacity of - ANSWERSOne
compressor
After a final tie - In on an active vacuum system , each vacuum joints shall be tested
with a leak detector or other means that will allow detectant on an active vacuum
system . - ANSWERSUltrasonic
After the final tie-in each joint shall be leak tested by the source gas. New work and the
existing system at the normal operating pressure shall be leak checked with a leak
detectant that is safe for use with oxygen and does NOT contain _______________ -
ANSWERSAmmonia
After the piping system, the blow down test shall be done. Then the installer must
perform which of the following test? - ANSWERSInitial pressure test
Alarm panels and shutoff valves labeling shall be ____________ when modifications
are made, changing the areas serviced - ANSWERSUpdated
All gas outlets with gauge pressure of 345 kPa (50 psi), including, but not limited to,
oxygen, nitrous oxide, medical air, and carbon dioxide, shall deliver 100 SLPM (3.5
SCFM) with a pressure drop of not more than 35 kPa (______) and static pressure of
345 kPa to 380 kPa (50psi to 55 psi) - ANSWERS5 psi
Area alarms shall be tested to verify the warning signals for all vital life support and
critical care areas if the pressure in the piping system increases or decreases by
_______ - ANSWERS20%
At the sample port a demand of approximated 25% load shall be created to cause the
compressors to cycle on and off continuously and the dryers to operate for the ______
period. - ANSWERS12 hour
Before the piping system is put into use, who is responsible for the ascertaining that the
gas delivered to the outlet/inlet has the proper labels and connecting fittings. -
ANSWERSFacility authority
Breached portions of the systems subject to inspection and testing shall be confined to
only the specific altered zone or area that is downstream for pressure gases at the point
of intrusion. Where a system shall be declared breached? - ANSWERSPhysical
, separation of pipeline, system component removal, replacement or addition of system
components
Category 2 & 3 medical has and vacuum systems are allowed to be ________ on the
amount of compressors and vacuum pumps - ANSWERSSimplex
Category 2 oxygen piping shall be at least 1 size larger than piping for _______? -
ANSWERSNitrous oxide
Category 3 gas-power device supply systems, vacuum systems and scavenging
systems. The initial tests shall be performed before the final tests shall be conducted by
______. - ANSWERSInstaller, representative of the system manufacturer, medical gas
system verifier 6030
Category 3 piped gas and vacuum systems only ______ shall be permitted. -
ANSWERSMinimal or no sedation
Category 3 vacuum source equipment shall be obtained from, and be installed under
the supervision of the __________? - ANSWERSManufacturer, supplier, who is familiar
with its installation, operation and use
Category 2 & 3 medical gas systems are required to have how many alarm panels? -
ANSWERS1
Cylinders in service and in storage shall be __________ secured and located to prevent
falling or being knocked over. - ANSWERSIndividually
Dental air sources for a compressor intake located inside the building shall be located
within a space where no _______ are stored or used. - ANSWERSChemical based
materials, patient medical treatment, discharge from category 3 vacuum system
Dental applications that use flexible connectors shall have a gauge pressure rating not
less than _______ - ANSWERS1000 psi
Distribution piping for support gas systems (nitrogen and instrument air) shall be
________ type "L" copper tube - ANSWERSASTM B819
During the initial pressure test, the source shutoff valve shall remain closed and the test
pressure for pressure gases shall be 1.5 times the system working pressure, but not
less than ______ - ANSWERS150 psi
Each health care facility shall designate one or more individuals to be the _______ with
respect to the facility's medical gas and vacuum systems. - ANSWERSResponsible
facility authority
with Correct Answers
A manual reset local alarm that indicates when the capacity of the instrument air central
supply system not in use is less than the equivalent capacity of - ANSWERSOne
compressor
After a final tie - In on an active vacuum system , each vacuum joints shall be tested
with a leak detector or other means that will allow detectant on an active vacuum
system . - ANSWERSUltrasonic
After the final tie-in each joint shall be leak tested by the source gas. New work and the
existing system at the normal operating pressure shall be leak checked with a leak
detectant that is safe for use with oxygen and does NOT contain _______________ -
ANSWERSAmmonia
After the piping system, the blow down test shall be done. Then the installer must
perform which of the following test? - ANSWERSInitial pressure test
Alarm panels and shutoff valves labeling shall be ____________ when modifications
are made, changing the areas serviced - ANSWERSUpdated
All gas outlets with gauge pressure of 345 kPa (50 psi), including, but not limited to,
oxygen, nitrous oxide, medical air, and carbon dioxide, shall deliver 100 SLPM (3.5
SCFM) with a pressure drop of not more than 35 kPa (______) and static pressure of
345 kPa to 380 kPa (50psi to 55 psi) - ANSWERS5 psi
Area alarms shall be tested to verify the warning signals for all vital life support and
critical care areas if the pressure in the piping system increases or decreases by
_______ - ANSWERS20%
At the sample port a demand of approximated 25% load shall be created to cause the
compressors to cycle on and off continuously and the dryers to operate for the ______
period. - ANSWERS12 hour
Before the piping system is put into use, who is responsible for the ascertaining that the
gas delivered to the outlet/inlet has the proper labels and connecting fittings. -
ANSWERSFacility authority
Breached portions of the systems subject to inspection and testing shall be confined to
only the specific altered zone or area that is downstream for pressure gases at the point
of intrusion. Where a system shall be declared breached? - ANSWERSPhysical
, separation of pipeline, system component removal, replacement or addition of system
components
Category 2 & 3 medical has and vacuum systems are allowed to be ________ on the
amount of compressors and vacuum pumps - ANSWERSSimplex
Category 2 oxygen piping shall be at least 1 size larger than piping for _______? -
ANSWERSNitrous oxide
Category 3 gas-power device supply systems, vacuum systems and scavenging
systems. The initial tests shall be performed before the final tests shall be conducted by
______. - ANSWERSInstaller, representative of the system manufacturer, medical gas
system verifier 6030
Category 3 piped gas and vacuum systems only ______ shall be permitted. -
ANSWERSMinimal or no sedation
Category 3 vacuum source equipment shall be obtained from, and be installed under
the supervision of the __________? - ANSWERSManufacturer, supplier, who is familiar
with its installation, operation and use
Category 2 & 3 medical gas systems are required to have how many alarm panels? -
ANSWERS1
Cylinders in service and in storage shall be __________ secured and located to prevent
falling or being knocked over. - ANSWERSIndividually
Dental air sources for a compressor intake located inside the building shall be located
within a space where no _______ are stored or used. - ANSWERSChemical based
materials, patient medical treatment, discharge from category 3 vacuum system
Dental applications that use flexible connectors shall have a gauge pressure rating not
less than _______ - ANSWERS1000 psi
Distribution piping for support gas systems (nitrogen and instrument air) shall be
________ type "L" copper tube - ANSWERSASTM B819
During the initial pressure test, the source shutoff valve shall remain closed and the test
pressure for pressure gases shall be 1.5 times the system working pressure, but not
less than ______ - ANSWERS150 psi
Each health care facility shall designate one or more individuals to be the _______ with
respect to the facility's medical gas and vacuum systems. - ANSWERSResponsible
facility authority
