Author Question: Respiratory therapists must ensure that any oil or dust is cleared from high-pressure medical-gas ... (Read 156 times)

Mr3Hunna · **on:** Jul 16, 2018

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.

Question 2

From a bedside capnograph (CO2 measuring device), you obtain a dry gas reading of 5.3 CO2 in a patient's exhaled gas. Given a barometric pressure of 765 mm Hg, what is the partial pressure of CO2 in this patient's exhaled gas?

a. 347 mm Hg
b. 41 mm Hg
c. 164 mm Hg
d. 35 mm Hg

tkempin · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

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.

Answer to Question 2

ANS: B
Dalton's law describes the relationship among the partial pressure and the total pressure in a gas mixture. According to this law, the total pressure of a mixture of gases must equal the sum of the partial pressures of all component gases. Moreover, the principle states that the partial pressure of a component gas must be proportional to its percentage in the mixture.