Q1) Fire Tetrahedron: The fire tetrahedron is a four-sided geometric representat
ID: 373760 • Letter: Q
Question
Q1)
Fire Tetrahedron:
The fire tetrahedron is a four-sided geometric representation of the four factors necessary for fire: fuel (any substance that can undergo combustion), heat (heat energy sufficient to release vapor from the fuel and cause ignition), oxidizing agent (air containing oxygen), and uninhibited chemical chain reaction (sufficient exothermic reaction energy to produce ignition). The fuel/air ratio must within flammable limits, which describes the amount of vapor in air necessary to propagate flame. Removing any of these four factors will prevent, suppress, or control the fire.
Q2)
A fire extinguisher, rated not less than 2A, shall be provided for each 3,000 square feet of the protected building area, or major fraction thereof. Travel distance from any point of the protected area to the nearest fire extinguisher shall not exceed 100 feet.
Q3)
Flammable liquids shall not be stored in areas used for exits, stairways, or normally used for the safe passage of people.
Q4)
Portable fire extinguishers shall be inspected periodically and maintained in accordance with Maintenance and Use of Portable Fire Extinguishers, NFPA No. 10A-1970.
Q5)
No more than 25 gallons of flammable liquids shall be stored in a room outside of an approved storage cabinet
Explanation / Answer
a) draw the composite curves for a DTmin of 10 °C
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