“Smoke” leaving a structure has four key attributes: volume, velocity (pressure), density, and color. A comparative analysis of these attributes can help the fire officer determine the size and location of the fire as well as the potential for a hostile fire event like flashover.
When reading smoke the smoke density is an indication of?
3. DENSITY indicates the color of smoke, the quality of burning, and the severity of the event. A. The thicker the smoke, the more likely a hostile spread event.
How do firefighters communicate in a fire?
Firefighters are continuously surrounded by communication in all forms: the opening hiss of the alarm speakers, checking and cross-checking dispatch information in the cab, the commanding voice of the first arriving officer, or the thick, dark smoke pushing around the front door with a sticker stating “Oxygen in use.” …
What color is smoke when fire is burning?
As solid materials first start to burn they emit white smoke which is moisture from the object, as it dries it changes colors. If the smoke turns brown or tan it usually means wood materials are burning, possibly the structure itself. If it turns gray it is either a plastic or painted/stained surface.
What can smoke symbolize?
In art, smoking initially symbolised death, but came later to symbolise modernity, youth and nervous excitement. In literature, smoking is often used to evoke individuality and eccentricity, as is the case with Sherlock Holmes.
What burns the most when smoking?
The more intense the fire, the more complete the combustion process and a bigger percent of the smoke will be carbon dioxide and water vapor.
What does purple smoke mean?
The violet-colored smoke grenade was used in-theater because of its vivid color; previously it was only used in the United States for training. … When a ground element popped smoke to identify its location to aircraft, the aircraft was not told the color, but told to identify the color they saw.
What determines the color of smoke?
The color of the smoke depends on the material that is burning. Natural materials such as unfinished wood will change to tan or brown colored smoke, whereas plastics and painted surfaces appear to be grey in color. However, black smoke can appear grey when it is mixed with moisture from other heated materials.
What causes turbulent smoke?
The turbulent flow is caused by the rapid expansion of the smoke due to the heat built up within the building. In essence, the building cannot absorb any more heat and is unable to hold the rapid expansion of smoke.
What is the most common built in fire suppression device which has been used for over 100 years?
The Chemical Transportation Emergency Center, also known as CHEMTREC. What is the most common built-in fire suppression device, which has been used for over 100 years? Automatic sprinklers.
Is there smoke without fire?
there’s no smoke without fire where there’s smoke there’s fire. If someone says there’s no smoke without fire or where there’s smoke there’s fire, they mean that there are rumours or signs that something is true so it must be at least partly true.