MED GAS NFPA 99 WORKSHEET #4 Exam | Verified Exam Questions
and Answers | Latest Updated Study Material 2026
Question:
what sort of treatment shall be permitted before brazing the cut ends of a tube to installed in
medical gas piping systems?
Answer:
cut ends shall be rolled smooth or
deburred
Question:
all fittings for medical gas work shall be kept separate from other tools and kept free of grease or
oil. if cleaned, only a degreaser such as is permitted
Answer:
trisodium phosphate or sodium carbonate
Question:
when brazing, joints shall by continuously purged with oil-free, dry nitrogen NF to prevent the
formation of on the inside surfaces of the joint
Answer:
copper
oxide
Question:
what is the purpose of using an oxygen analyzer at the pipeline purge prior to brazing?
Answer:
assure that all ambient air has been removed from the pipeline
Question:
standard depth copper fittings for brazing that is mechanically limited to a makeup depth shall
NOT be less than that established by:
Answer:
ANSI/ASME standard for
brazing
, Question:
stainless tube may be joined by any methods EXCEPT for what?
Answer:
brazed
Question:
if copper tube in a medical gas system is to be joined using memory metal fittings having a
temperature rating of 1000 degrees F, the fittings must have a pressure rating of NOT less than
how many PSI? so what is the minimum PSI?
Answer:
300 PSI
Question:
which fitting is NOT permitted for joining vacuum piping?
Answer:
Non-
removable push-fit
Question:
NFPA 99 specifies that the medical gas piping system shall be protected against all EXCEPT for
what?
Answer:
any liquids
Question:
which type of copper tube hangers shall be used in a potentially damp location?
Answer:
plastic coated or insulated with a material that will not absorb moisture
Question:
if a nonmetallic flexible connector is being used in a Cat 1 health care facility to connect the
manifold to the gas distribution piping, what is the maximum length (in feet) permitted for the
flexible connector?
Answer:
they shall be no longer than necessary
and Answers | Latest Updated Study Material 2026
Question:
what sort of treatment shall be permitted before brazing the cut ends of a tube to installed in
medical gas piping systems?
Answer:
cut ends shall be rolled smooth or
deburred
Question:
all fittings for medical gas work shall be kept separate from other tools and kept free of grease or
oil. if cleaned, only a degreaser such as is permitted
Answer:
trisodium phosphate or sodium carbonate
Question:
when brazing, joints shall by continuously purged with oil-free, dry nitrogen NF to prevent the
formation of on the inside surfaces of the joint
Answer:
copper
oxide
Question:
what is the purpose of using an oxygen analyzer at the pipeline purge prior to brazing?
Answer:
assure that all ambient air has been removed from the pipeline
Question:
standard depth copper fittings for brazing that is mechanically limited to a makeup depth shall
NOT be less than that established by:
Answer:
ANSI/ASME standard for
brazing
, Question:
stainless tube may be joined by any methods EXCEPT for what?
Answer:
brazed
Question:
if copper tube in a medical gas system is to be joined using memory metal fittings having a
temperature rating of 1000 degrees F, the fittings must have a pressure rating of NOT less than
how many PSI? so what is the minimum PSI?
Answer:
300 PSI
Question:
which fitting is NOT permitted for joining vacuum piping?
Answer:
Non-
removable push-fit
Question:
NFPA 99 specifies that the medical gas piping system shall be protected against all EXCEPT for
what?
Answer:
any liquids
Question:
which type of copper tube hangers shall be used in a potentially damp location?
Answer:
plastic coated or insulated with a material that will not absorb moisture
Question:
if a nonmetallic flexible connector is being used in a Cat 1 health care facility to connect the
manifold to the gas distribution piping, what is the maximum length (in feet) permitted for the
flexible connector?
Answer:
they shall be no longer than necessary
