By J. M. Cairo
(New Edition 2026, All Chapters 1-15)
,Table of Contents
Chapter 01: Basic Physics for the Respiratory Therapist 3
Chapter 02: Principles of Infection Control 28
Chapter 03: Introduction to Ventilators 56
Chapter 04: Manufacture, Storage, and Transport of Medical Gases 91
Chapter 05: Administering Medical Gases: Regulators, Flowmeters, and ControllingDevices 119
Chapter 06: Humidity and Aerosol Therapy 148
Chapter 07: Assessment of Pulmonary Function 173
Chapter 08: Assessment of Cardiovascular Function 205
Chapter 09: Blood Gas Monitoring 306
Chapter 10: Lung Expansion Therapy Devices 335
Chapter 11: Mechanical Ventilators: General-Use Devices 351
Chapter 12: Infant/Pediatric Ventilators 367
Chapter 13: Home-Care, Transport Devices, Alternative Devices 380
Chapter 14: Airway Management Devices and Advanced Cardiac Life Support 395
Chapter 15: Sleep Diagnostics 415
,Chapter 01: Basic Physics for the Respiratory Therapist
MULTIPLE CHOICE
1. Power is a measure of which of the following?
a. Mechanical energy
b. Gravitational potential energy
c. The rate at which work is being performed
d. The rate at which atoms and molecules move
Answer: C
Power is a measure of the rate at which work is being performed. The formula P = W/J, where W = watts and 1
watt is equal to 1 J/s, expresses this. Joules are the international standard for expressing energy and work.
PTS: 1 REF: Page 8
2. When effort produces a change in the position of matter:
a. work is performed.
b. it is known as a joule.
c. mechanical power is created.
d. the law of the conservation of energy is being used.
Answer: A
Work is performed only when effort or outside forces produce a change in the position of matter.
PTS: 1 REF: Page 8
3. The unit used to express the force of 1 newton (N) acting on a 1-kilogram (kg) object to move it 1 meter
(m) is which of the following?
a. Watt c. Kilowatt
b. Joule d. Kinetic energy
Answer: B
One joule is equal to the force of 1 N acting on 1 kg. A watt is equivalent to 1 J/s. A kilowatt is simply 1000 W.
Kinetic energy is energy an object possesses when it is in motion.
PTS: 1 REF: Page 8
4. Power is expressed in which of the following units?
a. Newtons c. Ohms
, b. Joules d. Watts
Answer: D
Power is a measure of the rate at which work is being performed. Energy and work are measured in joules. One
joule is the force of 1 N acting on a 1-kg object to move it 1 m. Ohms is the resistance an electrical circuit
possesses.
PTS: 1 REF: Page 8
5. Four horsepower (hp) is equal to how many kilowatts (kW)?
a. 5.36 c. 2984
b. 2.98 d. 186.5
Answer: B
1 hp = 0.746 kW.
1 hp/0.746 = 4 hp/X.
X = 4 0.476 = 2.98 kW.
PTS: 1 REF: Page 8
6. The energy that an object possesses when it is in motion is called:
a. sound. c. thermal.
b. kinetic.d. potential.
Answer: B
Kinetic energy is the energy an object possesses when it stays in motion. Potential energy is stored energy, and
it exists in many forms such as thermal energy or sound waves.
PTS: 1 REF: Page 9
7. If the velocity of an object is reduced by half, its kinetic energy will be which of the following?
a. Reduced to one eighth c. Reduced twofold
b. Increased twofold d. Not changed
Answer: A
Kinetic energy = (mass of object square of velocity it is traveling, or mv2) or KE = (V V). If the velocity
is reduced by half, then KE = ( V V), or ( ) = reduction.
PTS: 1 REF: Page 10
8. Energy that is stored in an object is called which of the following?
a. Kinetic c. Chemical
b. Potential d. Mechanical