The ignition source that caused the disaster
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How many categories are there of fire sources that cause disasters? What are they respectively?
Four categories: open flame, electrical fire source, chemical fire source, thermal fire source!
There are four types: open flames, electrical fire sources, chemical fire sources, and hot objects as fire sources
There are four types: open flames, electrical fire sources, chemical fire sources, and hot objects as fire sources. Open flames include stoves with an open flame, the flame from gas welding, gas stoves, blowtorches, and alcohol lamps, etc； Electric energy sources such as welding sparks, switch sparks, and arcs ； Chemical energy sources such as chemical reactions like oxidation, nitration, decomposition, and polymerization ； Hot objects that serve as sources of fire, such as soldering irons and light bulbs
Are there 5 categories of fire sources that cause disasters? They are open flame, arc and spark, lightning strike, high temperature, and spontaneous combustion ignition sources.