Question 1

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

Accepted Answer

A) 7% 
B) 16% 
C) 24% 
D) 32% 
A) 7% 
B) 16% 
C) 24% 
D) 32% D

Question 2

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?

Accepted Answer

A) CO2 diffuses more rapidly than O2. 
B) CO2 is more soluble in plasma than O2. 
C) CO2 has a greater molecular weight than O2. 
D) O2 has less affinity for plasma than CO2. 
A) CO2 diffuses more rapidly than O2. 
B) CO2 is more soluble in plasma than O2. 
C) CO2 has a greater molecular weight than O2. 
D) O2 has less affinity for plasma than CO2. B

Question 3

Which of the following are true of the behavior of gases at very low temperatures or very high pressures?
I.The actual volume of the gas molecules becomes important.
II.Intermolecular attractive forces have greater impact.
III.Gases begin to deviate from their "ideal" behavior.

Accepted Answer

A) I, II, and III 
B) I and II 
C) I and III 
D) II and III 
A) I, II, and III 
B) I and II 
C) I and III 
D) II and III A

Question 4

With all else equal, under which of the following conditions would the drop in pressure occurring while a fluid flows through a tube be greatest? $\begin{array}{lll}
~~~~~~~{Tube}&{ Diameter}& {Fluid~ Viscosity }\
\hline
\text { A. A } & \text { Small } & \text { Low } \
\text { B. B } & \text { Large } & \text { Low } \
\text { C. C } & \text { Large } & \text { High } \
\text { D. D } & \text { Small } & \text { High }
\end{array}$

Accepted Answer

The answer of With all else equal, under which of...

Question 5

What is the primary means by which heat transfer occurs in fluids?

Accepted Answer

A) convection 
B) radiation 
C) conduction 
D) evaporation 
A) convection 
B) radiation 
C) conduction 
D) evaporation

Question 6

Which of the following statements correctly describe(s) gases?
I.Gases exhibit the phenomenon of flow.
II.Molecular forces of attraction are minimal.
III.Gases are easily compressible.
IV.Gases expand to fill their container.

Accepted Answer

A) I and II 
B) I, II, and III 
C) II, III, and IV 
D) I, II, III, and IV 
A) I and II 
B) I, II, and III 
C) II, III, and IV 
D) I, II, III, and IV

Question 7

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

Accepted Answer

A) pound (lb) 
B) gram (g) 
C) ounce (oz) 
D) mole (mol) 
A) pound (lb) 
B) gram (g) 
C) ounce (oz) 
D) mole (mol)

Question 8

The American National Standards Institute has set a water vapor content level of 30 mg/L as the minimum absolute humidity required for patients whose upper airways have been bypassed. This equals what body humidity (BH)?

Accepted Answer

A) 68% 
B) 47% 
C) 75% 
D) 100% 
A) 68% 
B) 47% 
C) 75% 
D) 100%

Question 9

Which of the following occurs when the temperature of a gas rises?
I.The kinetic activity of the gas increases.
II.The rate of molecular collisions increases.
III.The pressure exerted by the gas rises.

Accepted Answer

A) I, II, and III 
B) I and II 
C) II and III 
D) III 
A) I, II, and III 
B) I and II 
C) II and III 
D) III

Question 10

What occurs when the temperature of a saturated gas drops down to its dew point?

Accepted Answer

A) Excess water vapor will condense as visible droplets. 
B) The temperature of the surrounding air decreases. 
C) Any liquid water present will quickly evaporate. 
D) The relative humidity of the gas begins to decrease. 
A) Excess water vapor will condense as visible droplets. 
B) The temperature of the surrounding air decreases. 
C) Any liquid water present will quickly evaporate. 
D) The relative humidity of the gas begins to decrease.

Question 11

What is the physical process whereby atoms or molecules tend to move from an area of higher concentration or pressure to an area of lower concentration or pressure?

Accepted Answer

A) sublimation 
B) melting 
C) diffusion 
D) capillary action 
A) sublimation 
B) melting 
C) diffusion 
D) capillary action

Question 12

Which of the following best describes the physical concept of pressure?

Accepted Answer

A) weight / unit volume 
B) mass * acceleration 
C) force* distance 
D) force/ unit area 
A) weight / unit volume 
B) mass * acceleration 
C) force* distance 
D) force/ unit area

Question 13

What term is used for the transfer of heat by the direct interaction of atoms or molecules in a hot area with atoms or molecules in a cooler area?

Accepted Answer

A) radiation 
B) convection 
C) condensation 
D) conduction 
A) radiation 
B) convection 
C) condensation 
D) conduction

Question 14

What is the absolute humidity (water vapor content) of saturated gas at normal body temperature (37°C)?

Accepted Answer

A) 47.0 mg/L 
B) 37.0 mg/L 
C) 98.6 mg/L 
D) 43.8 mg/L 
A) 47.0 mg/L 
B) 37.0 mg/L 
C) 98.6 mg/L 
D) 43.8 mg/L

Question 15

Which of the following would be the worst heat conductor?

Accepted Answer

A) water 
B) glass 
C) air 
D) copper 
A) water 
B) glass 
C) air 
D) copper

Question 16

During some pulmonary function tests, saturated gas exhaled from a patient's lungs is gathered at room temperature. Which of the following correction-factor tables would you use to determine what volume this gas occupied in the patient's lungs?

Accepted Answer

A) standard temperature, standard pressure, dry (STP
D)  to body temperature, ambient pressure, saturated (BTPS) 
B) BTPS to STPD 
C) ambient temperature, ambient pressure, saturated (ATPS) to BTPS 
D) ATPS to STPD 
A) standard temperature, standard pressure, dry (STP
D)  to body temperature, ambient pressure, saturated (BTPS) 
B) BTPS to STPD 
C) ambient temperature, ambient pressure, saturated (ATPS) to BTPS 
D) ATPS to STPD

Question 17

By which of the following means can the internal energy of a substance be increased?
I.cooling the substance
II.performing work on the substance
III.heating the substance

Accepted Answer

A) II and III 
B) I and II 
C) II 
D) I, II, and III 
A) II and III 
B) I and II 
C) II 
D) I, II, and III

Question 18

What is the term for the temperature at which the water vapor in a gas begins to condense back into a liquid?

Accepted Answer

A) triple point 
B) critical pressure 
C) dew point 
D) boiling point 
A) triple point 
B) critical pressure 
C) dew point 
D) boiling point

Question 19

Which of the following is/are TRUE about boiling?
I.Boiling a liquid requires more energy than does evaporating it.
II.A liquid's boiling point varies with the atmospheric pressure.
III.The greater the ambient pressure, the lower is the boiling point.

Accepted Answer

A) II and III 
B) I and III 
C) I and II 
D) I, II, and III 
A) II and III 
B) I and III 
C) I and II 
D) I, II, and III

Question 20

What occurs during the evaporation of water?

Accepted Answer

A) The adjacent air is warmed. 
B) The adjacent air is cooled. 
C) The water temperature rises. 
D) Heat is given up to the air. 
A) The adjacent air is warmed. 
B) The adjacent air is cooled. 
C) The water temperature rises. 
D) Heat is given up to the air.

Exam 6: Physical Principles of Respiratory Care

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

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?

Which of the following are true of the behavior of gases at very low temperatures or very high pressures? I.The actual volume of the gas molecules becomes important. II.Intermolecular attractive forces have greater impact. III.Gases begin to deviate from their "ideal" behavior.

What is the primary means by which heat transfer occurs in fluids?

Which of the following statements correctly describe(s) gases? I.Gases exhibit the phenomenon of flow. II.Molecular forces of attraction are minimal. III.Gases are easily compressible. IV.Gases expand to fill their container.

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

The American National Standards Institute has set a water vapor content level of 30 mg/L as the minimum absolute humidity required for patients whose upper airways have been bypassed. This equals what body humidity (BH)?

Which of the following occurs when the temperature of a gas rises? I.The kinetic activity of the gas increases. II.The rate of molecular collisions increases. III.The pressure exerted by the gas rises.

What occurs when the temperature of a saturated gas drops down to its dew point?

What is the physical process whereby atoms or molecules tend to move from an area of higher concentration or pressure to an area of lower concentration or pressure?

Which of the following best describes the physical concept of pressure?

What term is used for the transfer of heat by the direct interaction of atoms or molecules in a hot area with atoms or molecules in a cooler area?

What is the absolute humidity (water vapor content) of saturated gas at normal body temperature (37°C)?

Which of the following would be the worst heat conductor?

During some pulmonary function tests, saturated gas exhaled from a patient's lungs is gathered at room temperature. Which of the following correction-factor tables would you use to determine what volume this gas occupied in the patient's lungs?

By which of the following means can the internal energy of a substance be increased? I.cooling the substance II.performing work on the substance III.heating the substance

What is the term for the temperature at which the water vapor in a gas begins to condense back into a liquid?

Which of the following is/are TRUE about boiling? I.Boiling a liquid requires more energy than does evaporating it. II.A liquid's boiling point varies with the atmospheric pressure. III.The greater the ambient pressure, the lower is the boiling point.

What occurs during the evaporation of water?

History of Respiratory Care

Quality and Evidence-Based Respiratory Care

Patient Safety, Communication, and Record Keeping

Principles of Infection Control

Ethical and Legal Implications of Practice

Computer Applications in Respiratory Care

The Respiratory System

The Cardiovascular System

Ventilation

Gas Exchange and Transport

Solutions, Body Fluids, and Electrolytes

Acid-Base Balance

Regulation of Breathing

Bedside Assessment of the Patient

Interpretation of Clinical Laboratory Data

Interpreting the Electrocardiogram

Analysis and Monitoring of Gas Exchange

Pulmonary Function Testing

A Review of Thoracic Imaging

Nutrition Assessment

Pulmonary Infections

Obstructive Lung Disease: Copd, Asthma, and Related Diseases

Interstitial Lung Disease

Pleural Diseases

Pulmonary Vascular Disease

Acute Lung Injury, Pulmonary Edema, and Multiple System Organ

Lung Cancer

Neuromuscular and Other Diseases of the Chest Wall

Disorders of Sleep

Neonatal and Pediatric Respiratory Disorders

Airway Pharmacology

Airway Management

Emergency Cardiovascular Life Support

Humidity and Bland Aerosol Therapy

Aerosol Drug Therapy

Storage and Delivery of Medical Gases

Medical Gas Therapy

Lung Expansion Therapy

Bronchial Hygiene Therapy

Respiratory Failure and the Need for Ventilatory Support

Mechanical Ventilators

Physiology of Ventilatory Support

Initiating and Adjusting Ventilatory Support

Noninvasive Positive Pressure Ventilation

Monitoring and Management of the Patient in the Intensive Care Unit

Discontinuing Ventilatory Support

Neonatal and Pediatric Respiratory Care

Patient Education and Health Promotion

Cardiopulmonary Rehabilitation

Respiratory Care in Alternative Settings

Filters

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?

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