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FF II > CH 18 > Flashcards

CH 18 Flashcards

1
Q

Which extinguishment method involves foam creating a barrier between the fuel gases and any possible ignition sources? (871) [5.3.1]

A. Cooling
B. Separating
C. Smothering
D. Penetrating

A

B. Separating

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2
Q

Class B foams are especially effective on: (872) [5.3.1]

A. surfactants.
B. hydrocarbon fuels.
C. ordinary combustibles.
D. energized electrical equipment.

A

B. hydrocarbon fuels.

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3
Q

In order to create high-quality foam: (872) [5.3.1J

A. a fog nozzle must be used.
B. a foam nozzle must be used.
C. foam concentrate, water, and air must be mixed in the correct ratio.
D. foam solution and water must be premixed and allowed to rest before application.

A

C. foam concentrate, water, and air must be mixed in the correct ratio.

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4
Q

High-quality foam bubbles are created through the process of: (872) [5.3.1]

A. aeration.
B. expansion.
C. separation.
D. saponification.

A

A. aeration.

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5
Q

The amount that fire fighting foam expands depends on the type of foam concentrate used and: (873) [5.3.1]

A. the number of personnel working with the proportioner.
B. whether the water is from a static or pressurized source.
C. whether potable or nonpotable water is used in the solution.
D. accurate proportioning of the foam concentrate in the solution.

A

D. accurate proportioning of the foam concentrate in the solution.

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6
Q

Class A foam acts as a surfactant, which means that it: (874) [5.11]

A. requires a special type of nozzle for application.
B. requires a special type of aeration tool to be formed.
C. lowers the surface tension of water, allowing better penetration into the fuel.
D. raises the surface tension of water, creating a more effective extinguishing agent.

A

C. lowers the surface tension of water, allowing better penetration into the fuel.

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7
Q

Which is true of polar solvent fuels? (874) [5.3.1]

A. They are flammable liquids that mix readily with water.
B. Gasoline is the most common example of a polar solvent.
C. Fires involving polar solvents can be extinguished using Class B foams designed for hydrocarbon fires.
D. Fires involving polar solvents can be extinguished using Class A foams designed for ordinary combustible fires.

A

A. They are flammable liquids that mix readily with water.

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8
Q

The rate of application for Class B foam depends on: (874) [5.11]

A. the location of the fuel spill.
B. whether or not the fuel is a surfactant.
C. the type of water used to proportion the foam.
D. whether the fuel is spilled or contained in a tank.

A

D. whether the fuel is spilled or contained in a tank.

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9
Q

What is necessary when applying fire fighting foam? (874) [5.3.1]

A. A vapor protective suit and SCBA
B. A hazardous materials team standing by
C. Continued, uninterrupted application until extinguishment
D. Intermittent application breaks to allow the foam to settle

A

C. Continued, uninterrupted application until extinguishment

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10
Q

Which hazard is associated with fire fighting foam concentrate?5.3,1

A. Frostbite if foam contacts unprotected skin
B. Nausea and fever if foam contacts the skin
C. Widespread negative environmental effects
D. Degradation of PPE if left on the garments for a long period of time

A

D. Degradation of PPE if left on the garments for a long period of time

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11
Q

Because of environmental concerns about fire fighting foam, firefighters should: (876) [5.3.1]

A. use foam only as the last option for extinguishment.
B. try to prevent the foam from entering bodies of water.
C. not use foam near bodies of water or public water sources.
D. have a hazardous materials team on standby when using the foam.

A

B. try to prevent the foam from entering bodies of water.

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12
Q

Mixing water with foam concentrate to form a foam solution is referred to as: (876) [5.3.1]

A. aerating.
B. surfacting.
C. saponifying.
D. proportioning.

A
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13
Q

Most fire fighting foams are intended to be mixed with: (876) [5.3.1]

A. 30 to 60 percent water.
B. 50 to 75.9 percent water.
C. 80 to 90 percent water.
D. 94 to 99.9 percent water.

A

D. 94 to 99.9 percent water.

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14
Q

Which factor is important when selecting the appropriate foam proportioner to use? (876) [5.3.1]

A. Weather conditions
B. Terrain in the fire area
C. Available water pressure
D. Stage of fire development

A

C. Available water pressure

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15
Q

Which method of foam proportioning involves using an external pump to force foam concentrate into the fire stream? (877) [5.3.1]

A. Eduction
B. Injection
C. Premixing
D. Batch mixing

A

B. Injection

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16
Q

The premixing method of foam proportioning is typically used with: (878) [5.3.1]

A. in-line eductors.
B. vehicle-mounted tank systems.
C. fog nozzles attached to a large hoseline.
D. a fixed fire protection system in a structure.

A

B. vehicle-mounted tank systems.

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17
Q

Which type of foam proportioner is directly attached to the pump panel outlet or connected at some point in the hose lay? (878) [5.3.1]

A. In-line eductor
B. Foam nozzle eductor
C. Apparatus-mounted proportioner
D. Compressed air foam system (CAFS)

A

A. In-line eductor

18
Q

Which type of foam proportioner can compromise firefighter safety by slowing firefighters down since it requires the concentrate to be available where the nozzle is being operated? (878-879) [5.3.1]

A. In-line eductor
B. Foam nozzle eductor
C. Apparatus-mounted proportioner
D. Compressed air foam system (CAFS)

A

B. Foam nozzle eductor

19
Q

A(an) _____ is mounted on an apparatus and uses a centrifugal pump to supply the water for the foam solution and an onboard air compressor to add air to the mixture before discharge. (879) [5.3.1]

A. in-line eductor
B. around-the-pump proportioner
C. balanced-pressure proportioner
D. compressed air foam system (CAFS)

A

D. compressed air foam system (CAFS)

20
Q

Fog nozzles can be used with foam solution to produce: (880) [5.11]

A. low-expansion, long-lasting foam.
B. low-expansion, short-lasting foam.
C. high-expansion, long-lasting foam.
D. high-expansion, short-lasting foam.

A

B. low-expansion, short-lasting foam.

21
Q

An advantage of _____ is that they are widely available on most fire apparatus. (880) [5.3.1]

A. fog nozzles
B. foam nozzles
C. apparatus-mounted proportioners
D. compressed air foam systems (CAFS)

A

A. fog nozzles

22
Q

What is a disadvantage of using fog nozzles to apply fire fighting foam? (880) [5.3.1]

A. They are not as versatile as foam nozzles.
B. They provide a limited reach compared to other nozzles.
C. Operator error is more likely to produce lower quality foam.
D. They are specialty nozzles that are not widely available on most apparatus.

A

C. Operator error is more likely to produce lower quality foam.

23
Q

Which is a characteristic of foam nozzles? (881) [5.3.1]

A. Lower quality foam than fog nozzles
B. Longer stream reach than fog nozzles
C. More versatile overall than fog nozzles
D. Shorter stream reach than fog nozzles

A

D. Shorter stream reach than fog nozzles

24
Q

What is an advantage of using a foam nozzle to apply fire fighting foam? (881) [5.3.1]

A. More versatile than a fog nozzle
B. Longer reach than other nozzles
C. More widely available than a fog nozzle
D. Produces higher quality foam than a fog nozzle

A

D. Produces higher quality foam than a fog nozzle

25
Q

If the foam being produced is poor quality, the firefighter should: (881) [5.3.1]

A. use a longer hose lay to provide less friction loss.
B. close the nozzle slightly to reduce the amount of water flow.
C. check to make sure there are no air leaks in the proportioning device.
D. move the nozzle farther above the eductor to reduce elevation pressure.

A

C. check to make sure there are no air leaks in the proportioning device.

26
Q

What is likely to cause poor quality fire fighting foam to be produced? (882) [5.3.1]

A. Nozzle is fully opened
B. Nozzle is too far below the eductor
C. Hose lay on the eductor side is not long enough
D. Mixing different types of foam concentrates in the same tank

A

D. Mixing different types of foam concentrates in the same tank

27
Q

Which method of foam application is only suitable for use on a pool of liquid fuel on open ground? (882) [5.3.1]

A. Roll-on method
B. Rain-down method
C. Bank-down method
D. Spread-over method

A

A. Roll-on method

28
Q

Which method of foam application would be well suited for a flammable liquid spill near the exterior wall of a building? (882) [5.3.1]

A. Roll-on method
B. Rain-down method
C. Bank-down method
D. Spread-over method

A

C. Bank-down method

29
Q

If a large pool of flammable liquid is burning in an open area, the method of foam application may be the most effective method to use. (883) [5.3.1]

A. roll-on
B. rain-down
C. bank-down
D. spread-across

A

B. rain-down

30
Q

What should firefighters do if the fire begins to spread uncontrollably when they are applying foam? (883) [5.3.1]

A. Apply a greater quantity of foam
B. Switch to a different extinguishing agent
C. Retreat to a safe location while using handlines for protection
D. Move to a different location around the fire while using portable fire extinguisher for protection

A

C. Retreat to a safe location while using handlines for protection

31
Q

Which type of substances have a flash point less than 100°F (38°C)? (883) [5.3.1]

A. Surfactants
B. Flammable liquids
C. Combustible gases
D. Combustible liquids

A

B. Flammable liquids

32
Q

Which statement accurately describes pressurized vessels? (884) [5.3.3]

A. They are color-coded so responders can easily identify the contents.
B. They should be marked with placards or stickers identifying the contents.
C. They must have relief hatches or manholes for easy access to the contents.
D. They will look the same as vessels used to transport or contain flammable solids.

A

B. They should be marked with placards or stickers identifying the contents.

33
Q

Propane is odorless and flammable, so at a response to a reported leak, firefighters should: (884) [5.3.3]

A. repair the propane leak.
B. notify the propane company.
C. isolate the pressure vessel systems.
D. test the stability of the leaking vessel.

A

B. notify the propane company.

34
Q

Any valve operation must be performed in coordination with: (885) [5.3.3]

A. ventilation efforts.
B. salvage and overhaul.
C. facility personnel supervision.
D. a hazardous materials team leader.

A

C. facility personnel supervision.

35
Q

What happens when a BLEVE occurs? (886) [5.3.3]

A. Contaminated water supply
B. Failure of a post indicator valve
C. Fire involving combustible gases
D. Violent rupture of a pressurized container

A

D. Violent rupture of a pressurized container

36
Q

Which is an appropriate safe action to take at an incident involving a BLEVE? (886) [5.3.3]

A. Apply fire fighting foam at a close range
B. Approach the vessel at the ends of the tank
C. Fight fire from the maximum distance possible
D. Attempt to open the vessel’s pressure relief valve

A

C. Fight fire from the maximum distance possible

37
Q

Which action should be avoided during an incident involving a tanker carrying flammable fuels? (887) [5.3.3]

A. Using road flares
B. Using fire fighting foam
C. Applying water for victim protection
D. Allowing a lane of traffic to remain open

A

A. Using road flares

38
Q

At a bulk transport incident, firefighters must: (887) [5.3.3]

A. identify the material involved.
B. retreat until a hazmat team arrives.
C. shut down all lanes of traffic around the incident.
D. continually apply water to the vessel to keep it cool.

A

A. identify the material involved.

39
Q

What action should be taken if a pressurized vessel containing flammable gas is exposed to flames? (888) [5.3.3]

A. Apply a fog stream of water
B. Apply a solid stream of water
C. Apply foam using the roll-on method
D. Apply foam using the bank-down method

A

B. Apply a solid stream of water

40
Q

At an incident involving a gas distribution system, if the gas is burning: (889) [5.33]

A. the flame should not be extinguished.
B. firefighters should approach from downwind.
C. water should be applied to the leak until a hazmat response team arrives.
D. foam should be applied in copious amounts in order to reach extinguishment as quickly as possible.

A

A. the flame should not be extinguished.

41
Q

In order to prevent reignition of a liquid fuel fire after foam has been applied, do NOT: (889) [5.3.1]

A. apply more foam than necessary for extinguishment.
B. apply a solid or straight stream of water to the foam blanket.
C. add any more foam after the surface has been covered once.
D. let the foam sit for more than 5-10 minutes without replenishing it.

A

B. apply a solid or straight stream of water to the foam blanket.

42
Q

At an incident involving flammable liquids or gases, firefighters should immediately retreat to a safe location uphill and upwind of the incident: (889) [5.3.3]

A. once the haz mat team arrives.
B. if the sound of escaping gas starts to get louder.
C. once a foam blanket completely covers the burning material.
D. if they realize that the leak is coming from the distribution system.

A

B. if the sound of escaping gas starts to get louder.

FF II (8 decks)

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