MED GAS NFPA 99 WORKSHEET 4 Exam
UPDATED QUESTIONS AND CORRECT
ANSWERS
What sort of treatment shall be permitted before brazing the cut ends of a tube to installed in
medical gas piping systems? - correct answer cut ends shall be rolled smooth or
deburred
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 - correct
answer trisodium phosphate or sodium carbonate
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 - correct answer copper oxide
What is the purpose of using an oxygen analyzer at the pipeline purge prior to brazing? -
correct answer assure that all ambient air has been removed from the pipeline
Standard depth copper fittings for brazing that is mechanically limited to a makeup depth
shall not be less than that established by: - correct answer ansi/asme standard for
brazing
Stainless tube may be joined by any methods except for what? - correct answer brazed
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? - correct answer 300 psi
Which fitting is not permitted for joining vacuum piping? - correct answer non-
removable push-fit
UPDATED QUESTIONS AND CORRECT
ANSWERS
What sort of treatment shall be permitted before brazing the cut ends of a tube to installed in
medical gas piping systems? - correct answer cut ends shall be rolled smooth or
deburred
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 - correct
answer trisodium phosphate or sodium carbonate
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 - correct answer copper oxide
What is the purpose of using an oxygen analyzer at the pipeline purge prior to brazing? -
correct answer assure that all ambient air has been removed from the pipeline
Standard depth copper fittings for brazing that is mechanically limited to a makeup depth
shall not be less than that established by: - correct answer ansi/asme standard for
brazing
Stainless tube may be joined by any methods except for what? - correct answer brazed
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? - correct answer 300 psi
Which fitting is not permitted for joining vacuum piping? - correct answer non-
removable push-fit
