Fire Safety and Combustion Quiz

A chemical reaction between a fuel and an oxidizing agent that produces energy, usually in the form of heat and light.

The amount of heat (in calories) produced when 1 gram of a substance burns completely.

Any liquid that has a flash point between 140°F and 200°F.

Any liquid with a flash point below 140°F and a vapor pressure not exceeding 40 psia at 100°F.

The lowest temperature at which a liquid produces enough flammable vapors to ignite in the presence of a spark or flame.

The highest concentration of a flammable substance in air that will allow a flame to propagate.

The lowest concentration of a flammable substance in air that will allow a flame to propagate.

A fire suppression system where pipes are filled with air or an inert gas, and water is only introduced when the system is activated.

A fire suppression system where water is always present in the pipes, and the sprinkler heads are activated by heat.

A fire suppression system similar to a dry pipe system, but it uses a valve that is opened by a fire alarm or smoke detector, allowing water to flow into the pipes.

A fire suppression system designed for areas where rapid fire spread is a major concern. It uses heat-activated sprinkler heads and a deluge valve to release a large volume of water quickly.

A fire suppression system that uses water spray nozzles designed to protect specific three-dimensional objects or equipment.

A fire suppression system that mixes water with foam concentrate to create a foam blanket to suppress fires.

This class covers energized electrical equipment, wiring, controls, motors, data processing panels, or appliances.

These fires involve combustible cooking media like oils and grease commonly found in commercial kitchens.

New fire extinguisher labeling uses pictures to indicate which fire types the extinguisher can be used on. Red diagonal lines show which fire types the extinguisher should NOT be used on.

The number rating on a Class A fire extinguisher indicates the amount of extinguishing material it contains. For example, a Class A extinguisher rated '1' means it holds 1 gallon of extinguishing material.

The number rating on a Class B or C fire extinguisher indicates the square footage area it can cover. For example, a 5BC rating means it can cover 5 square feet of a Class B or C fire.

A type of automatic sprinkler system that uses water that is frozen until needed. It's often installed in freezing areas like unheated buildings.

A common type of automatic sprinkler system that contains water constantly within the piping system. It's suitable for most locations that are not exposed to freezing temperatures.

This type of system is not tested by hydrostatic pressure when the unit has been repaired by soldering, welding, brazing, or use of patching compounds.

This type of system is not tested by hydrostatic pressure when the cylinder or shell threads are damaged.

The lowest temperature at which a substance will ignite in normal air without an external ignition source (like a spark or flame).

Describes the density of a liquid relative to water. Liquids with a specific gravity less than 1 are lighter than water, while those with a specific gravity greater than or equal to 1 are heavier than water.

Measures the density of a gas or vapor compared to air. Gases/vapors heavier than air (density ≥ 1) tend to sink, while lighter ones (density ≤ 1) tend to rise.

The rate at which a liquid converts to vapor at a specific temperature and pressure. Substances with an evaporation rate less than 1 evaporate faster than butylacetate, which has an evaporation rate of 1.

The maximum amount of a substance that can dissolve in water at a specific temperature and pressure. Commonly used to assess the environmental behavior of chemicals.

The pressure exerted by the molecules escaping from a liquid into a separate vapor phase above the liquid surface.

The temperature at which a substance will continuously burn after ignition. This temperature is higher than its flash point

The range of concentrations of a flammable or explosive substance in air that will allow combustion or explosion.

The minimum concentration of a flammable or explosive substance in air that will allow combustion or explosion.

The maximum concentration of a flammable or explosive substance in air that will allow combustion or explosion.

An area where the quantity and/or combustibility of contents is low, and fires with relatively low rates of heat release are expected.

An area with a moderate level of combustibles where fires are expected to be of moderate severity.

An area where the quantity and/or the combustibility of the contents is high, and fires are expected to be severe.

The maximum spacing allowed between sprinklers in a light-hazard occupancy area.