单项选择题
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
A fire, occurring in the windings, of an overloaded ele...
单项选择题A fire, occurring in the windings, of an overloaded electrical motor, is considered a （）.
A.class "A" fire B.class "B" fire C.class "C" fire D.class "D" fire
