2021 NFPA99 MEDICAL GAS EXAM
WITH CORRECT QUESTIONS AND
ANSWERS 2025
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 - CORRECT-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 . -
CORRECT-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 _______________ - CORRECT-
ANSWERSAmmonia
,After the piping system, the blow down test shall be done. Then the installer must perform
which of the following test? - CORRECT-ANSWERSInitial pressure test
Alarm panels and shutoff valves labeling shall be ____________ when modifications are
made, changing the areas serviced - CORRECT-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) - CORRECT-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 _______ -
CORRECT-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. - CORRECT-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. - CORRECT-
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? - CORRECT-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 - CORRECT-ANSWERSSimplex
, Category 2 oxygen piping shall be at least 1 size larger than piping for _______? - CORRECT-
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 ______. -
CORRECT-ANSWERSInstaller, representative of the system manufacturer, medical gas
system verifier 6030
Category 3 piped gas and vacuum systems only ______ shall be permitted. - CORRECT-
ANSWERSMinimal or no sedation
Category 3 vacuum source equipment shall be obtained from, and be installed under the
supervision of the __________? - CORRECT-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? -
CORRECT-ANSWERS1
WITH CORRECT QUESTIONS AND
ANSWERS 2025
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 - CORRECT-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 . -
CORRECT-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 _______________ - CORRECT-
ANSWERSAmmonia
,After the piping system, the blow down test shall be done. Then the installer must perform
which of the following test? - CORRECT-ANSWERSInitial pressure test
Alarm panels and shutoff valves labeling shall be ____________ when modifications are
made, changing the areas serviced - CORRECT-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) - CORRECT-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 _______ -
CORRECT-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. - CORRECT-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. - CORRECT-
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? - CORRECT-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 - CORRECT-ANSWERSSimplex
, Category 2 oxygen piping shall be at least 1 size larger than piping for _______? - CORRECT-
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 ______. -
CORRECT-ANSWERSInstaller, representative of the system manufacturer, medical gas
system verifier 6030
Category 3 piped gas and vacuum systems only ______ shall be permitted. - CORRECT-
ANSWERSMinimal or no sedation
Category 3 vacuum source equipment shall be obtained from, and be installed under the
supervision of the __________? - CORRECT-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? -
CORRECT-ANSWERS1
