Fire Safety and Workplace Hazards

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Class A Fire

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a fire involving ordinary materials like paper, cardboard, and wood that is extinguished with water.

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Class B Fire

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a fire that involves flammable liquids and is extinguished with either a dry chemical, or a carbon dioxide (CO2) extinguisher.

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Class C Fire

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an electrical fire that is extinguished with a carbon dioxide (CO2) fire extinguisher.

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Class D Fire

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a combustible metal fire that is extinguished with dry powder extinguishing agents.

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Class K Fire

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a cooking oil or fat fire that can be extinguished with CO2 (carbon dioxide), dry powder extinguishing agents, or occasionally, by smothering.

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Ground

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a source that absorbs stray electrical charge.

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Ground Fault Circuit Interrupter (GFCI)

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a device that protects people from dangerous levels of electrical current by measuring the current difference between two conductors of an electrical circuit.

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Hazard

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any possible source of danger.

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Horseplay

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practical jokes and playful activity, which is always inappropriate on a construction site.

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Inhalation

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breathing in a substance, typically in the form of gas, fumes, or dust.