A.soda acid
B.foam
C.CO2
D.sand
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A.stopping the flow of gas
B.reducing the chemical chain reaction
C.increasing the oxygen supply
D.cooling below the autoignition point
A.burner valve
B.root valve
C.quick closing valve
D.oil return valve
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
A.foam
B.CO2
C.low velocity water fog
D.high velocity water fog
A.close the vent
B.pump out the tank
C.activate the fixed CO2 system
D.cut off the heating coils
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When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
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The condensers located in various stages of a flash evaporator are cooled by（）
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