Question 1

Which of the following statements is FALSE about PISS standards?

Accepted Answer

A)   The exact positions of pins and pinholes do not vary for each gas.
B)   In order to work, the yoke nipple has to seat in the recessed valve outlet.
C)   They apply only to cylinders using a yoke connection.
D)   They have six pin positions and 10 possible pin/hole combinations.E) A) and B)
F) A) and C)

Question 2

Which of the following medical gases support combustion?
1)  O2
2)  N2O
3)  Compressed air
4)  CO2

Accepted Answer

A)  1 and 4 only
B)  2 and 3 only
C)  1, 2, and 3 only
D)  1, 3, and 4 onlyE) B) and D)
F) A) and B)

Question 3

The measured pressure in a liquid-filled cylinder is equivalent to which of the following?

Accepted Answer

A)   The force necessary to compress its volume within the cylinder
B)   Its filling density divided by the cylinder gas factor
C)   The pressure of the surface vapor at any given temperature
D)   The weight of the liquid divided by the density of waterE) A) and B)
F) None of the above

Question 4

What is the fire-risk classification of both N and CO2?

Accepted Answer

A)   Flammable
B)   Supports combustion
C)   Inflammable
D)   NonflammableE) A) and B)
F) A) and C)

Question 5

Which of the following are considered therapeutic gases?
1)  Oxygen (O2) 
2)  O2-NO mixture
3)  O2-He mixture
4)  N2O

Accepted Answer

A)  1 and 2 only
B)  2 and 4 only
C)  3 and 4 only
D)  1, 2, and 3 onlyE) A) and D)
F) A) and C)

Question 6

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?

Accepted Answer

A)   1 hr 30 min
B)   17 hr 30 min
C)   18 hr 10 min
D)   21 hr 50 minE) C) and D)
F) All of the above

Question 7

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 deviceE) None of the above
F) A) and D)

Question 8

Which of the following is false about a compensated Thorpe tube?

Accepted Answer

A)   Variable-orifice, constant-pressure flowmeter device
B)   Calibrated in liters per minute at atmospheric pressure
C)   Flow-control needle valve placed distal to the flow tube
D)   Accuracy unaffected by changes in downstream resistanceE) A) and C)
F) A) and B)

Question 9

The pressure of O2 or air in a bulk supply system is reduced to what standard working pressure?

Accepted Answer

A)   10 psig
B)   14 psig
C)   25 psig
D)   50 psigE) A) and B)
F) A) and C)

Question 10

What is the greatest potential problem with quick-connect DISS systems?

Accepted Answer

A)   Increased cost of flowmeter equipment
B)   Decreased accuracy in flowmeter equipment
C)   Difficulty in training new personnel
D)   Incompatibility among different manufacturersE) None of the above
F) A) and C)

Question 11

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?

Accepted Answer

A)   It is made of spun aluminum, not steel.
B)   It only requires a 10-year DOT inspection.
C)   It can be filled to 10% above its service pressure.
D)   It has a high coefficient of elastic expansion.E) C) and D)
F) A) and B)

Question 12

The measured pressure in a gas-filled cylinder is equivalent to which of the following?

Accepted Answer

A)   Its filling density divided by the cylinder gas factor.
B)   Gas temperature times its coefficient of expansion.
C)   Gas density divided by the density of air at standard temperature, standard pressure, dry (STP
D)  .
D)   The force required to compress its volume within the cylinder.E) A) and C)
F) A) and D)

Question 13

According to the U.S. Department of Commerce, a gas cylinder that is color coded blue should contain which of the following?

Accepted Answer

A)   Air
B)   He
C)   N2O
D)   O2E) None of the above
F) B) and C)

Question 14

When using a Bourdon gauge against high outflow resistance, what will the flowmeter reading show?

Accepted Answer

A)   Exceed actual flow
B)   Be less than actual flow
C)   Equal actual flow
D)   Equal 50 psigE) A) and B)
F) A) and C)

Question 15

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.

Accepted Answer

A)  1 and 3 only
B)  1, 2, and 3 only
C)  3 and 4 only
D)  2, 3, and 4 onlyE) A) and B)
F) None of the above

Question 16

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

Accepted Answer

A)  2 and 3 only
B)  2 and 4 only
C)  1, 2, and 3 only
D)  1, 3, and 4 onlyE) A) and D)
F) B) and D)

Question 17

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 O2E) All of the above
F) None of the above

Question 18

Structural requirements for the central piping systems that are used in hospitals to distribute gases are established by whom?

Accepted Answer

A)   American National Standards Institute (ANSI) 
B)   Department of Transportation
C)   National Fire Protection Association (NFP
A)  
D)   Compressed Gas Association (CG
A)  E) B) and D)
F) B) and C)

Question 19

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

Accepted Answer

A)   21%
B)   90%
C)   95%
D)   99%E) None of the above
F) A) and B)

Question 20

Which of the following statements about He is false?

Accepted Answer

A)   It is an inert gas.
B)   It is odorless.
C)   It is nonflammable.
D)   It is heavier than air.E) A) and C)
F) B) and C)

Exam 40: Storage and Delivery of Medical Gases

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

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What is the greatest potential problem with quick-connect DISS systems?

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According to the U.S. Department of Commerce, a gas cylinder that is color coded blue should contain which of the following?

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What is the fire-risk classification of both N and CO2?

Correct AnswerverifiedShow Answer

The measured pressure in a liquid-filled cylinder is equivalent to which of the following?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following statements about He is false?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following are considered therapeutic gases? 1) Oxygen (O2) 2) O2-NO mixture 3) O2-He mixture 4) N2O

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Structural requirements for the central piping systems that are used in hospitals to distribute gases are established by whom?

Correct AnswerverifiedShow Answer

The pressure of O2 or air in a bulk supply system is reduced to what standard working pressure?

Correct AnswerverifiedShow Answer

Which of the following medical gases support combustion? 1) O2 2) N2O 3) Compressed air 4) CO2

Correct AnswerverifiedShow Answer

When using a Bourdon gauge against high outflow resistance, what will the flowmeter reading show?

Correct AnswerverifiedShow Answer

The measured pressure in a gas-filled cylinder is equivalent to which of the following?

Correct AnswerverifiedShow Answer

Which of the following is false about a compensated Thorpe tube?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

Which of the following statements is FALSE about PISS standards?

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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What is the fire-risk classification of both N and CO₂?

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

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Which of the following are considered therapeutic gases? 1) Oxygen (O₂) 2) O₂-NO mixture 3) O₂-He mixture 4) N₂O

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The pressure of O₂or air in a bulk supply system is reduced to what standard working pressure?

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Which of the following medical gases support combustion? 1) O₂ 2) N₂O 3) Compressed air 4) CO₂

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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?

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