单项选择题
Which of the following statements is least likely to cause the ignition of fuel vapors?（）
A.Static electricity B.An open running electric motor C.Loose wiring D.Explosion proof lights
单项选择题 A burning AC motor would be considered what class of fire?（）
单项选择题 Fire dampers prevent the fire spreading through the process of （）.
单项选择题 A fire, occurring in the windings, of an overloaded electrical motor, is considered a （）.
