Deck 3: Manufacture, Storage, and Transport of Medical Gases

Question 1

Which type of cylinder is produced from non-heat-treated carbon-steel?

A) 3
B) 3A
C) 3AA
D) 3AAA

Answer 1

B
3AA means heat-treated,high-strength steel; 3 and 3AAA are not applicable.

Question 2

If the maximum filling pressure is marked as 2050 lb-force per square inch gauge (psig),this cylinder is capable of holding _____ psig.

A) 1845
B) 2050
C) 2255
D) 2460

Answer 2

C
Compressed gas cylinders should be capable of holding up to 10% more than the maximum filling pressure as marked.10% * 2050 = 205 + 2050 = 2255 psig.

Question 3

In high concentrations,which of the following gases is a potent anesthetic?

A) Nitric oxide
B) Nitrous oxide
C) Carbon dioxide
D) Helium-oxygen mixture

Answer 3

B
The major use for nitrous oxide is a central nervous system depressant.As such,it is a potent anesthetic when administered in high concentrations.At very low concentrations (2 to 80 parts per million)combined with oxygen,nitric oxide has been used successfully to treat persistent pulmonary hypertension of the newborn.Carbon dioxide is nonflammable,but it supports combustion.Helium-oxygen mixtures decrease the work of breathing by decreasing turbulent airflow.

Question 4

Safety systems for medical gases are recommended and provided by:

A) DOT.
B) CGA.
C) FDA.
D) National Fire Protection Association (NFPA).

Question 5

Which of the following is not marked on a cylinder?

A) Ownership marks
B) Method of production
C) Serial number of the cylinder
D) Type of material used to construct the cylinder

Question 6

Which size cylinder would be most appropriate for use during patient transport?

A) H
B) G
C) M
D) E

Question 7

The color codes for cylinders are prescribed by the:

A) U.S. National Formulary.
B) CGA.
C) FDA.
D) American Standards Association.

Question 8

Which of the following gases support combustion?
1)Air
2)Oxygen
3)Helium
4)Carbon Dioxide

A) 2 only
B) 1, 2
C) 2, 3
D) 1, 3, 4

Question 9

Which agency is responsible for the regulations that govern the manufacture,storage,and transport of compressed gases?

A) Bureau of Medical Devices
B) Compressed Gas Association (CGA)
C) U.S. Department of Transportation (DOT)
D) U.S. Food and Drug Administration (FDA)

Question 10

Which of the following gases is the least dense?

A) Carbon dioxide
B) Nitrous oxide
C) Helium
D) Air

Question 11

Which of the following gases is used to decrease the work of breathing associated with severe airway obstruction?

A) Nitric oxide
B) Nitrous oxide
C) Helium-oxygen mixture
D) Carbon dioxide-oxygen mixture

Question 12

What is the cylinder color for nitrous oxide?

A) Red
B) Black and white
C) Brown
D) Light blue

Question 13

A plus sign after an examination date indicates that the cylinder:

A) may be retested in 5 years.
B) may be retested in 10 years.
C) has been sold to another company.
D) has complied with the requirements of the test.

Question 14

Which gas has been used successfully in the treatment of pulmonary hypertension of the newborn?

A) Oxygen
B) Nitric oxide
C) Nitrous oxide
D) Helium-oxygen mixture

Question 15

A cylinder has "DOT 3AL 2015" stamped on it.What does the 3AL stand for?

A) Manufacturer's initials
B) Constructed of heat-treated, high-strength steel
C) Required to undergo hydrostatic testing every 3 years
D) Constructed of specially prescribed seamless aluminum alloys

Question 16

Which agency sets purity standards for medical gases?

A) CGA
B) DOT
C) FDA
D) International Standards Organization (ISO)

Question 17

Chemical pneumonitis and pulmonary edema can be caused by which of the following?

A) Nitrous oxide
B) Carbon dioxide
C) Excess amounts of nitric oxide
D) A combination of nitric oxide and nitrogen dioxide

Question 18

Carbon dioxide can be obtained by which of the following methods?

A) Heating uranium ore
B) Combustion of natural gas
C) Fractional distillation of liquid air
D) Oxidizing ammonia at high temperatures

Question 19

An asterisk following the reexamination date on a cylinder indicates that the cylinder:

A) has passed the test.
B) must be retested every 5 years.
C) must be retested every 10 years.
D) has been sold to another company.

Question 20

A cylinder has "DOT 3AA 2015" stamped on it.What does the 3AA stand for?

A) Ownership mark
B) Manufacturer's mark
C) Non-heat-treated carbon-steel
D) Heat-treated, high-strength steel

Question 21

What is the international color code for compressed air?

A) Gray
B) Black
C) Yellow
D) Black and white

Question 22

Medical gas cylinder valve outlets always have connections that are _____-handed and _____.

A) right; external
B) right; internal
C) left; external
D) left; internal

Question 23

What are the pin positions for an "E" size compressed air cylinder?

A) 1 and 5
B) 1 and 6
C) 2 and 5
D) 3 and 5

Question 24

Wood's metal is used to make:

A) gas cylinders.
B) fusible-plug pressure-relief valves.
C) rupture-disk pressure-relief valves.
D) spring-loaded pressure-relief devices.

Question 25

Which agency designed the safety systems for outlet connections of cylinder valves?

A) Z-79 Committee
B) CGA
C) FDA
D) American National Standards Institute (ANSI)

Question 26

Which of the following statement(s)is (are)not true about cylinder valves?
1)Diaphragm valves cannot withstand pressure greater than 1500 psig.
2)Direct-acting valves are used for pressure greater than 1500 psig.
3)Diaphragm valves should not be used with anesthetic gases.
4)Stem leakage can occur with direct-acting valves.

A) 3
B) 2 and 4
C) 1 and 4
D) 1,2,and 3

Question 27

Which type of valve operates on the principle that as the pressure in a cylinder increases,the temperature of the gas increases?

A) Direct-acting valves
B) Fusible-plug pressure-relief valves
C) Rupture-disk pressure-relief valves
D) Spring-loaded pressure-relief valves

Question 28

Which of the following statement(s)is (are)true about cylinder valves?
1)Diaphragm valves can withstand pressure greater than 1500 psig.
2)Direct-acting valves are used for pressure less than 1500 psig.
3)Diaphragm valves should be used with flammable gases.
4)Leakage cannot occur with direct-acting valves.

A) 3
B) 1
C) 2 and 3
D) 1 and 4

Question 29

What are the pin positions for an "E" size oxygen cylinder?

A) 2 and 4
B) 2 and 5
C) 2 and 6
D) 3 and 5

Question 30

Which of the following procedures should be followed in setting up a compressed gas cylinder at a patient's bedside?
1)Inspect the cylinder and valve for dirt,debris,and oil.
2)Make sure the cylinder is properly secured.
3)Tighten the regulator with a pipe wrench.
4)Open the cylinder valve completely.

A) 3 and 4
B) 1 and 2
C) 1,2,3,and 4
D) 1,2,and 4

Question 31

Which of the following appear(s)on the labels of gas cylinders?
1)Chemical symbol of the contents
2)Precautionary measures for the gas
3)Specific hazards related to use of the gas
4)Volume of the cylinder marked in liters at 70° F

A) 1
B) 1 and 4
C) 1,2,and 3
D) 1,2,3,and 4

Question 32

Which safety system is used with small cylinders,sizes "A" through "E"?

A) Pin Index Safety System
B) Diameter Index Safety System
C) Direct-Acting Valve Safety System
D) American Standard Index Safety System

Question 33

The cylinder outlet diameter for a "G" size oxygen cylinder is _____ inches.

A) 0.830
B) 0.903
C) 0.960
D) 0.965

Question 34

Which of the following types of threading does a compressed air cylinder have?
1)Right-handed
2)Left-handed
3)Internal
4)External

A) 2 and 3
B) 1 and 4
C) 2 and 4
D) 1 and 3

Question 35

The diaphragms of a diaphragm type of valve are made of:
1)steel.
2)copper.
3)aluminum.
4)chrome-molybdenum.

A) 2
B) 2 and 3
C) 3 and 4
D) 1 and 2

Question 36

Which agency sets standards for the purity of medical gases?

A) U.S. National Formulary
B) CGA
C) FDA
D) American Standards Association

Question 37

A nitrous oxide "H" size cylinder cannot be attached to oxygen equipment because the nitrous oxide cylinder has which of the following?
1)A different outlet size
2)A different thread type
3)An outer threading system
4)Internal threading; and oxygen has an external threading

A) 1,2,3,and 4
B) 2,3,and 4
C) 2 and 3
D) 1 and 2

Question 38

What is the purity standard for oxygen?

A) 99%
B) 98%
C) 97%
D) 95%

Question 39

Which of the following statement(s)is (are)true about diaphragm type of valves?
1)A partial rotation of a diaphragm type of valve will not open the stem.
2)The valve seat in a diaphragm type of valve does not turn.
3)The diaphragm type of valve contains two fiber washers.
4)The diaphragm type of valve uses a threaded stem.a. 2
B) 1 and 4
C) 3 and 4
D) 2 and 4

Question 40

A 97% purity standard is required for which of the following gases?

A) Ethylene
B) Nitrogen
C) Nitric oxide
D) Nitrous oxide

Question 41

The K cylinder at a patient's bedside contains 1300 psig and is using 7 L/min.It will take approximately _____ hours to use 800 psig.

A) 3.7
B) 9.7
C) 6
D) 4

Question 42

An "E" size oxygen cylinder with 2000 psig in it is being used at 4 L/min.How much will be used in 45 minutes?

A) 26.2 psig
B) 140 psig
C) 180 psig
D) 643 psig

Question 43

The E cylinder on a crash cart contains 900 psig.How long would the cylinder last if used at 10 L/min?

A) 1 hour
B) 25 minutes
C) 3 hours 36 minutes
D) 4 hours 42 minutes

Question 44

The application of Gay-Lussac's law in a bulk liquid oxygen system:

A) accounts for the conversion of the liquid oxygen to gaseous oxygen.
B) allows the reservoir contents to be maintained in the liquid state.
C) keeps the liquid oxygen above its critical temperature.
D) allows the gas to be maintained at 50 psig.

Question 45

The function of the vaporizer of a liquid bulk oxygen system is to:

A) act as a pressure release.
B) reduce the pressure to 50 psig.
C) convert liquid oxygen to gaseous oxygen.
D) allow heat to be released into the environment.

Question 46

Which of the following statements is (are)true with regard to liquid bulk systems?
1)Liquefied oxygen occupies a fraction of the space required for the storage of gaseous oxygen.
2)The CGA regulates the construction of liquid oxygen systems.
3)A bulk oxygen system contains more than 40,000 ft of oxygen.
4)The working pressure of a liquid bulk oxygen system is 50 psig.

A) 2
B) 3 and 4
C) 1 and 3
D) 1 and 4

Question 47

A "G" size cylinder with 2000 psig is used for 6 hours at 5 L/min.How much gas was used during this time?

A) 2000 psig
B) 750 psig
C) 573 psig
D) 107 psig

Question 48

According to the NFPA,for a nonambulatory patient,the minimum distance from a bulk oxygen supply is _____ feet.

A) 5
B) 10
C) 25
D) 50

Question 49

A home care patient inquires about how long her portable liquid oxygen system,currently weighing 30 lb,will last if she uses 3 L/min.The manufacturer says the weight of an empty container is 8 lb. Her system will last for _____ day(s)and _____ hours.

A) 1; 18
B) 2; 9
C) 4; 21
D) 8; 12

Question 50

A "G" size oxygen cylinder with 1450 psig is being used at 5 L/min.This cylinder will be empty in approximately _____ hour(s)and _____ minutes.

A) 1; 30
B) 2; 39
C) 11; 30
D) 15; 16

Question 51

The gas above liquid oxygen is maintained:

A) between its freezing point and its critical temperature.
B) between its boiling point and its critical temperature.
C) at its critical pressure.
D) at its boiling point.

Question 52

After connecting an oxygen regulator to an "H" cylinder and turning the direct-acting valve on,the respiratory therapist attem

Question 53

An "E" size cylinder is turned on,and the flowmeter is off.Which of the following is (are)the most likely cause(s)of a hissing sound?
1)A cracked flowmeter
2)Inadequate pressure in the cylinder
3)An obstruction at the regulator outlet
4)A leak in the connection between the yoke and the cylinder opening

A) 2
B) 1 and 2
C) 1 and 3
D) 1 and 4

Question 54

An "E" size cylinder with 1600 psig is used to provide oxygen to a simple mask running at 5 L/min during a transport.The cylinder will last:

A) 8 hours.
B) 56 minutes.
C) 68 minutes.
D) 89 minutes.

Question 55

A full "H" size cylinder is used to provide oxygen to an air-entrainment mask at 6 L/min.If the cylinder is replaced at 500 psig,how long will it last?

A) 5 hours
B) 10 hours 20 minutes
C) 10 hours 50 minutes
D) 15 hours 23 minutes

Question 56

The best position for the cylinder valve when it is being used is:

A) completely open.
B) two turns toward the left.
C) one turn, open toward the right.
D) one half-turn back from completely open.

Question 57

The NFPA requires bulk oxygen systems to be located:
1)10 feet from flammable gas storage.
2)10 feet from public sidewalks.
3)5 feet from the property line.
4)5 feet from congested areas.

A) 1 and 4
B) 2 and 3
C) 2,3,and 4
D) 1,2,3,and 4

Question 58

If a portable liquid oxygen reservoir is set to deliver 6 L/min and the current reservoir weight is 38 lb,it will take _____ hours for the reservoir to empty if the weight of an empty container is 10 lb.

A) 5
B) 23
C) 27
D) 36

Question 59

One liter of liquid oxygen weighs _____ oz.

A) 25
B) 40
C) 86
D) 860

Question 60

Which of the following are components of a bulk liquid oxygen system?
1)3AA container
2)Insulated reservoir
3)Pressure-release valve
4)A heater for the liquid oxygen

A) 2 and 3
B) 1 and 3
C) 2 and 4
D) 1 and 4

Question 61

The type of station outlet connection that uses noninterchangeable thread fittings to connect gas-powered devices to station outlets is known as:

A) regulator.
B) quick-connect adapter.
C) Pin Index Safety System.
D) DISS.

Question 62

During your home care visit on Monday morning,you weigh the patient's portable liquid oxygen reservoir.The liquid oxygen weighs 18 lb,and the patient is using 2 L/min.When should you schedule a visit to fill up the reservoir?

A) The next Monday
B) Wednesday morning
C) Thursday afternoon
D) Friday afternoon

Question 63

Which safety system(s)is (are)found at station outlets of a medical gas piping system?
1)Diameter Index Safety System (DISS)
2)American Standard Safety System (ASSS)
3)Pin Index Safety System
4)Quick Connect

A) 1
B) 1 and 4
C) 2 and 3
D) 2 and 4

Question 64

If the working pressure of a bulk oxygen system is 45 psig,all pressure-relief valves should be set at _____ psig.

A) 45
B) 50
C) 67
D) 80

Question 65

Which of the following agencies makes recommendations for medical air supply?

A) ISO
B) NFPA
C) CGA
D) Bureau of Medical Devices

Question 66

Which of the following type(s)of air compressors is (are)used in bulk supply systems?
1)Piston
2)Rotary
3)Liquid air
4)Diaphragm

A) 1 and 4
B) 1 and 3
C) 1 and 2
D) 2

Question 67

Approximately how long will a liquid oxygen reservoir last when supplying 3 L/min to your patient? The current reservoir weight is 20 lb,and the weight of an empty reservoir is 10 lb.

A) 19 hours
B) 38 hours
C) 46 hours
D) 119 hours

Question 68

Which of the following statements reflect(s)the recommendations of the NFPA and CGA for storing cylinders outdoors?
1)Cylinders should not be stored in an area where the temperature exceeds 125° F.
2)Cylinders must be protected from the weather.
3)Full and empty cylinders should be kept separate.
4)Cylinders should not be stored outside

A) 4
B) 1 and 2
C) 2 and 3
D) 1,2,and 3

Question 69

Which of the following types of compressor can accommodate a mechanical ventilator?
1)Diaphragm
2)Liquid air
3)Rotary
4)Piston

A) 1
B) 2 and 4
C) 3 and 4
D) 1,3,and 4

Question 70

Which of the following large-cylinder safety recommendations is not appropriate?

A) Protective caps are not necessary during storage.
B) Cylinders should be transported with protective caps.
C) Cylinder carts used in the operating room must be grounded.
D) Transportation must occur on an appropriate cart, onto which the cylinder is secured by a chain.

Question 71

The NFPA requires that bulk oxygen systems be at least how many feet from parked vehicles?

A) 5
B) 10
C) 15
D) 20

Question 72

One liter of liquid oxygen is equivalent to _____ liters of gaseous oxygen.

A) 2.5
B) 328
C) 348
D) 860

Question 73

Which is true about the process of fractional distillation of liquid air?

A) Compressed air is a by-product.
B) It produces pure liquid oxygen.
C) Liquid nitrous oxide is produced.
D) Concentrators use it to produce oxygen.

Question 74

Which of the following statements about medical air supplies are false?
1)The air intake port must be located indoors.
2)The source of medical air must be from the outside atmosphere.
3)Most hospital bulk air supply systems use two compressors.
4)Backflow through the compressors that are cycled off must be prevented manually.

A) 1 and 4
B) 1,2,and 3
C) 2 and 3
D) 3 and 4

Question 75

In the event of a fire in a hospital,which of the following might be necessary?
1)Provide supplemental oxygen to patients who require it.
2)Shut off oxygen zone valves to the affected area.
3)Shut off the main oxygen valve.
4)Check oxygen line pressure.

A) 3
B) 1 and 2
C) 2 and 4
D) 3 and 4

Question 76

Which of the following statements are true given that,on one side of a medical gas cylinder,the only markings to appear are 3 (tw)84 + *.
1)The cylinder passed the hydrostatic test.
2)The cylinder must be retested after 5 years.
3)The cylinder must be retested after 10 years.
4)The cylinder was manufactured in March 1984.
5)Hydrostatic testing was performed in March 1984.

A) 2,3,and 4
B) 2,3,and 5
C) 1,4,and 5
D) 1,2,and 4

Question 77

Which of the following is (are)a small nebulizer compressor(s)?
1)Diaphragm
2)Liquid air
3)Rotary
4)Piston

A) 4
B) 1
C) 1 and 2
D) 1,3,and 4

Question 78

Which of the following are safety features incorporated into a medical gas piping system?
1)Zone valves
2)Riser valves
3)Pressure-relief valves
4)In-line oxygen analyzers

A) 3 and 4
B) 1 and 3
C) 1 and 4
D) 1,2,and 3

Question 79

What percentage of oxygen does a typical molecular sieve concentrator provide when it is running at 2 L/min?

A) 100%
B) 90%
C) 85%
D) 40%

Question 80

Figure 3-20 shows an outlet that uses DISS.This system,which was designed by the CGA,uses noninterchangeable thread fittings to connect gas-powered devices to station outlets.