单项选择题
A.notify the engineer on watch
B.isolate and secure the piping
C.throw sand on the fire
D.extinguish the fire using a combination nozzle with applicator
单项选择题 The four basic components of a fire are chain reaction, heat, fuel, and （）.
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 （）.
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?（）