Why are propane tanks an extreme risk to firefighters quizlet?

Why are propane tanks an extreme risk to firefighters? The tanks will explode when sufficiently heated.

Which method of foam proportioning involves drawing foam concentrate through a hose into the water stream using the Venturi effect?

Cards

Term Ball Valve Definition Valve having a ball-shaped internal component with a hole through its center that permits water to flow through when aligned with the waterway
Term Proportioning Definition Mixing of water with an appropriate amount of foam concentrate to form a foam solution.

Which type of nozzle produces high quality foam by induction air into the foam solution using the Venturi effect?

best against AFFF AND class A foam. AAFN nozzles induct air into the foam solution by a Venturi action.

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Which method of foam proportioning involves drawing foam concentrate through a hose?

Eductor: A proportioning device which uses the vacuum created by the water moving through a venturi to draw concentrate into the hose line. Environment: The complex surrounding an area such as water, air and natural resources and their physical conditions (temperature, humidity, etc.).

Which elements must be blended in the correct ratio to produce finished foam?

How Does Class B foam work on a fire? How is foam solution generated? Foam Concentrate and water are mixed in the correct proportion or ratio with foam proportioner to produce a foam solution. How is finished foam generated?

When a foam concentrate container is labeled 1% or 3% What does that signify?

If the container of foam concentrate has 3% shown, it means that for every 100 gallons of foam solution required, 3 gallons of the foam concentrate must be used in the solution with the balance being 97 gallons of water.

Under what circumstances are multipurpose Class B foams normally mixed at 6 %?

Multipurpose Class B foams are normally mixed at a 6 percent rate when: applied to polar solvents. Factors to consider in selecting a foam proportioner include solution flow requirements, intended use, and: available water pressure.

Polyurethane foam is the most common synthetic foam used in mattresses.

What are the four elements of foam tetrahedron?

Four elements are necessary to produce a quality foam blanket. These elements include: foam concentrate, • water, • air, and • aeration (mechanical agitation).

What does AFFF foam stand for?

Aqueous film forming foam (AFFF, or alcohol resistant AR-AFFF) is a highly effective foam used for fighting high-hazard flammable liquid fires. AFFF is usually created by combining foaming agents with fluorinated surfactants.

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Is Class A foam AFFF?

Class A foams are used to extinguish fires caused by wood, paper, and brush. … Of the fluorinated foams, aqueous film forming foams or “AFFF” are the foams that contain varying amounts and mixtures of PFAS, and of the most concern to human health and the environment.

Is Class A foam corrosive?

Chemguard First Class is a non-corrosive, non-toxic, biodegradable Class A foam concentrate. When mixed with water in the correct proportion, it changes the properties of water.

Why are propane tanks an extreme risk to firefighters?

Why are propane tanks an extreme risk to firefighters? The tanks will explode when sufficiently heated.

How does ventilation impact fire?

Fire ventilation means that fire gases must be vented out, but also that fresh air will flow in (generally). This supply of air normally affects the fire in such a way that the rate of heat release from the fire increases or the fire spreads faster.

Which of the following best describes ignition of combustible liquids?

Which of the following BEST describes ignition of combustible liquids? These must be heated above the flash point before igniting.

Tame a raging fire