Exam 6: Physical Principles of Respiratory Care

At 37° C and 760 mm Hg pressure, 0.023 ml of O₂ can be dissolved in 1 ml of plasma, whereas at the same temperature and pressure, 0.510 ml of CO₂ will dissolve in 1 ml of plasma. What explains this difference?

For every liquid there is a temperature above which the kinetic activity of its molecules is so great that the attractive forces cannot keep them in a liquid state. This temperature is called the:

For which of the following purposes might a Venturi tube be used? 1) To restore fluid pressure distal to a restricted orifice 2) To help keep entrainment ratios constant with varying flows 3) To make possible entrainment of large volumes of gas

Which of the following is a good clinical example of using the principle of convection to transfer heat?

The peak pressure on a ventilator reads 30 cm H₂O. What is the equivalent pressure in kilopascals (kPa)?

Which of the following properties of gases distinguish them from liquids-that is, are unique to the gaseous phase of matter? 1) Gases fill the available space. 2) Gases exhibit viscosity. 3) Gases exert pressure. 4) Gases are readily compressed.

What is the pattern of flow in which a fluid moves in discrete cylindrical streamlines?

According to Bernoulli's principle, as a fluid flows through a narrow passage or stricture, which of the following will occur? 1) Fluid velocity will decrease. 2) Lateral pressure will fall. 3) Total energy will increase.

A patient has a recorded body temperature of 106° F. What is this temperature in degrees Celsius?

What is the term for the actual content or weight of water present in a given volume of air?

What are the forms of vaporization? 1) Boiling 2) Freezing 3) Evaporation 4) Sublimation

If the absolute humidity in a medical gas being delivered to a patient is 14 mg/L, then what is the body humidity (BH)?

When the water vapor content of a volume of gas equals its capacity, what is the relative humidity (RH) of this gas?

A near-drowning patient has a recorded body temperature of 30° C. What is the equivalent temperature in degrees Fahrenheit?

If a given mass of a gas is maintained at a constant temperature, what will decreasing its pressure do?

In International System (SI) units, what is any quantity of matter that contains 6.023 $\times$ 10²³ atoms, molecules, or ions?

What is the physical process whereby the gaseous form of a substance is changed back into its liquid state?

Which of the following will occur when a gas undergoes expansion? 1) The pressure of the gas increases. 2) Molecular collisions decrease. 3) The gas temperature increases.

At what temperature do all kinetic activities of matter cease?

Which of the following statements correctly describe gases? 1) Gases exhibit the phenomenon of flow. 2) Molecular forces of attraction are minimal. 3) Gases are difficult to compress. 4) Gases expand to fill their container.