NFPA 99 MEDICAL GAS 2025-2026 EXAM QUESTIONS
WITH COMPLETE SOLUTIONS
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 |ANSWER |>>>One
|
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 ANSWER >>>Ultrasonic
| | |
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 ANSWER
| |
>>>Ammonia
After |the |piping |system, |the |blow |down |test |shall |be |done. |Then |the |installer |must |perform
| which |of |the |following |test? |- |CORRECT |ANSWER |>>>Initial |pressure |test
Alarm |panels |and |shutoff |valves |labeling |shall |be | when |modifications |are |made,
| changing |the |areas |serviced |- |CORRECT|ANSWER |>>>Updated
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 |ANSWER |>>>5 |psi
1 || |P |a |g
|e
,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
| ANSWER >>>20% |
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 ANSWER >>>12 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
| ANSWER >>>Facility 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 |ANSWER |>>>Physical |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 |ANSWER |>>>Simplex
Category |2 |oxygen |piping |shall |be |at |least |1 |size |larger |than |piping |for | ? |- |CORRECT
| ANSWER >>>Nitrous 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 ANSWER >>>Installer, representative of the system manufacturer, medical gas
| | | | | | | | |
| system |verifier |6030
2 || |P |a |g
|e
, Category |3 |piped |gas |and |vacuum |systems |only | shall |be |permitted. |- |CORRECT
ANSWER >>>Minimal or no sedation
| | | | |
Category |3 |vacuum |source |equipment |shall |be |obtained |from, |and |be |installed |under |the
supervision |of |the | ? |- |CORRECT |ANSWER |>>>Manufacturer,|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 ANSWER >>>1 | |
Cylinders |in |service |and |in |storage |shall |be | secured |and |located |to |prevent |falling |or
| being |knocked |over. |- |CORRECT |ANSWER |>>>Individually
Dental |air |sources |for |a |compressor |intake |located |inside |the |building |shall |be |located |within
|a |space |where |no | are |stored |or |used. |- |CORRECT|ANSWER |>>>Chemical |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
- CORRECT ANSWER >>>1000 psi
| | | |
Distribution |piping |for |support |gas |systems |(nitrogen |and |instrument |air) |shall |be | type
| "L" |copper |tube |- |CORRECT |ANSWER |>>>ASTM |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
- CORRECT ANSWER >>>150 psi
| | | |
3 || |P |a |g
|e
WITH COMPLETE SOLUTIONS
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 |ANSWER |>>>One
|
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 ANSWER >>>Ultrasonic
| | |
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 ANSWER
| |
>>>Ammonia
After |the |piping |system, |the |blow |down |test |shall |be |done. |Then |the |installer |must |perform
| which |of |the |following |test? |- |CORRECT |ANSWER |>>>Initial |pressure |test
Alarm |panels |and |shutoff |valves |labeling |shall |be | when |modifications |are |made,
| changing |the |areas |serviced |- |CORRECT|ANSWER |>>>Updated
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 |ANSWER |>>>5 |psi
1 || |P |a |g
|e
,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
| ANSWER >>>20% |
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 ANSWER >>>12 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
| ANSWER >>>Facility 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 |ANSWER |>>>Physical |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 |ANSWER |>>>Simplex
Category |2 |oxygen |piping |shall |be |at |least |1 |size |larger |than |piping |for | ? |- |CORRECT
| ANSWER >>>Nitrous 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 ANSWER >>>Installer, representative of the system manufacturer, medical gas
| | | | | | | | |
| system |verifier |6030
2 || |P |a |g
|e
, Category |3 |piped |gas |and |vacuum |systems |only | shall |be |permitted. |- |CORRECT
ANSWER >>>Minimal or no sedation
| | | | |
Category |3 |vacuum |source |equipment |shall |be |obtained |from, |and |be |installed |under |the
supervision |of |the | ? |- |CORRECT |ANSWER |>>>Manufacturer,|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 ANSWER >>>1 | |
Cylinders |in |service |and |in |storage |shall |be | secured |and |located |to |prevent |falling |or
| being |knocked |over. |- |CORRECT |ANSWER |>>>Individually
Dental |air |sources |for |a |compressor |intake |located |inside |the |building |shall |be |located |within
|a |space |where |no | are |stored |or |used. |- |CORRECT|ANSWER |>>>Chemical |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
- CORRECT ANSWER >>>1000 psi
| | | |
Distribution |piping |for |support |gas |systems |(nitrogen |and |instrument |air) |shall |be | type
| "L" |copper |tube |- |CORRECT |ANSWER |>>>ASTM |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
- CORRECT ANSWER >>>150 psi
| | | |
3 || |P |a |g
|e
