Respiratory therapists must ensure that any oil or dust is cleared from high-pressure medical-gas delivery systems before pressurization. Why is this action needed?
a. Inhaled dust particles can cause pneumo-coniosis.
b. The oil or dust can cause a leak in the sys-tem.
c. Oil or dust does not easily mix with med-ical gases.
d. Adiabatic compression could ignite the oil or dust.
ANS: D
In an adiabatic process, the container is insulated, resulting in no heat transfer into or out from the system. If the volume increases, the internal energy decreases to perform the work and thus the temperature decreases. If the volume is increased the internal energy is also increased, result-ing in a higher temperature.
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