Question 1

When used to control the flow of medical gases to a patient, how is a Thorpe tube classified?

Accepted Answer

A) variable-orifice, constant-pressure flowmeter device 
B) fixed-orifice, constant-pressure flowmeter device 
C) variable-orifice, variable-pressure flowmeter device 
D) fixed-orifice, variable-pressure flowmeter device 
A) variable-orifice, constant-pressure flowmeter device 
B) fixed-orifice, constant-pressure flowmeter device 
C) variable-orifice, variable-pressure flowmeter device 
D) fixed-orifice, variable-pressure flowmeter device A

Question 2

To accurately determine the remaining contents of a liquid-filled CO2 cylinder, what would you do?

Accepted Answer

A) Multiply the pressure by the cylinder factor. 
B) Divide the pressure by the cylinder factor. 
C) Weigh the contents of the cylinder. 
D) Empty the cylinder while timing its flow. 
A) Multiply the pressure by the cylinder factor. 
B) Divide the pressure by the cylinder factor. 
C) Weigh the contents of the cylinder. 
D) Empty the cylinder while timing its flow. C

Question 3

What factors affect the combustion-supporting properties of O2?
I.concentration
II.partial pressure
III.humidity
A.I
B.II
C.I and II
D.I, II, and III

Accepted Answer

Oxygen is nonflammable, but it greatly accelerates combustion. Burning speed increases with either (1) an increase in oxygen percentage at a fixed total pressure or (2) an increase in total pressure of a constant gas concentration. Thus, both oxygen concentration and partial pressure influence the rate of burning.

Question 4

What is the only major factor limiting the use of pressure-compensated Thorpe tube flowmeters?

Accepted Answer

A) downstream resistance 
B) effect of position (gravity) 
C) DISS connector availability 
D) use with gases other than O2 
A) downstream resistance 
B) effect of position (gravity) 
C) DISS connector availability 
D) use with gases other than O2

Question 5

Which of the following is TRUE about an uncompensated Thorpe tube?

Accepted Answer

A) flow lower than actual if downstream pressure increases 
B) fixed-orifice, variable-pressure flowmeter device 
C) flow-control needle valve placed distal to the flow tube 
D) accuracy unaffected by changes in downstream resistance 
A) flow lower than actual if downstream pressure increases 
B) fixed-orifice, variable-pressure flowmeter device 
C) flow-control needle valve placed distal to the flow tube 
D) accuracy unaffected by changes in downstream resistance

Question 6

According to the National Institute of Standards and Technology of the U.S. Department of Commerce, a gas cylinder that is color-coded brown and green should contain which of the following?

Accepted Answer

A) O2-N2 mixture 
B) O2-CO2 mixture 
C) CO2 
D) O2-He mixture 
A) O2-N2 mixture 
B) O2-CO2 mixture 
C) CO2 
D) O2-He mixture

Question 7

What device is used to reduce the pressure and control the flow of a compressed medical gas?

Accepted Answer

A) Bourdon gauge 
B) regulator 
C) flowmeter 
D) reducing valve 
A) Bourdon gauge 
B) regulator 
C) flowmeter 
D) reducing valve

Question 8

A cylinder of N2O has a gauge pressure of 750 psig when full. What will be the pressure in this cylinder when it is half full?

Accepted Answer

A) 375 psig 
B) 750 psig 
C) 1500 psig 
D) 2200 psig 
A) 375 psig 
B) 750 psig 
C) 1500 psig 
D) 2200 psig

Question 9

Which of the following gases is used to treat conditions causing hypoxic respiratory failure?

Accepted Answer

A) N2O 
B) He 
C) NO 
D) cyclopropane 
A) N2O 
B) He 
C) NO 
D) cyclopropane

Question 10

You must connect a large-volume nebulizer to a bedside compressed-air outlet through a flowmeter. You have only standard O2 flowmeters available. Which of the following actions is appropriate?

Accepted Answer

A) Connect the O2 flowmeter to the air outlet with piping tape. 
B) Use an O2-to-air DISS adapter to join the flowmeter and outlet. 
C) Connect the O2 flowmeter to the air outlet with a petroleum jelly seal. 
D) Try to cross-thread an O2 flowmeter directly on the air outlet. 
A) Connect the O2 flowmeter to the air outlet with piping tape. 
B) Use an O2-to-air DISS adapter to join the flowmeter and outlet. 
C) Connect the O2 flowmeter to the air outlet with a petroleum jelly seal. 
D) Try to cross-thread an O2 flowmeter directly on the air outlet.

Question 11

One cu/ft of liquid O2 is the equivalent of about how many cu/ft of gaseous O2?

Accepted Answer

A) 28 
B) 244 
C) 360 
D) 860 
A) 28 
B) 244 
C) 360 
D) 860

Question 12

What is the U.S. Food and Drug Administration (FDA) purity standard for O2?

Accepted Answer

A) 21% 
B) 90% 
C) 95% 
D) 99% 
A) 21% 
B) 90% 
C) 95% 
D) 99%

Question 13

What key property of He makes it useful as a therapeutic gas?

Accepted Answer

A) low solubility 
B) chemical inertness 
C) low cost 
D) low density 
A) low solubility 
B) chemical inertness 
C) low cost 
D) low density

Question 14

Department of Transportation (DOT) regulations require compressed gas cylinders to be hydrostatically tested for leaks and expansion every how often?

Accepted Answer

A) 1 to 2 years 
B) 3 to 5 years 
C) 6 to 8 years 
D) 5 to 10 years 
A) 1 to 2 years 
B) 3 to 5 years 
C) 6 to 8 years 
D) 5 to 10 years

Question 15

Which of the following medical gases support combustion?
I.O2
II.N2O
III.compressed air
IV.CO2

Accepted Answer

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

Question 16

What is the most common and least expensive method for commercial production of O2?

Accepted Answer

A) electrolysis of water 
B) fractional distillation of air 
C) physical separation by molecular sieves 
D) chemical decomposition of sodium chlorate 
A) electrolysis of water 
B) fractional distillation of air 
C) physical separation by molecular sieves 
D) chemical decomposition of sodium chlorate

Question 17

When full, a gas cylinder registers a pressure of 2200 psig. After a few hours of use, the pressure gauge reads 550 psig. The cylinder is now how full?

Accepted Answer

A) one half 
B) one third 
C) one fourth 
D) two thirds 
A) one half 
B) one third 
C) one fourth 
D) two thirds

Question 18

Which of the following statements regarding O2 is false?

Accepted Answer

A) It is only slightly soluble in water. 
B) It is odorless and transparent. 
C) It is flammable. 
D) It is heavier than air. 
A) It is only slightly soluble in water. 
B) It is odorless and transparent. 
C) It is flammable. 
D) It is heavier than air.

Question 19

What is the greatest potential problem with quick-connect DISS systems (such as Ohio, NCG, or Puritan)?

Accepted Answer

A) increased cost of flowmeter equipment 
B) decreased accuracy in flowmeter equipment 
C) difficulty in training new personnel 
D) incompatibility among different manufacturers 
A) increased cost of flowmeter equipment 
B) decreased accuracy in flowmeter equipment 
C) difficulty in training new personnel 
D) incompatibility among different manufacturers

Question 20

Which of the following medical gases can be stored in cylinders as liquids at room temperature?
I.CO2
II.O2
III.N2O

Accepted Answer

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

Exam 37: Storage and Delivery of Medical Gases

When used to control the flow of medical gases to a patient, how is a Thorpe tube classified?

To accurately determine the remaining contents of a liquid-filled CO2 cylinder, what would you do?

What factors affect the combustion-supporting properties of O2? I.concentration II.partial pressure III.humidity A.I B.II C.I and II D.I, II, and III

What is the only major factor limiting the use of pressure-compensated Thorpe tube flowmeters?

Which of the following is TRUE about an uncompensated Thorpe tube?

According to the National Institute of Standards and Technology of the U.S. Department of Commerce, a gas cylinder that is color-coded brown and green should contain which of the following?

What device is used to reduce the pressure and control the flow of a compressed medical gas?

A cylinder of N2O has a gauge pressure of 750 psig when full. What will be the pressure in this cylinder when it is half full?

Which of the following gases is used to treat conditions causing hypoxic respiratory failure?

You must connect a large-volume nebulizer to a bedside compressed-air outlet through a flowmeter. You have only standard O2 flowmeters available. Which of the following actions is appropriate?

One cu/ft of liquid O2 is the equivalent of about how many cu/ft of gaseous O2?

What is the U.S. Food and Drug Administration (FDA) purity standard for O2?

What key property of He makes it useful as a therapeutic gas?

Department of Transportation (DOT) regulations require compressed gas cylinders to be hydrostatically tested for leaks and expansion every how often?

Which of the following medical gases support combustion? I.O2 II.N2O III.compressed air IV.CO2

What is the most common and least expensive method for commercial production of O2?

When full, a gas cylinder registers a pressure of 2200 psig. After a few hours of use, the pressure gauge reads 550 psig. The cylinder is now how full?

Which of the following statements regarding O2 is false?

What is the greatest potential problem with quick-connect DISS systems (such as Ohio, NCG, or Puritan)?

Which of the following medical gases can be stored in cylinders as liquids at room temperature? I.CO2 II.O2 III.N2O

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

Physical Principles of Respiratory Care

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

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

To accurately determine the remaining contents of a liquid-filled CO₂ cylinder, what would you do?

What factors affect the combustion-supporting properties of O₂? I.concentration II.partial pressure III.humidity A.I B.II C.I and II D.I, II, and III

A cylinder of N₂O has a gauge pressure of 750 psig when full. What will be the pressure in this cylinder when it is half full?

You must connect a large-volume nebulizer to a bedside compressed-air outlet through a flowmeter. You have only standard O₂ flowmeters available. Which of the following actions is appropriate?

One cu/ft of liquid O₂is the equivalent of about how many cu/ft of gaseous O₂?

What is the U.S. Food and Drug Administration (FDA) purity standard for O₂?

Which of the following medical gases support combustion? I.O₂ II.N₂O III.compressed air IV.CO₂

What is the most common and least expensive method for commercial production of O₂?

Which of the following statements regarding O₂ is false?

Which of the following medical gases can be stored in cylinders as liquids at room temperature? I.CO₂ II.O₂ III.N₂O