問題一覧
1
Which of the following are considered therapeutic gases?
1. Oxygen (O2)
2. O2-NO mixture
3. O2-He mixture
4. N2O
1, 2, and 3 only
2
What is the fire-risk classification of both N and CO2?
Nonflammable
3
Which of the following medical gases support combustion?
1. O2
2. N2O
3. Compressed air
4. CO2
1, 2, and 3 only
4
Which of the following statements regarding O2 are true?
1. It is only slightly soluble in water.
2. It is odorless and transparent.
3. It is flammable.
4. It is heavier than air.
1, 2, and 4 only
5
What factors affect the combustion-supporting properties of O2?
1. Concentration
2. Partial pressure
3. Humidity
1 and 2 only
6
By what means is O2 for medical use in a hospital most commonly produced?
Fractional distillation
7
What is the most common and least expensive method for commercial production of O2?
Fractional distillation of air
8
What is the U.S. Food and Drug Administration (FDA) purity standard for O2?
99%
9
Which of the following methods of producing O2 is commonly used in the home care setting?
Physical separation
10
Components of a large medical air compressor include which of the following?
1. Drying system
2. Diaphragm or turbine
3. Reservoir tank
4. Pressure-reducing valve
1, 3, and 4 only
11
Air for medical use in a hospital should be which of the following?
1. Particle-free
2. Oil-free
3. Dry
1, 2, and 3
12
Large hospital air compressor systems must be capable of maintaining 50 pounds per square inch gauge (psig) at what flows?
100 L/min
13
Which of the following equipment(s) could be powered by a small diaphragm or turbine air compressor?
1. Small-volume medication nebulizer
2. All-purpose large-volume jet nebulizer
3. Intermittent positive-pressure breathing device
1 only
14
Which of the following statements about CO2 are true?
1. It does not support animal life.
2. It is a flammable gas.
3. It is odorless and colorless.
4. It is heavier than air.
1, 3, and 4 only
15
Which of the following statements about He is false?
It is heavier than air.
16
What key property of He makes it useful as a therapeutic gas?
Low density
17
Which of the following gases is used to treat conditions causing hypoxic respiratory failure?
NO
18
Compressed gas cylinders are manufactured from which of the following?
Seamless steel
19
Department of Transportation (DOT) regulations require compressed gas cylinders to be hydrostatically tested for leaks and expansion every how often?
5 to 10 years
20
During inspection of the shoulder of a compressed gas cylinder, you note a plus sign (+) next to the test date. This indicates what about the cylinder?
It can be filled to 10% above its service pressure.
21
According to the U.S. Department of Commerce, a gas cylinder that is color coded blue should contain which of the following?
N2O
22
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?
O2-He mixture
23
To prevent this type of accident, all cylinders have high-23. In clinical practice, how is a positive identification made of the contents of a medical gas cylinder?
Reading the cylinder label
24
What is the key difference between small compressed gas cylinders (sizes AA to E) and their larger counterparts (sizes F to K)?
Small gas cylinders use a yoke (not threaded) connector.
25
Which of the following mechanisms do all compressed gas cylinders use to avoid excessively high buildup of cylinder pressure?
Pressure-relief mechanism on the valve stem
26
Which of the following medical gases can be stored in cylinders as liquids at room temperature?
1. CO2
2. O2
3. N2O
1 and 3 only
27
Cylinders of liquid gases are filled according to what specification?
Filling density
28
The measured pressure in a liquid-filled cylinder is equivalent to which of the following?
The pressure of the surface vapor at any given temperature
29
The measured pressure in a gas-filled cylinder is equivalent to which of the following?
The force required to compress its volume within the cylinder.
30
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?
One-fourth
31
What is the usual method of monitoring the remaining contents in a gas-filled cylinder?
Read the pressure gauge.
32
To accurately determine the remaining contents of a liquid-filled CO2 cylinder, what would you do?
Weigh the contents of the cylinder.
33
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?
750 psig
34
Under what conditions will the gauge pressure of a cylinder of N2O accurately represent its contents?
1. When the liquid in the cylinder has completely vaporized
2. When the ambient temperature exceeds the critical temperature
3. When the filling density is less than 1.0 (water-filled)
2 only
35
When using a Bourdon gauge against high outflow resistance, what will the flowmeter reading show?
Exceed actual flow
36
What cylinder factor is used to compute the duration of flow for a 244 cu/ft (H/K) O2 or air cylinder?
3.14
37
What cylinder factor is used to compute the duration of flow for a 22 cu/ft O2 or air E cylinder?
0.28
38
The gauge on an H cylinder of O2 reads 2000 psig. Approximately how long would the contents of this cylinder last, until completely empty, at a flow of 6 L/min?
17 hr 30 min
39
The gauge on a G cylinder of O2 reads 400 psig. Approximately how long would the contents of this cylinder last, until completely empty, at a flow of 5 L/min?
3 hr 10 min
40
The gauge on an E cylinder of O2 reads 800 psig. Approximately how long would the contents of this cylinder last, until completely empty, at a flow of 3 L/min?
1 hr 15 min
41
You are planning a patient transport that will take approximately 1 hr. The patient requires manual ventilation with 10 L/min of O2. What is the minimum number of full E cylinders you would take with you?
2
42
One cu/ft of liquid O2 is the equivalent to approximately how many cu/ft of gaseous O2?
860
43
During inspection of the shoulder of a compressed gas cylinder, you note an asterisk (*) next to the test date. This indicates what about the cylinder?
It only requires a 10-year DOT testing.
44
Which of the following components are common to a standard compressed gas cylinder manifold system?
1. Automatic switch-over control
2. Pressure-reducing valves
3. Primary and reserve bank
4. Alarm system
1, 2, 3, and 4
45
Unlike CO2 or N2O, O2 cannot be stored as a liquid at room temperature but must be kept in special cryogenic containers. Why is this so?
O2 has a critical temperature well below room temperature.
46
What do the components of a liquid O2 bulk storage tank include?
1. Inner and outer steel shells, separated by a vacuum
2. Safety system that vents O2 if warming occurs
3. Vaporizer system that converts liquid O2 to gas
4. Pressure-reducing valves to lower pressure to 50 psig
1, 2, 3, and 4
47
The NFPA standard for bulk liquid O2 systems requires that the reserve supply be which of the following?
Equal to the average gas use of 1 day
48
Structural requirements for the central piping systems that are used in hospitals to distribute gases are established by whom?
National Fire Protection Association (NFPA)
49
The pressure of O2 or air in a bulk supply system is reduced to what standard working pressure?
50 psig
50
Why are zone valves incorporated into a hospital’s central gas piping systems?
1. To terminate O2 delivery to an area in case of fire
2. To allow selective maintenance without shutting the system down
3. To allow variable pressure reduction throughout the system
1 and 2 only
51
What is the primary purpose of indexed connector systems?
To prevent inadvertent misconnections between equipment
52
What is the indexed safety system for threaded high-pressure connections between large compressed gas cylinders and their attachments?
American Standard Safety System (ASSS)
53
Which of the following are true about ASSS standards?
1. They provide specifications for more than 60 gases and mixtures.
2. They apply only to cylinders sizes F through H/K.
3. They apply to high-pressure connections.
4. They provide a separate connector for all gases.
1, 2, and 3 only
54
Which of the following statements is FALSE about PISS standards?
The exact positions of pins and pinholes do not vary for each gas.
55
What is the pin index hole position for O2?
2 and 5
56
What safety system is designed to prevent accidental interchanging among low-pressure (<200 psig) connectors such as those found on flowmeters and ventilators?
DISS
57
Where do respiratory therapists typically find DISS connections?
1. At the outlets of pressure-reducing valves attached to cylinders
2. At the nurse station
3. At the station outlets of central piping systems
4. At the inlets of blenders, flowmeters, ventilators, and other pneumatic equipments
1, 3, and 4 only
58
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?
Use an O2-to-air DISS adapter to join the flowmeter and outlet.
59
What is the greatest potential problem with quick-connect DISS systems?
Incompatibility among different manufacturers
60
Which device is used to reduce the pressure and control the flow of a compressed medical gas?
Regulator
61
Helium must always be combined with at least how much O2?
20%
62
If you have to deliver medical gas to a patient from a compressed gas cylinder, which of the following devices would you select to control gas flow?
Flowmeter
63
A very common application of the adjustable pressure-reducing valve is in combination with which of the following?
Bourdon gauge
64
How can one determine whether a pressure-reducing valve uses multiple stages for pressure reduction?
By noting the number of pressure relief vents
65
When minimal fluctuations in pressure and flow are critical factors, which of the following pressure-reducing valves would be the best choice?
Multiple-stage pressure-reducing valve
66
To clean a cylinder valve outlet of foreign material, what should you do?
Quickly open and then close the valve.
67
When used to control the flow of medical gases to a patient, how is a flow restrictor classified?
Fixed-orifice, constant-pressure flowmeter device
68
Which of the following are advantages of using a flow restrictor to control the delivery of medical gases to a patient?
1. Preset metered flow
2. Low cost and simplicity
3. Gravity independence
4. Wide range of utility
1, 2, and 3 only
69
When used to control the flow of medical gases to a patient, how is a Bourdon gauge classified?
Fixed-orifice, variable-pressure flowmeter device
70
You are preparing to conduct a complex transport of a patient receiving O2, and you expect to have to alter O2 flows during the transport. Which of the following devices would best meet your needs?
Bourdon gauge
71
Which of the following are true about a Bourdon gauge?
1. It is always used with an adjustable high-pressure reducing valve.
2. It actually senses pressure but is calibrated to display flow.
3. It reads a flow higher than actual if downstream pressure increases.
4. It will register zero flow when the outlet is completely blocked.
1, 2, and 3 only
72
If you have to deliver O2 to a patient directly from a bedside outlet station, which of the following devices would you select?
Thorpe tube flowmeter
73
When used to control the flow of medical gases to a patient, how is a Thorpe tube classified?
Variable-orifice, constant-pressure flowmeter device
74
Which of the following is true about an uncompensated Thorpe tube?
Flow lower than actual if downstream pressure increases
75
Which of the following is false about a compensated Thorpe tube?
Calibrated in liters per minute at atmospheric pressure
76
Which of the following devices would you select if the goal was to accurately meter the flow through a jet nebulizer?
Compensated Thorpe tube
77
What is the only major factor limiting the use of pressure-compensated Thorpe tube flowmeters?
Effect of position (gravity)
78
You are called by a nursing home to help set up O2 for a patient, delivered through a jet nebulizer. Unfortunately, all that is available is an old uncompensated Thorpe tube flowmeter. When set to 8 L/min, the nebulizer creates an additional 30 psig of downstream pressure. Approximately what flow of O2 will the patient now receive?
12 L/min
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47問 • 2年前問題一覧
1
Which of the following are considered therapeutic gases?
1. Oxygen (O2)
2. O2-NO mixture
3. O2-He mixture
4. N2O
1, 2, and 3 only
2
What is the fire-risk classification of both N and CO2?
Nonflammable
3
Which of the following medical gases support combustion?
1. O2
2. N2O
3. Compressed air
4. CO2
1, 2, and 3 only
4
Which of the following statements regarding O2 are true?
1. It is only slightly soluble in water.
2. It is odorless and transparent.
3. It is flammable.
4. It is heavier than air.
1, 2, and 4 only
5
What factors affect the combustion-supporting properties of O2?
1. Concentration
2. Partial pressure
3. Humidity
1 and 2 only
6
By what means is O2 for medical use in a hospital most commonly produced?
Fractional distillation
7
What is the most common and least expensive method for commercial production of O2?
Fractional distillation of air
8
What is the U.S. Food and Drug Administration (FDA) purity standard for O2?
99%
9
Which of the following methods of producing O2 is commonly used in the home care setting?
Physical separation
10
Components of a large medical air compressor include which of the following?
1. Drying system
2. Diaphragm or turbine
3. Reservoir tank
4. Pressure-reducing valve
1, 3, and 4 only
11
Air for medical use in a hospital should be which of the following?
1. Particle-free
2. Oil-free
3. Dry
1, 2, and 3
12
Large hospital air compressor systems must be capable of maintaining 50 pounds per square inch gauge (psig) at what flows?
100 L/min
13
Which of the following equipment(s) could be powered by a small diaphragm or turbine air compressor?
1. Small-volume medication nebulizer
2. All-purpose large-volume jet nebulizer
3. Intermittent positive-pressure breathing device
1 only
14
Which of the following statements about CO2 are true?
1. It does not support animal life.
2. It is a flammable gas.
3. It is odorless and colorless.
4. It is heavier than air.
1, 3, and 4 only
15
Which of the following statements about He is false?
It is heavier than air.
16
What key property of He makes it useful as a therapeutic gas?
Low density
17
Which of the following gases is used to treat conditions causing hypoxic respiratory failure?
NO
18
Compressed gas cylinders are manufactured from which of the following?
Seamless steel
19
Department of Transportation (DOT) regulations require compressed gas cylinders to be hydrostatically tested for leaks and expansion every how often?
5 to 10 years
20
During inspection of the shoulder of a compressed gas cylinder, you note a plus sign (+) next to the test date. This indicates what about the cylinder?
It can be filled to 10% above its service pressure.
21
According to the U.S. Department of Commerce, a gas cylinder that is color coded blue should contain which of the following?
N2O
22
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?
O2-He mixture
23
To prevent this type of accident, all cylinders have high-23. In clinical practice, how is a positive identification made of the contents of a medical gas cylinder?
Reading the cylinder label
24
What is the key difference between small compressed gas cylinders (sizes AA to E) and their larger counterparts (sizes F to K)?
Small gas cylinders use a yoke (not threaded) connector.
25
Which of the following mechanisms do all compressed gas cylinders use to avoid excessively high buildup of cylinder pressure?
Pressure-relief mechanism on the valve stem
26
Which of the following medical gases can be stored in cylinders as liquids at room temperature?
1. CO2
2. O2
3. N2O
1 and 3 only
27
Cylinders of liquid gases are filled according to what specification?
Filling density
28
The measured pressure in a liquid-filled cylinder is equivalent to which of the following?
The pressure of the surface vapor at any given temperature
29
The measured pressure in a gas-filled cylinder is equivalent to which of the following?
The force required to compress its volume within the cylinder.
30
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?
One-fourth
31
What is the usual method of monitoring the remaining contents in a gas-filled cylinder?
Read the pressure gauge.
32
To accurately determine the remaining contents of a liquid-filled CO2 cylinder, what would you do?
Weigh the contents of the cylinder.
33
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?
750 psig
34
Under what conditions will the gauge pressure of a cylinder of N2O accurately represent its contents?
1. When the liquid in the cylinder has completely vaporized
2. When the ambient temperature exceeds the critical temperature
3. When the filling density is less than 1.0 (water-filled)
2 only
35
When using a Bourdon gauge against high outflow resistance, what will the flowmeter reading show?
Exceed actual flow
36
What cylinder factor is used to compute the duration of flow for a 244 cu/ft (H/K) O2 or air cylinder?
3.14
37
What cylinder factor is used to compute the duration of flow for a 22 cu/ft O2 or air E cylinder?
0.28
38
The gauge on an H cylinder of O2 reads 2000 psig. Approximately how long would the contents of this cylinder last, until completely empty, at a flow of 6 L/min?
17 hr 30 min
39
The gauge on a G cylinder of O2 reads 400 psig. Approximately how long would the contents of this cylinder last, until completely empty, at a flow of 5 L/min?
3 hr 10 min
40
The gauge on an E cylinder of O2 reads 800 psig. Approximately how long would the contents of this cylinder last, until completely empty, at a flow of 3 L/min?
1 hr 15 min
41
You are planning a patient transport that will take approximately 1 hr. The patient requires manual ventilation with 10 L/min of O2. What is the minimum number of full E cylinders you would take with you?
2
42
One cu/ft of liquid O2 is the equivalent to approximately how many cu/ft of gaseous O2?
860
43
During inspection of the shoulder of a compressed gas cylinder, you note an asterisk (*) next to the test date. This indicates what about the cylinder?
It only requires a 10-year DOT testing.
44
Which of the following components are common to a standard compressed gas cylinder manifold system?
1. Automatic switch-over control
2. Pressure-reducing valves
3. Primary and reserve bank
4. Alarm system
1, 2, 3, and 4
45
Unlike CO2 or N2O, O2 cannot be stored as a liquid at room temperature but must be kept in special cryogenic containers. Why is this so?
O2 has a critical temperature well below room temperature.
46
What do the components of a liquid O2 bulk storage tank include?
1. Inner and outer steel shells, separated by a vacuum
2. Safety system that vents O2 if warming occurs
3. Vaporizer system that converts liquid O2 to gas
4. Pressure-reducing valves to lower pressure to 50 psig
1, 2, 3, and 4
47
The NFPA standard for bulk liquid O2 systems requires that the reserve supply be which of the following?
Equal to the average gas use of 1 day
48
Structural requirements for the central piping systems that are used in hospitals to distribute gases are established by whom?
National Fire Protection Association (NFPA)
49
The pressure of O2 or air in a bulk supply system is reduced to what standard working pressure?
50 psig
50
Why are zone valves incorporated into a hospital’s central gas piping systems?
1. To terminate O2 delivery to an area in case of fire
2. To allow selective maintenance without shutting the system down
3. To allow variable pressure reduction throughout the system
1 and 2 only
51
What is the primary purpose of indexed connector systems?
To prevent inadvertent misconnections between equipment
52
What is the indexed safety system for threaded high-pressure connections between large compressed gas cylinders and their attachments?
American Standard Safety System (ASSS)
53
Which of the following are true about ASSS standards?
1. They provide specifications for more than 60 gases and mixtures.
2. They apply only to cylinders sizes F through H/K.
3. They apply to high-pressure connections.
4. They provide a separate connector for all gases.
1, 2, and 3 only
54
Which of the following statements is FALSE about PISS standards?
The exact positions of pins and pinholes do not vary for each gas.
55
What is the pin index hole position for O2?
2 and 5
56
What safety system is designed to prevent accidental interchanging among low-pressure (<200 psig) connectors such as those found on flowmeters and ventilators?
DISS
57
Where do respiratory therapists typically find DISS connections?
1. At the outlets of pressure-reducing valves attached to cylinders
2. At the nurse station
3. At the station outlets of central piping systems
4. At the inlets of blenders, flowmeters, ventilators, and other pneumatic equipments
1, 3, and 4 only
58
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?
Use an O2-to-air DISS adapter to join the flowmeter and outlet.
59
What is the greatest potential problem with quick-connect DISS systems?
Incompatibility among different manufacturers
60
Which device is used to reduce the pressure and control the flow of a compressed medical gas?
Regulator
61
Helium must always be combined with at least how much O2?
20%
62
If you have to deliver medical gas to a patient from a compressed gas cylinder, which of the following devices would you select to control gas flow?
Flowmeter
63
A very common application of the adjustable pressure-reducing valve is in combination with which of the following?
Bourdon gauge
64
How can one determine whether a pressure-reducing valve uses multiple stages for pressure reduction?
By noting the number of pressure relief vents
65
When minimal fluctuations in pressure and flow are critical factors, which of the following pressure-reducing valves would be the best choice?
Multiple-stage pressure-reducing valve
66
To clean a cylinder valve outlet of foreign material, what should you do?
Quickly open and then close the valve.
67
When used to control the flow of medical gases to a patient, how is a flow restrictor classified?
Fixed-orifice, constant-pressure flowmeter device
68
Which of the following are advantages of using a flow restrictor to control the delivery of medical gases to a patient?
1. Preset metered flow
2. Low cost and simplicity
3. Gravity independence
4. Wide range of utility
1, 2, and 3 only
69
When used to control the flow of medical gases to a patient, how is a Bourdon gauge classified?
Fixed-orifice, variable-pressure flowmeter device
70
You are preparing to conduct a complex transport of a patient receiving O2, and you expect to have to alter O2 flows during the transport. Which of the following devices would best meet your needs?
Bourdon gauge
71
Which of the following are true about a Bourdon gauge?
1. It is always used with an adjustable high-pressure reducing valve.
2. It actually senses pressure but is calibrated to display flow.
3. It reads a flow higher than actual if downstream pressure increases.
4. It will register zero flow when the outlet is completely blocked.
1, 2, and 3 only
72
If you have to deliver O2 to a patient directly from a bedside outlet station, which of the following devices would you select?
Thorpe tube flowmeter
73
When used to control the flow of medical gases to a patient, how is a Thorpe tube classified?
Variable-orifice, constant-pressure flowmeter device
74
Which of the following is true about an uncompensated Thorpe tube?
Flow lower than actual if downstream pressure increases
75
Which of the following is false about a compensated Thorpe tube?
Calibrated in liters per minute at atmospheric pressure
76
Which of the following devices would you select if the goal was to accurately meter the flow through a jet nebulizer?
Compensated Thorpe tube
77
What is the only major factor limiting the use of pressure-compensated Thorpe tube flowmeters?
Effect of position (gravity)
78
You are called by a nursing home to help set up O2 for a patient, delivered through a jet nebulizer. Unfortunately, all that is available is an old uncompensated Thorpe tube flowmeter. When set to 8 L/min, the nebulizer creates an additional 30 psig of downstream pressure. Approximately what flow of O2 will the patient now receive?
12 L/min