单项选择题
A.gas freed B.inerted C.filled with water D.all of the above as necessary
Which of the following statements is least likely to ca...
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
A burning AC motor would be considered what class of fi...
单项选择题A burning AC motor would be considered what class of fire?（）
A.Class "A" B.Class "B" C.Class "C" D.Class "D"
Fire dampers prevent the fire spreading through the pro...
单项选择题Fire dampers prevent the fire spreading through the process of （）.
A.convection B.conduction C.radiation D.direct contact
