STORAGE & TRANSPORT, MEDICAL
GASES- HANDLING &
CALCULATIONS, & MEDICAL GAS
FLOWS EXAM QUESTIONS AND
ANSWERS
, Who sets the strict specifications of medical gas cylinders - ANSWERStransport canada
what are medical gas cylinders used for? - ANSWERSnon-liquified (gaseous) medical
gas storage and transport
what are medical gas cylinders constructed of? - ANSWERSseamless, high-quality
steel, chrome-molybdenum, or aluminum
what are cylinder requirements - ANSWERS•Must be capable of holding 10% more than
their maximum service pressure (Full cylinder of oxygen - 2200 psi)
what must a cylinder have - ANSWERSa pressure-relief mechanism to prevent
explosion
how often must hydrostatic testing be carried out - ANSWERSevery 10 years (3AA, 3A)
or every 5 years (3AL) to determine expansion characteristics
how is hydrostatic pressure carried out? - ANSWERSA water-filled cylinder is placed in
a chamber (jacket) that contains water
•The cylinder is filled to 167% of the service filling pressure
what happens during hydrostatic testing - ANSWERSAs pressure is applied to the
cylinder, it displaces water from the jacket - the amount of water displaced is equal to
the elastic expansion of the cylinder
during hydrostatic pressure, when pressure is released what is the water that is
displaced equal to - ANSWERS•the permanent elastic expansion of the cylinder
what is cylinder expansion is inversely related to - ANSWERSthe thickness of the
cylinder wall
Thick-walled cylinder - ANSWERSlow expansion
Thin-walled cylinder - ANSWERShigh expansion
cylinder markings - ANSWERS•Type of material
•Service pressure
•Serial number
Manufacturer mark
•Ownership mark
•Expansion factor
•Original hydrostatic test