Fire Extinguishers

No, the carbon dioxide needs to be compressed before hand, otherwise it'd just escape from the nozzle when it's released - as opposed to being pressurised, which is what you want.

A pure CO2 fire extinguisher is recharged by pouring in liquid C02. It usually takes a professional refilling company to determine the proper amount and to pour it in safely. Dry ice, crushed to get it into the extinguisher tank, can also be used.

Yes, fire exstinguisher needs to be carried in the cab

Usually by cutting off the air to the fire. They either blanket the fire under a layer of CO2 gas, or spray a powder that cuts off the air.

A water-type or water-based foam type of extinguisher should not be used on an electrical fire because water and foam are electrical conductors and could result in electrocution of the person using the extinguisher or anyone stepping in the water.

Correct as they may not displace enough O2 to put the fire out-causing it to reignite.

This is a fire in its beginning stage, that which can be controlled with a portable fire supression device such as a fire extinguisher or small water hose system.

Depending upon what type of extinguisher, there may be both.

When water is used, it is a physical change, as water is converted to steam and the heat is removed from the fire.

When a dry chemical is used, it is a physical change as the powder cools the fire, but also a chemical change that affects the speed of combustion.

A foam-type extinguisher physically cools the fire but, more importantly, establishes a chemical layer of oxygen-starved foam on the surface of flaming liquids.

A CO2 extinguisher cools a fire (at minus 130 F), but also pushes out the oxygen-rich air and replaces it with CO2 gas, which does not burn well at normal temperatures.

For a Class D extinguisher, related to flammable metals, it is typically a chemical change that converts the surface of the burning metal to something inert.

Similarly, a Class K (or F) kitchen extinguisher converts the surface of burning vegetable oils to a soapy substance that no longer burns.

You would only heat the rock. Heated rocks are used in some spas & put on your spine.

Yes, primarily to fish. The retardant is a fertilizer slurry. When dropped in water, the fertilizer turns to ammonia, which is toxic to fish and some other aquatic organisms. The degree of toxicity depends upon the dilution factor. Retardant drops in small streams have been known to kill trout for several miles downstream.

Unless there is local fire code to the contrary, there is no requirement for any fire extinguishers in a one- or two-family dwelling, under National Fire Code.

If the landlord wants you to have one, it will be installed by the landlord; if you want one for your own use, you can buy one and install it with permission of the landlord.

B refers to Class B fuel, i.e., flammable/combustible liquid or gas.

Class K extinguishers are used on Class K fires.

Yes, Fire Extinguisher body made of mild steel iron

To safely empty an antique carbon tetrachloride fire extinguisher, first ensure you are in a well-ventilated area and wear appropriate personal protective equipment, such as gloves and goggles. Carefully release any remaining pressure by slowly opening the valve, allowing the contents to discharge into a suitable container. Dispose of the carbon tetrachloride according to local hazardous waste regulations, as it is toxic and environmentally harmful. Finally, consider consulting a professional for proper handling and disposal if you are unsure.

Carbon dioxide extinguishers are typically identified by their black color. This color coding helps distinguish them from other types of fire extinguishers, which may be painted in different colors to indicate their contents. The black color indicates that the extinguisher is designed for use on electrical fires and flammable liquids. Always check the label for specific usage instructions and safety information.

Yes, there have been several improvements to fire extinguishers in recent years. Innovations include the development of smart fire extinguishers that can connect to smartphones for alerts and maintenance reminders, as well as the use of more environmentally friendly extinguishing agents. Additionally, advancements in design have led to lighter, more portable models that are easier to use, along with improved visibility features to help locate extinguishers in emergencies. These enhancements aim to increase effectiveness and user accessibility in fire safety.

When an extinguishing agent covers and cools the fire source, the fire loses its ability to sustain combustion. This happens because the agent reduces the temperature below the ignition point and interrupts the chemical reaction necessary for the fire to continue. Additionally, by smothering the flames, the agent restricts the oxygen supply, further inhibiting the fire's growth.