单项选择题
The four basic components of a fire are chain reaction, heat, fuel, and （）.
A.carbon monoxide
B.oxygen
C.carbon dioxide
D.any gaseous substance
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相关考题
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单项选择题
The FIRST step to take in fighting an engine room fire resulting from a ruptured fuel oil service line, is to （）.
A.evacuate all engine room personnel
B.fight the fire with hand portable extinguishers
C.activate the main CO2 bank
D.stop the flow of leaking fuel oil -
单项选择题
The four basic components of a fire are fuel, heat, oxygen and a chain reactionWhich of the following statements best describes what must be eliminated to extinguish a fire?（）
A.Any one component can be eliminated to extinguish a fire
B.Any two components must be eliminated to properly extinguish a fire
C.Any three components must be eliminated to properly extinguish a fire
D.Ali four components must be eliminated to extinguish any fire -
单项选择题
A fire can be extinguished by removing （）.
A.the heat
B.the fuel
C.the oxygen
D.any of the above
