Exam 21: Fire Hazards and Life Safety

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Class C fires involve combustible, easily oxidized metals such as aluminum, magnesium, titanium, and zirconium.

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False

Fires are classified according to their properties, which relate to the nature of the fuel. What class of fire has a metal fuel?

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E

What are the four elements of the fire tetrahedron?

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C

The explosive range of a material refers to the distance from the source that a given volume can travel if ignited.

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The by-product of combustion is energy in the form of light.

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Most gases are heavier than air.

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National Fire Protection Association statistics show that most people die in fires from what cause?

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Which of the following are products of combustion?

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What are the three elements required for starting and sustaining fire?

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Cooling is one of the principal ways to control a fire or extinguish it.

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The blue area an NFPA 704 label identifies health hazards.

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Fire hazards are conditions that favour fire development or growth.

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Flammable liquids have a higher flash point than combustible liquids.

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What term is used to describe a chemical reaction that creates heat?

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The elements represented in the fire tetrahedron are fuel, oxygen, and heat, and ignition.

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What is the temperature at which a given fuel can burst into flame?

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CO2 would be a suitable extinguishing agent for which classes of fires?

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Exothermic chemical reactions consume more heat than they generate.

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Chemical reactions in a fire break down materials into basic elements

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The fire point is the lowest temperature for a given fuel at which vapours are produced in sufficient concentrations to flash in the presence of a source of ignition.

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