单项选择题
A.burner valve B.root valve C.quick closing valve D.oil return valve
Spontaneous combustion could occur in（）A.paint thinner ...
单项选择题Spontaneous combustion could occur in（）
A.paint thinner in an open can B.fuel accumulation in the bilge C.oily rags in an unvented compartment D.gasoline stored in steel drums
All classes of fires can be safely combated using（）A.fo...
单项选择题All classes of fires can be safely combated using（）
A.foam B.CO2 C.low velocity water fog D.high velocity water fog
If there were a fire in the bunker tanks, you would（）A....
单项选择题If there were a fire in the bunker tanks, you would（）
A.close the vent B.pump out the tank C.activate the fixed CO2 system D.cut off the heating coils
