MED GAS EXAM QUESTIONS WITH
COMPLETE SOLUTIONS
_______ locations for oxygen, nitrous oxide, and mixtures of these gasses shall NOT
communicate with critical care areas, anesthetizing locations where
moderate/deep/general anesthesia are administered, locations storing flammables,
open electric contacts or transformer rooms, flammable/combustible liquid storage tank
rooms, engines, kitchens, and areas with open flames. - Answer-Indoor
Natural ventilation shall be installed in medical gas storage or transfilling areas. It shall
consist of ______ non-closable louvered openings, each having aggregate free open
area of no less than ____ inches squared. Located within 1' of ____________ and 1' of
__________. - Answer-2, 72", floor, ceiling
Mechanical ventilation shall be installed in medical gas storage or transfilling areas IF
natural ventilation can't be provided. It shall provide continous negative pressure. Inlet
shall draw air from within _________' of floor and adjacent to the cylinders/containers.
Exhaust flow rate of at least _______cfm but not more than _______cfm. Dedicated
exhaust system shall NOT be required provided that the system does not connect to
spaces that contain _____________or____________ materials. - Answer-1', 50cfm,
500 cfm, combustible or flammable
Instrument air shall be suffiecient for ______hours normal operation. - Answer-1 hour
Reciprocating compressors for medical air shall be designed to prevent the introduction
of contaminants or liquids into the pipeline by elimating oil anywhere in the compressor
by at least 2 seals creating an area open to atmosphere. This allows direct and
unobstructed visual inspection of the interconnecting shaft through vent and inspection
openings no smaller than ______ shaft diameters in size. - Answer-1.5 times shaft
diameter
GAS cylinder header manifolds consist of 2 equal headers, each with a sufficient
number of gas cylinder connections for _____ days average supply, but not FEWER
than _____ connections. - Answer-1 day supply, 2 connections minimum
Cryogenic LIQUID containers header manifolds consist of 2 equal headers, each having
sufficient number of liquid container connections for _____ days average supply.
Reserve header not having FEWER than _____ connections. - Answer-1 day supply, 3
connections minimum
There shall be ____' minimum fo clearance around storage containers and E.O.S.C. -
Answer-3'
, Gas tungsten arc welding (GTAW) orbital purge using 75% helium/25% argon. Coupons
welded and inspected at minimum start of work, every ____hours thereafter, or when
the machine is idle for more than ____ minutes, and at the end of work shift. - Answer-4
hours, 30 minutes
______ AIR intake shall be permitted to be drawn from outside, from ducted air, or from
equipment location. - Answer-INSTRUMENT
______ AIR intake shall be only drawn from indoors - Answer-MEDICAL
Hard drawn seamless copper type required for systems operating above 185 psi and
pipe sized over 3 1/8". - Answer-Type K
Vertical riser support every floor not to exceed _______' for copper, or ________' for
pvc. - Answer-15' copper, 10' pvc
A trap seal in category 3 facility shall not be less than _____" deep. - Answer-4"
WAGD designed for operation at vacuum below ____" HgV. - Answer-5" HgV
WAGD if joined to vacuum shall be connected a minimum of ____' from and vacuum
inlet. - Answer-5'
No drain shall be located within ______' of pad edge. - Answer-8'
A system with nonstandard operating pressures shall be tested at _____psi higher or
lower than other system for verification. - Answer-10 psi
_____ minutes minimum standing pressure test time for verifiers. - Answer-10 minutes
Carbon monoxide alarm alert at ____ppm or higher with a minimum setting of ____ppm.
- Answer-10 ppm alert, 1 ppm minimum setting
Automatic alarms shall restart after a power loss of ____ seconds. - Answer-10 seconds
Vacuum gauges with normal range display, shall indicate "normal" only above _______"
HgV. - Answer-12" HgV
Piping shall be protected against freezing, corrosion, and ________ damage. - Answer-
physical
Underground piping outside buildings shall be installed below local level of frost
penetration, installation procedure to protect piping from physical damage while
backfilled. Minimum backfill cover above pipe shall be 36", except where no potential
surface loads or conditions, cover can be reduced to ____". - Answer-18"
COMPLETE SOLUTIONS
_______ locations for oxygen, nitrous oxide, and mixtures of these gasses shall NOT
communicate with critical care areas, anesthetizing locations where
moderate/deep/general anesthesia are administered, locations storing flammables,
open electric contacts or transformer rooms, flammable/combustible liquid storage tank
rooms, engines, kitchens, and areas with open flames. - Answer-Indoor
Natural ventilation shall be installed in medical gas storage or transfilling areas. It shall
consist of ______ non-closable louvered openings, each having aggregate free open
area of no less than ____ inches squared. Located within 1' of ____________ and 1' of
__________. - Answer-2, 72", floor, ceiling
Mechanical ventilation shall be installed in medical gas storage or transfilling areas IF
natural ventilation can't be provided. It shall provide continous negative pressure. Inlet
shall draw air from within _________' of floor and adjacent to the cylinders/containers.
Exhaust flow rate of at least _______cfm but not more than _______cfm. Dedicated
exhaust system shall NOT be required provided that the system does not connect to
spaces that contain _____________or____________ materials. - Answer-1', 50cfm,
500 cfm, combustible or flammable
Instrument air shall be suffiecient for ______hours normal operation. - Answer-1 hour
Reciprocating compressors for medical air shall be designed to prevent the introduction
of contaminants or liquids into the pipeline by elimating oil anywhere in the compressor
by at least 2 seals creating an area open to atmosphere. This allows direct and
unobstructed visual inspection of the interconnecting shaft through vent and inspection
openings no smaller than ______ shaft diameters in size. - Answer-1.5 times shaft
diameter
GAS cylinder header manifolds consist of 2 equal headers, each with a sufficient
number of gas cylinder connections for _____ days average supply, but not FEWER
than _____ connections. - Answer-1 day supply, 2 connections minimum
Cryogenic LIQUID containers header manifolds consist of 2 equal headers, each having
sufficient number of liquid container connections for _____ days average supply.
Reserve header not having FEWER than _____ connections. - Answer-1 day supply, 3
connections minimum
There shall be ____' minimum fo clearance around storage containers and E.O.S.C. -
Answer-3'
, Gas tungsten arc welding (GTAW) orbital purge using 75% helium/25% argon. Coupons
welded and inspected at minimum start of work, every ____hours thereafter, or when
the machine is idle for more than ____ minutes, and at the end of work shift. - Answer-4
hours, 30 minutes
______ AIR intake shall be permitted to be drawn from outside, from ducted air, or from
equipment location. - Answer-INSTRUMENT
______ AIR intake shall be only drawn from indoors - Answer-MEDICAL
Hard drawn seamless copper type required for systems operating above 185 psi and
pipe sized over 3 1/8". - Answer-Type K
Vertical riser support every floor not to exceed _______' for copper, or ________' for
pvc. - Answer-15' copper, 10' pvc
A trap seal in category 3 facility shall not be less than _____" deep. - Answer-4"
WAGD designed for operation at vacuum below ____" HgV. - Answer-5" HgV
WAGD if joined to vacuum shall be connected a minimum of ____' from and vacuum
inlet. - Answer-5'
No drain shall be located within ______' of pad edge. - Answer-8'
A system with nonstandard operating pressures shall be tested at _____psi higher or
lower than other system for verification. - Answer-10 psi
_____ minutes minimum standing pressure test time for verifiers. - Answer-10 minutes
Carbon monoxide alarm alert at ____ppm or higher with a minimum setting of ____ppm.
- Answer-10 ppm alert, 1 ppm minimum setting
Automatic alarms shall restart after a power loss of ____ seconds. - Answer-10 seconds
Vacuum gauges with normal range display, shall indicate "normal" only above _______"
HgV. - Answer-12" HgV
Piping shall be protected against freezing, corrosion, and ________ damage. - Answer-
physical
Underground piping outside buildings shall be installed below local level of frost
penetration, installation procedure to protect piping from physical damage while
backfilled. Minimum backfill cover above pipe shall be 36", except where no potential
surface loads or conditions, cover can be reduced to ____". - Answer-18"
