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The PASS device sounds a loud (95 decibel) [1] audible alert to notify others in the area that the firefighter is in distress. On a fireground, the sound of an activated PASS device indicates a true emergency and results in an immediate response to rescue the firefighters in distress.
Spraying water on the ceiling in short pulses of a diffused spray (e.g., a cone with an opening angle of 60°) can be undertaken to test the heat of smoke: If the temperature is moderate, the water falls down in drops with a sound like rain; if the temperature is high, the water vaporizes with a hiss—the sign of a potentially extremely ...
A vehicle outfitted for firefighting, specifically one outfitted to pump water. Many rural fire engines carry a reservoir of water to pump, and use drafting and water tenders to obtain further supply. Historically, an engine ("enjin" or other spellings) was any kind of machine, tool or "contrivance".
[5] [6] De la Tour's siren could produce sound under water, [7] suggesting a link with the sirens of Greek mythology; hence the name he gave to the instrument. [8] Instead of disks, most modern mechanical sirens use two concentric cylinders, which have slots parallel to their length. The inner cylinder rotates while the outer one remains ...
Blood rain; Cold drop (Spanish: gota fría; archaic as a meteorological term), colloquially, any high impact rainfall event along the Mediterranean coast of Spain; Drought, a prolonged water supply shortage, often caused by persistent lack of, or much reduced, rainfall; Floods. Flash flood; Rainstorm; Red rain in Kerala (for related phenomena ...
Emergency responders along an icy Interstate 94 in Comstock Township, Michigan, ran for their lives Thursday morning when a box truck driver lost control, skidded along the slippery highway and ...
Sleet and freezing rain occur by a similar process, but are different forms of precipitation. Both are most common in the winter. Sleet occurs when snowflakes melt into a raindrop in a wedge of ...
An early device used to squirt water onto a fire is a squirt or fire syringe. Hand squirts and hand pumps are noted before Ctesibius of Alexandria invented the first fire pump circa the 2nd century B.C., [ 3 ] and an example of a force-pump possibly used for a fire-engine is mentioned by Heron of Alexandria .
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