Deck 1: Medical Gas Supply Equipment

Question 1

High air flow with oxygen enrichment (HAFOE) masks alter oxygen concentrations by:
I. changing nozzle size
II. changing air entrainment port size
III. changing oxygen liter flow into the mask
IV. changing air liter flow into the mask

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

Answer 1

I and II

Question 2

Gas flows from one point to another because:

A) of a pressure gradient
B) of a concentration gradient
C) of a difference in partial pressure
D) none of the above

Answer 2

A

Question 3

Gas pressure will increase with:
I. an increase in temperature
II. a decrease in temperature
III. a decrease in volume
IV. an increase in volume

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

Answer 3

I and III

Question 4

Elastic collisions between molecules implies that:
I. there is no net energy transfer
II. no energy is lost by the collision
III. no energy is gained by the collision
IV. net energy remains the same

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

Question 5

Pressure of a fluid at any point in a closed container is the same as the pressure at another point in the same container. This best describes:

A) Henry's law
B) Fick's law
C) Pascal's law
D) Graham's law

Question 6

If the temperature of a gas decreases:

A) molecular activity increases
B) molecular activity decreases
C) molecular activity remains the same
D) the concentration gradient increases

Question 7

Which of the following are assumptions regarding the kinetic theory of gases?
I. Gases are composed of discrete molecules.
II. Gas molecules are in random motion.
III. All collisions between molecules are elastic in nature.
IV. Temperature affects the molecular activity.

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

Question 8

A constant area duct:

A) maintains forward velocity
B) decreases pressure for an increase in velocity
C) increases pressure for a decrease in velocity
D) none of the above

Question 9

A converging duct:

A) maintains forward velocity
B) decreases pressure for an increase in velocity
C) increases pressure for a decrease in velocity
D) none of the above

Question 10

The principle of viscous shearing and vorticity may be applied to:

A) gas pressure reduction valves
B) air/oxygen entrainment devices
C) measurement of gas flow
D) measurement of gas pressure

Question 11

High air flow with oxygen enrichment (HAFOE) masks operate using:

A) partial pressure differences
B) viscous shearing and vorticity
C) Bernoulli's principle
D) Pascal's law

Question 12

Under which of the following circumstances will gas flow be greater between two points?
I. if the pressure difference is large
II. if the pressure difference is small
III. if the opening between the points is large
IV. if the opening between the points is small

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

Question 13

A type of pressure-measuring device used to measure the pressure in a compressed-gas cylinder is a(n):

A) aneroid barometer
B) mechanical manometer
C) strain gauge transducer
D) Bourdon gauge

Question 14

As gas velocity increases, lateral pressure decreases. This best describes:

A) the kinetic theory of gases
B) Pascal's law
C) Reynold's equation
D) Bernoulli's principle

Question 15

A venturi tube has an expanding radius that does not exceed:

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

Question 16

Back pressure distal to the point of entrainment in a high air flow with oxygen enrichment (HAFOE) mask will:

A) increase oxygen concentration
B) decrease oxygen concentration
C) have no effect on oxygen concentration
D) increase the total flow

Question 17

The most accurate type of barometer is the:

A) aneroid barometer
B) mercury barometer
C) mechanical manometer
D) none of the above

Question 18

When flow is choked, gas velocity is:

A) sonic
B) laminar
C) well behaved
D) none of the above

Question 19

A constant area duct:

A) has an increasing area as gas moves through the duct
B) has a decreasing area as gas moves through the duct
C) has an area that remains the same as gas moves through the duct
D) none of the above

Question 20

An increase in pressure through a nozzle resulting in no increase in flow best describes:

A) Bernoulli's principle
B) the venturi effect
C) choked flow
D) Reynold's number

Question 21

You are at sea level working in the NBRC Hospital. What is the partial pressure for oxygen?

A) 159 mmHg
B) 134 mmHg
C) 94 mmHg
D) none of the above

Question 22

The rate of diffusion of a gas into or out of a liquid is directly proportional to the partial pressure of that gas. This best describes:

A) Fick's law
B) Henry's law
C) Dalton's law
D) Graham's law

Question 23

Which of the following are factors in Poiseuille's law?
I. length
II. radius
III. pressure
IV. viscosity

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

Question 24

According to Graham's law, carbon dioxide when compared with oxygen is:

A) more soluble in blood
B) less soluble in blood
C) has the same solubility at the same pressures
D) none of the above

Question 25

A gas's velocity is said to be choked when:

A) velocity can no longer increase
B) a maximum temperature is reached
C) pressure is at a maximum
D) the gas concentration is at a maximum

Question 26

Given the following, solve for the new temperature: $\begin{array}{ll}\text { Initial pressure } & 760 \mathrm{mmHg} \\\text { Initial temperature } & 10 \text { degrees Celsius } \\\text { New pressure } & 435 \mathrm{mmHg}\end{array}$

A) 111 degrees Celsius
B) 11 degrees Celsius
C) -75 degrees Celsius
D) -111 degrees Celsius

Question 27

Given the following, solve for the new volume: $\begin{array} { l l } \text { Initial volume } & 10 \mathrm {~L} \\\text { Initial temperature } & 30 \text { degrees Celsius } \\\text { New temperature } & 100 \text { degrees Celsius }\end{array}$

A) 12.31 L
B) 10.38 L
C) 13.33 L
D) 15.0 L

Question 28

Given the following, calculate the initial temperature: $\begin{array} { l l } \text { Initial pressure } & 500 \mathrm { mmHg } \\\text { Initial volume } & 9 \mathrm {~L} \\\text { New pressure } & 9,000 \mathrm { mmHg } \\\text { New volume } & 32 \mathrm {~L} \\\text { New temperature } & 35 \text { degrees Celsius }\end{array}$

A) 134 degrees Celsius
B) 13 degrees Celsius
C) -229 degrees Celsius
D) 273 degrees Celsius

Question 29

A Reynold's number calculation is performed, and the Reynold's number is 5,000. How would this flow be described?

A) laminar
B) transitional
C) turbulent
D) none of the above

Question 30

The atmospheric pressure is 740 mmHg (Salt Lake City, UT). What is the partial pressure for oxygen?

A) 159 mmHg
B) 134 mmHg
C) 94 mmHg
D) none of the above

Question 31

A 12-mm endotracheal tube is removed and replaced with a 6-mm endotracheal tube. What is the effect on resistance?

A) Resistance remains the same.
B) Resistance doubles.
C) Resistance decreases.
D) Resistance increases 16 times.

Question 32

Given the following gas mixture and total pressure, calculate the partial pressure for oxygen: $\begin{array} { l l } \text { Oxygen } & 10 \% \\\text { Carbon dioxide } & 20 \% \\\text { Nitrogen } & 70 \% \\\text { Total pressure } & 760 \mathrm { mmHg }\end{array}$

A) 76.0 mmHg
B) 152.0 mmHg
C) 532 mmHg
D) none of the above

Question 33

Given the following, calculate the new volume: Initial pressure $\quad 645 \mathrm { mmHg }$
Initial volume $\quad 3 \mathrm {~L}$
New pressure $\quad 720 \mathrm { mmHg }$

A) 1.69 L
B) 2.69 L
C) 3.35 L
D) 4.69 L

Question 34

You double the length of an oxygen tube by adding 5 feet of connecting tubing. Adding the additional tubing has what effect on resistance to flow?

A) Resistance remains the same.
B) Resistance decreases.
C) Resistance increases.
D) none of the above

Question 35

A Reynold's number calculation is performed, and the Reynold's number is 1,500. How would this flow be described?

A) laminar
B) transitional
C) turbulent
D) none of the above

Question 36

Given the following gas mixture and total pressure, calculate the partial pressure for carbon dioxide: $\begin{array} { l l } \text { Oxygen } & 10 \% \\\text { Carbon dioxide } & 20 \% \\\text { Nitrogen } & 70 \% \\\text { Total pressure } & 760 \mathrm { mmHg }\end{array}$

A) 76.0 mmHg
B) 152.0 mmHg
C) 532 mmHg
D) none of the above

Question 37

Given the following, solve for the new volume: $\begin{array} { l l } \text { Initial pressure } & 645 \mathrm { mmHg } \\\text { Initial volume } & 2 \mathrm {~L} \\\text { New pressure } & 800 \mathrm { mmHg }\end{array}$

A) 0.61 L
B) 1.61 L
C) 2.41 L
D) 4.61 L

Question 38

Given the following, calculate the initial temperature: $\begin{array} { l l } \text { Initial pressure } & 700 \mathrm { mmHg } \\\text { Initial volume } & 10 \mathrm {~L} \\\text { New pressure } & 650 \mathrm { mmHg } \\\text { New volume } & 40 \mathrm {~L} \\\text { New temperature } & 32 \text { degrees } \mathrm { C }\end{array}$

A) 66 degrees Celsius
B) 0 degrees Celsius
C) -173 degrees Celsius
D) -273 degrees Celsius

Question 39

Given the following, solve for the new temperature: $\begin{array} { l l } \text { Initial volume } & 9 \mathrm {~L} \\\text { Initial temperature } & 24 \text { degrees Celsius } \\\text { New volume } & 3 \mathrm {~L}\end{array}$

A) 174 degrees Celsius
B) 0 degrees Celsius
C) -50 degrees Celsius
D) -174 degrees Celsius

Question 40

A Reynold's number calculation is performed, and the Reynold's number is 2,500. How would this flow be described?

A) laminar
B) transitional
C) turbulent
D) none of the above

Question 41

When making the decision to use a liquid system for a patient's home, it is important to:

A) ensure that gas usage exceeds the rate of evaporation
B) ensure that the patient doesn't need more that 2 L/min flow
C) ensure that the liquid reservoir is located away from draperies
D) ensure that only high-pressure liquid reservoirs are installed

Question 42

What factors should you consider when placing an oxygen concentrator into a patient's home?
I. Know how large of an electrical load is allowed on the circuit you wish to use.
II. Keep the concentrator away from loose draperies.
III. Keep the concentrator away from heat vents, registers, or baseboard heaters.
IV. Place the concentrator centrally within the home if possible.

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

Question 43

Which of the following oxygen concentrators are portable? AirSep VisionAire3^TM
AirSep FreeStyle^TM
Invacare Perfecto₂ V
Invacare SOLO2

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

Question 44

Which of the following oxygen concentrators has an attachment that can fill portable oxygen cylinders?

A) AirSep VisionAire3^TM
B) Invacare Perfecto₂ V
C) AirSep NewLife Intensity
D) Invacare Platinum 10

Question 45

The rate of diffusion of a gas in a gaseous medium is directly proportional to the concentration gradient. This best describes:

A) Fick's law
B) Henry's law
C) Dalton's law
D) Graham's law

Question 46

A zone valve controls oxygen flow:

A) to a ward or wing of a building
B) between floors
C) from the main reservoir to the building
D) none of the above

Question 47

What precautions must you use when using the HomeFill II compressor with the Invacare Perfecto₂ V concentrator?

A) A separate power source (outlet) must be available.
B) It must be kept away from any heat source.
C) Only 3,500 psi cylinders may be filled.
D) none of the above

Question 48

When filling a portable reservoir from a liquid reservoir for home use, you should be cautious because:

A) it will spontaneously ignite
B) it will not last as long as compressed oxygen in a cylinder
C) it is at a -183 degrees Celsius
D) it is under very high pressure

Question 49

As a general rule, you should not add more than how many feet of extension tube to an oxygen concentrator?

A) 10 feet
B) 20 feet
C) 30 feet
D) 50 feet

Question 50

An oxygen concentrator works using the principle of:

A) absorption
B) chemical reaction to form oxygen
C) compression
D) adsorption

Question 51

A type of compressor used to supply a hospital or large clinic with compressed air is the:

A) piston compressor
B) centrifugal compressor
C) diaphragm compressor
D) two-stage compressor

Question 52

Types of bulk supply systems include:
I. liquid main supply with a liquid reserve
II. liquid main supply with a cylinder manifold reserve
III. cylinder manifold main supply with a cylinder manifold reserve

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

Question 53

A bulk oxygen supply system's tubing is made from:

A) polyvinyl chloride (PVC)
B) galvanized steel
C) stainless steel
D) copper

Question 54

The standards for construction of a bulk supply piping system is regulated by:

A) the Food and Drug Administration (FDA)
B) the Department of Transportation (DOT)
C) the Compressed Gas Association (CGA)
D) the National Fire Protection Association (NFPA)

Question 55

You are determining the weight of a portable reservoir, and you determine that it contains 10 lbs of liquid oxygen. This is equivalent to:

A) 100 L gaseous oxygen
B) 1,000 L of gaseous oxygen
C) 3,428 L of gaseous oxygen
D) 5,430 L of gaseous oxygen

Question 56

When using the weight of a portable reservoir to determine its duration, you should apply a "safety factor" of:

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

Question 57

A riser valve controls oxygen flow:

A) to a ward or wing of a building
B) between floors
C) from the main reservoir to the building
D) none of the above

Question 58

A common type of compressor used to power home nebulizers is a:

A) piston compressor
B) centrifugal compressor
C) diaphragm compressor
D) two-stage compressor

Question 59

Once a bulk supply system's piping has passed the pressure test, it is important to check the oxygen outlets for:

A) a pressure less than 25 psi
B) purity
C) a pressure greater than 200 psi
D) none of the above

Question 60

Which of the following portable liquid reservoirs incorporates a pneumatic conserving device?

A) Invacare Perfecto₂ V
B) AirSep VisionAire3^TM
C) Caire HELiOS
D) none of the above

Question 61

You are about to transport a patient from computerized tomography (CT) to the intensive care unit who is being bagged with a bag-mask. You set the liter flow at 15 Lmin. The cylinder reads 1,000 psi. How long do you have before the cylinder is empty?

A) 14 minutes
B) 16 minutes
C) 18 minutes
D) 20 minutes

Question 62

A fiber-wrapped aluminum oxygen cylinder may be filled to:

A) 2,200 psi
B) 2,500 psi
C) 3,000 psi
D) 3,500 psi

Question 63

Which of the following should be observed when storing cylinders?
I. Post the names of gases being stored.
II. Keep empty and full cylinders separate.
III. Use chains to secure the cylinders to the wall.
IV. Do not store flammable substances with the cylinders.

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

Question 64

Upon inspection you note the letter and number combination of 3AA stamped into an oxygen cylinder's shoulder. This means:

A) the cylinder may be used for 3 hours
B) the cylinder is made of chrome molybdenum steel
C) the cylinder is made of aluminum
D) the cylinder is of a fiber-wrapped aluminum construction

Question 65

Which of the following are true regarding a 3AA "H" size oxygen cylinder?
I. The cylinder contains 22 cubic feet when full.
II. The cylinder contains 244 cubic feet when full.
III. The cylinder may be filled to 2,200 psi.
IV. The cylinder may be filled to 3,000 psi.

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

Question 66

Which of the following should be observed when withdrawing cylinder contents?
I. Leave the cylinder cap in place until you attach a regulator or reducing valve.
II. Follow all safety precautions.
III. Do not force any threaded connections.
IV. Open cylinder valves slowly.

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

Question 67

You are working with an outpatient who needs to go home on an "E" cylinder. She is wearing a nasal cannula at 2 L/min, and her cylinder has 1,500 psi remaining. She needs to travel by car one and one-half hours to reach her home and her concentrator. Can she make it?

A) yes
B) no

Question 68

Which of the following are true regarding a 3AA "E" size oxygen cylinder?
I. The cylinder contains 22 cubic feet when full.
II. The cylinder contains 244 cubic feet when full.
III. The cylinder may be filled to 2,200 psi.
IV. The cylinder may be filled to 3,000 psi.

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

Question 69

The international color code for oxygen is:

A) gray
B) brown
C) green
D) white

Question 70

Upon inspection you do not see the letter and number combination of 3AL stamped into an oxygen cylinder's shoulder. This means:

A) the cylinder may be used for 3 hours
B) the cylinder is made of chrome molybdenum steel
C) the cylinder is made of aluminum
D) the cylinder is of a fiber-wrapped aluminum construction

Question 71

You are setting a patient up on a non-rebreathing mask at a liter flow of 10 L/min. The "H" cylinder you are using reads 1,700 psi. How long will the cylinder last until you need to change it at 500 psi?

A) 3 hours
B) 4 hours
C) 5 hours
D) 6 hours

Question 72

Which of the following should be observed when moving an "H" cylinder of oxygen?
I. Leave the valve cap on.
II. Don't lift the cylinder by its cap.
III. Don't slide or drag the cylinder.
IV. Don't drop the cylinder.

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

Question 73

Which of the following are true regarding a direct-acting cylinder valve?
I. It acts directly on the valve seat.
II. Turning the valve stem moves a diaphragm.
III. It is used on large cylinders (H or K).
IV. It is used on small cylinders (E).

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

Question 74

The diameter index safety system (DISS):
I. uses different pitches and threads per inch
II. uses internal and external threads
III. is intended for low pressure (< 200 psi)
IV. is intended for high pressure (> 200 psi)

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

Question 75

Station outlets may consist of:
I. Diameter Index Safety System (DISS) fittings
II. American Standard Safety System (ASSS) fittings
III. quick connect fittings

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

Question 76

Which of the following are true regarding a direct-acting cylinder valve?
I. It acts directly on the valve seat.
II. Turning the valve stem moves a diaphragm.
III. It is used on large cylinders (H or K).
IV. It is used on small cylinders (E).

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

Question 77

If a hydrostatic test date has a "+" sign following it:

A) the cylinder must be tested in 5 years
B) the cylinder must be tested in 10 years
C) the cylinder must be tested in 15 years
D) the cylinder must be tested in 17 years

Question 78

Most oxygen alarm panels are located:

A) at the main entrance to the facility
B) where the oxygen enters the building
C) at the respiratory care department
D) at the switchboard

Question 79

You need to transport a patient by helicopter to your home base one and one-half hours away. You are using a bag-mask at a liter flow of 15 L/min. How many full "E" cylinders do you need for the transport?

A) one
B) two
C) three
D) four

Question 80

During hydrostatic testing, a cylinder is filled to:

A) 1/3 the service pressure
B) 4/3 the service pressure
C) 5/3 the service pressure
D) 9/5 the service pressure