Question 1

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

Accepted Answer

A) percent body humidity 
B) water vapor pressure 
C) absolute humidity 
D) relative humidity 
A) percent body humidity 
B) water vapor pressure 
C) absolute humidity 
D) relative humidity

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?

Accepted Answer

A) 347 mm Hg 
B) 41 mm Hg 
C) 164 mm Hg 
D) 35 mm Hg 
A) 347 mm Hg 
B) 41 mm Hg 
C) 164 mm Hg 
D) 35 mm Hg

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

A) condensation 
B) sublimation 
C) vaporization 
D) radiation 
A) condensation 
B) sublimation 
C) vaporization 
D) radiation

Question 5

Which of the following represents a direct measure of the kinetic activity of water vapor molecules?

Accepted Answer

A) absolute humidity 
B) water vapor pressure 
C) percent body humidity 
D) relative humidity 
A) absolute humidity 
B) water vapor pressure 
C) percent body humidity 
D) relative humidity

Question 6

Which of the following is FALSE about evaporation?

Accepted Answer

A) Evaporation is a type of vaporization. 
B) The process of evaporation warms the surrounding air. 
C) Evaporation is the change of a liquid substance into a gas. 
D) For evaporation to occur, heat energy is needed. 
A) Evaporation is a type of vaporization. 
B) The process of evaporation warms the surrounding air. 
C) Evaporation is the change of a liquid substance into a gas. 
D) For evaporation to occur, heat energy is needed.

Question 7

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

Accepted Answer

A) 37.0 kPa 
B) 68.0 kPa 
C) 4.9 kPa 
D) 2.9 kPa 
A) 37.0 kPa 
B) 68.0 kPa 
C) 4.9 kPa 
D) 2.9 kPa

Question 8

For which of the following purposes might a Venturi tube be used?
I.to restore fluid pressure distal to a restricted orifice
II.to help keep entrainment ratios constant with varying flows
III.to make possible entrainment of large volumes of gas

Accepted Answer

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

Question 9

Which of the following would help to decrease a patient's loss of body heat?
I.Increase the temperature of the room. 
II.Increase the exposed skin surface area.
III.Move the patient away from cold windows.

Accepted Answer

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

Exam 6: Physical Principles of Respiratory Care

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

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?

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

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

Which of the following represents a direct measure of the kinetic activity of water vapor molecules?

Which of the following is FALSE about evaporation?

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

For which of the following purposes might a Venturi tube be used? I.to restore fluid pressure distal to a restricted orifice II.to help keep entrainment ratios constant with varying flows III.to make possible entrainment of large volumes of gas

Which of the following would help to decrease a patient's loss of body heat? I.Increase the temperature of the room. II.Increase the exposed skin surface area. III.Move the patient away from cold windows.

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

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?

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