Med gas Refresher EXAM STUDY GUIDE
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. When is the initial pressure test conducted, by a medical gas installer, on a
nitrous oxide system? - ANSWER ✔ After blowdown of a distribution
piping
2. In those portions of systems intended to handle oxygen at pressures greater
than 350 psi the interconnecting hose shall NOT contain ________
materials? - ANSWER ✔ Polymeric
3. In a Category 1 Dental and Gas Vacuum Piping system, which of the
following is an NFPA 99 requirement for the labeling of pipes? - ANSWER
✔ Color coding & non-standard pressure
4. Which of the following treatments shall be performed before brazing cut
ends of a tube to be installed in a medical gas piping system? - ANSWER ✔
Cut ends shall be rolled smooth or deburred
5. Manifolds for gas cylinders shall actuate a(an) _______ signal and shall
activate an indicator at all _______ alarm panels to indicate when or just
before changeover from one header to the other. - ANSWER ✔ Local,
master
,6. In a non-anesthetizing area, on which side of a zone valve shall the
pressure/vacuum sensor be located? - ANSWER ✔ Station outlet/inlet
7. station outlets that operate at pressures other than standard gauge pressure
(50-55 psi or 160-185 psi for nitrogen), what is required of the outlet
labeling? - ANSWER ✔ include the operating pressure along with the name
of the gas
8. in compliance with NFPA 70 the new alarm wiring is being run installed
underground from the initiating device at the source to a junction box
located where the wiring first enters the building. NFPA 99 permits what
minimum number of sets of wires to connect the initiating device with the
junction box for each signal? - ANSWER ✔ 1
9. Which of the following filler metals shall be used to braze copper to copper
joints in a medical gas/vacuum distribution pipin? - ANSWER ✔ BCuP
series
10.to assure that all ambient air has been removed from the pipeline prior to
brazing a/an _______________ shall be used to verify the effectiveness of
the nitrogen purge. - ANSWER ✔ oxygen analyzer
11.factory installed tubes on station inlets shall be NOT less than
______________ with 0.4 inch minimum inside diameter. - ANSWER ✔
3/8 NPS
12.the minimum backfilled cover for buried piping shall be 36 in., except that a
minimum cover shall be reduced to _____________ where physical damage
is otherwise prevented. - ANSWER ✔ 18 in
,13.the installation of medical gas and vacuum systems shall be made by
experienced, qualified and competent installers. the installers shall meet the
requirement of _______________ - ANSWER ✔ ASSE Standard 6010
14.after completion of all installer-performed tests which of the following
methods shall be used to determine that no c ross-connection exists? -
ANSWER ✔ individual pressurization
15.in an Emergency Oxygen Supply connection the check valves are required to
be constructed of which of the following materials? - ANSWER ✔ brass or
bronze
16.which of these is a requirement for each station inlet? - ANSWER ✔ a
primary valve
17.medical gas central supply systems are NOT permitted to be located where?
- ANSWER ✔ in an unlocked location
18.fittings, valves, and other components for oxygen use in a category 1
distribution system shall be ________________ until prepared for
installation - ANSWER ✔ delivered sealed, labeled and kept sealed
19.In central supply systems using gas cylinders, each header shall have a
_______ valve to prevent back flow and to permit service to the header.
A. ball
B. bypass
C. check
D. relief - ANSWER ✔ C. check
, 20.Which type of connectors shall connect the medical air compressors with
their intake an d outlet piping?
A. compression fitting
B. dielectric
C. flexible
D. insulated - ANSWER ✔ C. flexible
21.WAGD networks shall provide a WAGD inlet in all location where _____ is
intended to be administered.
A. medical air
B. nitrogen
C. nitrous oxide
D. oxygen - ANSWER ✔ C. nitrous oxide
22.In a bulk supply system, when the cryogenic liquid reserve's contents are
reduced to one day's supply, which alarm system(s) shall be activated?
A. area
B. local
C. master
D. master and area - ANSWER ✔ C. master
23.Which is a permitted use of the medical-surgical vacuum system?
A. liquid or debris disposal
B. non-medical or non-surgical applications
C. vacuum steam condensate return
D. waste anesthetic gas disposal - ANSWER ✔ D. waste anesthetic gas
disposal
24.Which of the following is an instrument air quality requirement?
A. It shall be compliant with instrument air section in ANS/ISA S-7.0.01
B. it shall be dry to a dew point of -30 degrees F
C. It shall be filtered to 0.7
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. When is the initial pressure test conducted, by a medical gas installer, on a
nitrous oxide system? - ANSWER ✔ After blowdown of a distribution
piping
2. In those portions of systems intended to handle oxygen at pressures greater
than 350 psi the interconnecting hose shall NOT contain ________
materials? - ANSWER ✔ Polymeric
3. In a Category 1 Dental and Gas Vacuum Piping system, which of the
following is an NFPA 99 requirement for the labeling of pipes? - ANSWER
✔ Color coding & non-standard pressure
4. Which of the following treatments shall be performed before brazing cut
ends of a tube to be installed in a medical gas piping system? - ANSWER ✔
Cut ends shall be rolled smooth or deburred
5. Manifolds for gas cylinders shall actuate a(an) _______ signal and shall
activate an indicator at all _______ alarm panels to indicate when or just
before changeover from one header to the other. - ANSWER ✔ Local,
master
,6. In a non-anesthetizing area, on which side of a zone valve shall the
pressure/vacuum sensor be located? - ANSWER ✔ Station outlet/inlet
7. station outlets that operate at pressures other than standard gauge pressure
(50-55 psi or 160-185 psi for nitrogen), what is required of the outlet
labeling? - ANSWER ✔ include the operating pressure along with the name
of the gas
8. in compliance with NFPA 70 the new alarm wiring is being run installed
underground from the initiating device at the source to a junction box
located where the wiring first enters the building. NFPA 99 permits what
minimum number of sets of wires to connect the initiating device with the
junction box for each signal? - ANSWER ✔ 1
9. Which of the following filler metals shall be used to braze copper to copper
joints in a medical gas/vacuum distribution pipin? - ANSWER ✔ BCuP
series
10.to assure that all ambient air has been removed from the pipeline prior to
brazing a/an _______________ shall be used to verify the effectiveness of
the nitrogen purge. - ANSWER ✔ oxygen analyzer
11.factory installed tubes on station inlets shall be NOT less than
______________ with 0.4 inch minimum inside diameter. - ANSWER ✔
3/8 NPS
12.the minimum backfilled cover for buried piping shall be 36 in., except that a
minimum cover shall be reduced to _____________ where physical damage
is otherwise prevented. - ANSWER ✔ 18 in
,13.the installation of medical gas and vacuum systems shall be made by
experienced, qualified and competent installers. the installers shall meet the
requirement of _______________ - ANSWER ✔ ASSE Standard 6010
14.after completion of all installer-performed tests which of the following
methods shall be used to determine that no c ross-connection exists? -
ANSWER ✔ individual pressurization
15.in an Emergency Oxygen Supply connection the check valves are required to
be constructed of which of the following materials? - ANSWER ✔ brass or
bronze
16.which of these is a requirement for each station inlet? - ANSWER ✔ a
primary valve
17.medical gas central supply systems are NOT permitted to be located where?
- ANSWER ✔ in an unlocked location
18.fittings, valves, and other components for oxygen use in a category 1
distribution system shall be ________________ until prepared for
installation - ANSWER ✔ delivered sealed, labeled and kept sealed
19.In central supply systems using gas cylinders, each header shall have a
_______ valve to prevent back flow and to permit service to the header.
A. ball
B. bypass
C. check
D. relief - ANSWER ✔ C. check
, 20.Which type of connectors shall connect the medical air compressors with
their intake an d outlet piping?
A. compression fitting
B. dielectric
C. flexible
D. insulated - ANSWER ✔ C. flexible
21.WAGD networks shall provide a WAGD inlet in all location where _____ is
intended to be administered.
A. medical air
B. nitrogen
C. nitrous oxide
D. oxygen - ANSWER ✔ C. nitrous oxide
22.In a bulk supply system, when the cryogenic liquid reserve's contents are
reduced to one day's supply, which alarm system(s) shall be activated?
A. area
B. local
C. master
D. master and area - ANSWER ✔ C. master
23.Which is a permitted use of the medical-surgical vacuum system?
A. liquid or debris disposal
B. non-medical or non-surgical applications
C. vacuum steam condensate return
D. waste anesthetic gas disposal - ANSWER ✔ D. waste anesthetic gas
disposal
24.Which of the following is an instrument air quality requirement?
A. It shall be compliant with instrument air section in ANS/ISA S-7.0.01
B. it shall be dry to a dew point of -30 degrees F
C. It shall be filtered to 0.7
