A、scale
B、sludge
C、chemicals
D、air
更多“Head tank should be used to remove （） from cooling water.”相关的问题
A、The pressure-vacuum relief valve should be reset B、The tanks should be made seaworthy to prevent contamination C、The tanks should be sounded to make sure the levels are not rising D、The tanks should be marked with a bull stamp on the manifold filling valve
A、doesnt use a drain tank but a head tank B、uses a drain tank not head tank C、uses a drain tank and a head tank D、uses neither a drain tank nor a head tank
A、A.sediment contamination B、B.fuel filter clogging C、C.moisture formation D、D.inadequate transfer pump suction head
A、cylinder head water outlet header B、cylinder jacket inlet main C、heat exchanger inlet connection D、jacket water pump suction line
A、A.the fuel tank fill pipe should be left open to allow vapors to vent from the tank B、B.the engine should be started immediately to prevent vapor lock in the fuel line C、C.all hatches should be opened and all compartments should be ventilated D、D.open the fuel line and drain a small amount of gasoline into the bilge to clear the line of sediment
A、The expansion tank should be topped off B、The thermostatic water regulating valves should be manually opened C、The fuel filters should be changed D、The engine should be turned over slowly with the indicator cocks open
A、Washing water should be recirculated if possible because it has the same electric potential as the cargo tank being cleaned B、The hoses to portable cleaning machines should be disconnected before the machines are removed from the tank C、The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residue D、Steam cleaning and water washing are both capable of generating electrostatic charges within a tank
A、Washing water should be recirculated if possible because it has the same electric potential as the cargo tank being cleaned B、The hoses to portable cleaning machines should be disconnected before the machines are removed from the tank C、The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residue D、Steam cleaning and water washing are both capable of generating electrostatic charges within a tank
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