Question: How does a fire alarm work? 

Answer: i'd worry about the other answer. they can't spell at all.\nthere are many difference ways a fire alarm can work: photoeletric smoke detector\nionization amoke detector\nfire gas detector\nUV and/or IR detectors\nmany differenct types of heat detectors\n\njim davis\na.a.s. fire protection technology\nadvanced fire inspector
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