2, A fire extinguisher with a volume of 1.0 ft initially contains CO2 at 20 °C and atmospheric pressure and weighs 25 pounds (total). After being charged with CO2 to a pressure of 300 psig at 20 °C, what is the weight of the extinguisher? Do not assume ideal gas behavior of …
In the hands of trained personnel, portable fire extinguishers are the first line of defense against incipient fires, but in order to be useful they need to be accessible. This blog tackles the topic of portable fire extinguisher placement, both how portable fire extinguishers should be distributed and exactly where they are allowed to be placed. The first step is to …
Solved A fire extinguisher is filled with 1.0 kg of nitrogen
A fire extinguisher is filled with 1.0 kg of nitrogen gas at a pressure of 1.2 x10^6 N/m2 and a temperature of 20 degrees C. (a) What is the volume of this gas? (b) If the gas is allowed to escape adiabatically against atmospheric pressure, what will be the volume and temperature of the expanded gas?
A: The number in front of the "A" measures water equivalency. One A is equivalent to 1.25 gallons of water, so a unit with a 4A rating has an equivalent of 5 gallons of water to battle Class A fires. B: The number in front of the "B" is a relative measure of the area an extinguisher can cover. C & K: These letters indicate that an extinguisher …
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What does 4A mean on a fire extinguisher?
One A is equivalent to 1.25 gallons of water, so a unit with a 4A rating has an equivalent of 5 gallons of water to battle Class A fires. B: The number in front of the "B" is a relative measure of the area an extinguisher can cover.
What is the difference between fire extinguisher 1 and 2?
In practical terms, that means that if Fire Extinguisher 1 has a 4-A:80-B:C rating and Fire Extinguisher 2 has a 1-A:10-B:C rating, Fire Extinguisher 1 is… Both extinguishers can combat class C fires.
What is the floor area of a Class A fire extinguisher?
The maximum travel distance is often the limiting factor but for certain Class A extinguishers there is an additional floor area limitation. This maximum floor area that a single extinguisher can cover is directly related to the numerical A rating and level of hazard occupancy but reaches a maximum of 11,250 ft 2.
What do the numbers on a fire extinguisher mean?
One A is equivalent to 1.25 gallons of water, so a unit with a 4A rating has an equivalent of 5 gallons of water to battle Class A fires. B: The number in front of the "B" is a relative measure of the area an extinguisher can cover. C & K: These letters indicate that an extinguisher can be used effectively against these fire classes.
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Reference:
https://www.usfa.fema.gov/
https://en.wikipedia.org/wiki/Fire_extinguisher