- Can water make water wet?
- How do you fight fire with water?
- Is 40 too old to become a firefighter?
- Is Afff Class A or B?
- What is wet water fire fighting?
- Why do firefighters use foam instead of water?
- Do firemen sleep at the station?
- How long is a fireman’s shift?
- What chemicals do firefighters use?
- Can you use salt water to fight fires?
- How do fire trucks get water?
- Do firefighters use fresh water?
- How do fire hydrants get water?
- How can you make water wetter?
- What is in fire fighting foam?
- What do firefighters do when there’s no fire?
- What is class A foam made of?
- What water do firefighters add?
Can water make water wet?
New scientific information suggests that water doesn’t behave as a liquid until after there are more than six molecules.
So, by the definition of wet, which is the condition of being covered or soaked in liquid, then water isn’t wet, it just makes other things wet..
How do you fight fire with water?
The most common method is to use water to put out the fire. The water takes away heat by cooling the fire. Water also smothers the fire, taking away oxygen. Some firefighters use foam as an alternative to water.
Is 40 too old to become a firefighter?
Some departments set age 39 or 40 as the maximum they will consider. You also can check their websites. Check the department’s education and certification requirements. Some municipal fire departments require state certification as a firefighter before hiring.
Is Afff Class A or B?
Class B Foam (also called AFFF): Used to extinguish Class B materials, which include gasoline, oil, and jet fuel.
What is wet water fire fighting?
Wetting agents simply improve the efficiency of water in extinguishing Class A fuel fires. Water to which a wetting agent has been added is sometimes referred to as “wet water” because of its increased ability to wet surfaces to which it is applied.
Why do firefighters use foam instead of water?
Firefighting foam is a foam used for fire suppression. Its role is to cool the fire and to coat the fuel, preventing its contact with oxygen, resulting in suppression of the combustion. … The surfactants used must produce foam in concentration of less than 1%.
Do firemen sleep at the station?
Firefighters often spend 24 hours at a time at the firehouse followed by 48 hours off duty. During this time they eat, sleep, shower, work and relax at the firehouse. So, they essentially live at the firehouse for approximately 1/3 of their career.
How long is a fireman’s shift?
A full-time firefighter works an average of 56 hours per week, but the work hours are divided into 24-hours shifts. Some departments schedule firefighters to work eight or 12-hour shifts, but this is not the usual practice.
What chemicals do firefighters use?
Chemical products which react with the fuel can be used to stop the combustion. A layer of water-based fire retardant foam can be applied by the fire hose in order to separate the oxygen in the air from the fuel. carbon dioxide, halon, or sodium bicarbonate can be used.
Can you use salt water to fight fires?
Yes, salt water can be used to put out wildfires. However, salt water can harm plant life: some species are sensitive to salinity levels. Thus, using salt water may not be a wise first choice in firefighting methods in certain environments.
How do fire trucks get water?
The large black pipes on the side of the engine are the hard suction lines. The primary function of any pumper/tanker fire engine is to carry water in a water tank or suck water in from an outside source, such as a fire hydrant, drop tank, swimming pool or lake. …
Do firefighters use fresh water?
Most firefighting aircraft are capable of dropping either salt or fresh water. However, for helicopters that are equipped with bellytanks that use hover-fill pumps, or with buckets on ‘short’ lines, we do tend to prefer to use fresh water if possible.
How do fire hydrants get water?
Fire hydrants are connected to a large water supply through underground pipes. When firefighters arrive on the scene, they connect a hose to the side of the hydrant. … Once the nut is turned, it opens a valve deep underground that allows water to start to flow into the hydrant.
How can you make water wetter?
Water becomes “wetter” by lowering its surface tension. The surface tension of water is a force that defines its behavior. This can be viewed by filling a glass over the rim with water, or by placing drops of water on a hard surface.
What is in fire fighting foam?
FOAM: A fire fighting foam is simply a stable mass of small air-filled bubbles, which have a lower density than oil, gasoline or water. Foam is made up of three ingredients – water, foam concentrate and air.
What do firefighters do when there’s no fire?
Firefighters sweep, mop, throw out the trash, dust, wash linens and windows, and clean the fire trucks. We also take care of small maintenance issues such as painting. Public Outreach – Firefighters often provide station tours for the public or speak at special events.
What is class A foam made of?
Class A foams consist of a mixture of water, foam concentrate, and air. The composition of the foam depends on the proportion of the three components. The two most common methods for producing class A foam are nozzle-aspirated foam systems and compressed air foam systems (CAFS).
What water do firefighters add?
As a synthetic based foam concentrate, Class A foam is applied at low concentrations ranging from 0.1% to 1.0% (see proportioning rates below). Cooling and wetting are the primary extinguishing mechanisms. The use of Class A foam makes “water wetter” on average increasing the effectiveness of water tenfold.