Med gas Refresher EXAM STUDY GUIDE
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
A local alarm shall activate alarm panels when the dew point on instrument air
systems pressure exceeds ______________ indicating high dew point. - ANSWER
-22° F
Each brazed joint shall be - ANSWER visually examined after the cleaning of the
outside of the joint
Medical air central supply systems shall include air dryer(s) that maintains a
maximum dew point of _________ to 50-55 psi at any level of demand. -
ANSWER 32° F
Instrument air shall be dry to a dew point of - ANSWER -40° F
A building or portion thereof used to provide services or treatment simultaneously
to four or more patients on an outpatient basis, where the patients are incapable of
taking action for self-preservation under emergency conditions without the
assistance of others is a - ANSWER ambulatory health care center
, During the outlet flow test, nitrogen outlets shall deliver __________ SCFM with
a pressure drop of no more than 5 psi gage and a static pressure of 160 - 180 psi. -
ANSWER 5.0
The reserve supply manifold of high pressure cylinders shall consist of
____________ connections. - ANSWER three or more
Piping underground within buildings or embedded in concrete floors or walls shall
be installed in a - ANSWER continuous conduit
A building or portion of a building used on a 24 hour basis for the housing of four
or more persons who because of mental or physical incapacity, might be unable to
provide for their own needs and safety without the assistance of another person, is
a - ANSWER nursing home
For each positive-pressure gas system, the cleanliness of the piping system shall
be verified by a piping particulate test. The gas shall be filtered and shall accrue no
more than __________ of matter from any outlet tested. - ANSWER 1mg
A unit of pressure measurement with zero pressure as the base or reference
pressure - ANSWER PSIA
A building or portion of a building used for minor treatments under the continuous
supervision of a dental professional and no overnight stays for patients or no 24
hours operations take place is a - ANSWER Dental Office
_________________________________ is an inorganic compound, that exists as
a gas at atmospheric pressure and temperature, possesses a
_________________smell. - ANSWER Nitrous Oxide, Sweet
,PVC dental vacuum piping shall be subjected to a vacuum test of not less than
________ in. gauge HgV. - ANSWER 12 in. Gauge HgV
Manufactured assemblies shall have a flame spread rating of not greater than -
ANSWER 200
Instrument air is designed to have an operating pressure of
____________________ psi gauge - ANSWER 160-185
Flexible connectors of other than all-metal construction that connect manifolds to
the gas distribution piping shall not exceed ______ feet in length and shall not
penetrate walls, floors, ceilings, or partitions. - ANSWER 5ft
Medical air compressors shall be sufficient to serve the peak calculated demand
with the ____________ single compressor out of service. But in no case shall there
be fewer than ______ compressors. - ANSWER Largest, 2
The quality of medical air shall have less than ___________ PPM gaseous
hydrocarbons. - ANSWER 25
Medical air compressor central supply systems shall be equipped to ensure the
delivery of compressed air with a maximum allowable _________ oil. - ANSWER
o.oo
If WAGD is joined to vacuum piping, it shall be connected at a minimum distance
of _________ feet from any vacuum inlet. - ANSWER 5ft
The maximum support spacing for 2 ½" NPS plastic pipe is - ANSWER 5ft
, Who monitors the design, manufacture, and transport of gas cylinders? - ANSWER
Department of Transportation
How often does the Department of Transportation test compressed gas cylinders
for leaks? - ANSWER Every 5-10 years
What is the safety relief valve? - ANSWER designed to vent the gas to the
atmosphere if tank is heated.
Prevent tank pressure from becoming too high and exploding
How do you know how much gas is left in a tank? - ANSWER Look the pressure
gauge to view volume left in tank
What is the cylinder duration equation? - ANSWER PSI x cylinder factor/ O2
flow rate
What is the cylinder factor for E tanks? - ANSWER 0.28
What is the cylinder factor for H tanks? - ANSWER 3.14
When is -500 used for cylinder duration equation? - ANSWER If asked to provide
a safety net
How to we keep tanks safe? - ANSWER -Chain to wall
-No combustible material around
-Away from heat
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
A local alarm shall activate alarm panels when the dew point on instrument air
systems pressure exceeds ______________ indicating high dew point. - ANSWER
-22° F
Each brazed joint shall be - ANSWER visually examined after the cleaning of the
outside of the joint
Medical air central supply systems shall include air dryer(s) that maintains a
maximum dew point of _________ to 50-55 psi at any level of demand. -
ANSWER 32° F
Instrument air shall be dry to a dew point of - ANSWER -40° F
A building or portion thereof used to provide services or treatment simultaneously
to four or more patients on an outpatient basis, where the patients are incapable of
taking action for self-preservation under emergency conditions without the
assistance of others is a - ANSWER ambulatory health care center
, During the outlet flow test, nitrogen outlets shall deliver __________ SCFM with
a pressure drop of no more than 5 psi gage and a static pressure of 160 - 180 psi. -
ANSWER 5.0
The reserve supply manifold of high pressure cylinders shall consist of
____________ connections. - ANSWER three or more
Piping underground within buildings or embedded in concrete floors or walls shall
be installed in a - ANSWER continuous conduit
A building or portion of a building used on a 24 hour basis for the housing of four
or more persons who because of mental or physical incapacity, might be unable to
provide for their own needs and safety without the assistance of another person, is
a - ANSWER nursing home
For each positive-pressure gas system, the cleanliness of the piping system shall
be verified by a piping particulate test. The gas shall be filtered and shall accrue no
more than __________ of matter from any outlet tested. - ANSWER 1mg
A unit of pressure measurement with zero pressure as the base or reference
pressure - ANSWER PSIA
A building or portion of a building used for minor treatments under the continuous
supervision of a dental professional and no overnight stays for patients or no 24
hours operations take place is a - ANSWER Dental Office
_________________________________ is an inorganic compound, that exists as
a gas at atmospheric pressure and temperature, possesses a
_________________smell. - ANSWER Nitrous Oxide, Sweet
,PVC dental vacuum piping shall be subjected to a vacuum test of not less than
________ in. gauge HgV. - ANSWER 12 in. Gauge HgV
Manufactured assemblies shall have a flame spread rating of not greater than -
ANSWER 200
Instrument air is designed to have an operating pressure of
____________________ psi gauge - ANSWER 160-185
Flexible connectors of other than all-metal construction that connect manifolds to
the gas distribution piping shall not exceed ______ feet in length and shall not
penetrate walls, floors, ceilings, or partitions. - ANSWER 5ft
Medical air compressors shall be sufficient to serve the peak calculated demand
with the ____________ single compressor out of service. But in no case shall there
be fewer than ______ compressors. - ANSWER Largest, 2
The quality of medical air shall have less than ___________ PPM gaseous
hydrocarbons. - ANSWER 25
Medical air compressor central supply systems shall be equipped to ensure the
delivery of compressed air with a maximum allowable _________ oil. - ANSWER
o.oo
If WAGD is joined to vacuum piping, it shall be connected at a minimum distance
of _________ feet from any vacuum inlet. - ANSWER 5ft
The maximum support spacing for 2 ½" NPS plastic pipe is - ANSWER 5ft
, Who monitors the design, manufacture, and transport of gas cylinders? - ANSWER
Department of Transportation
How often does the Department of Transportation test compressed gas cylinders
for leaks? - ANSWER Every 5-10 years
What is the safety relief valve? - ANSWER designed to vent the gas to the
atmosphere if tank is heated.
Prevent tank pressure from becoming too high and exploding
How do you know how much gas is left in a tank? - ANSWER Look the pressure
gauge to view volume left in tank
What is the cylinder duration equation? - ANSWER PSI x cylinder factor/ O2
flow rate
What is the cylinder factor for E tanks? - ANSWER 0.28
What is the cylinder factor for H tanks? - ANSWER 3.14
When is -500 used for cylinder duration equation? - ANSWER If asked to provide
a safety net
How to we keep tanks safe? - ANSWER -Chain to wall
-No combustible material around
-Away from heat
