After stopping oily water separator, sea water should be permitted for ___ minutes, ____ should be closed after stopping pump to reduce oxidation corrosion of inner wall.

[主观题]H．ow to operate oily water separator?

[单选题]The water in an auxiliary boiler should be tested for chloride content to determine ( ).A．total dissolved solidsB．salt contaminationC．water harcnessD．chlorine contamination

[单选题]The water in an auxiliary boiler should be tested for chloride content to determine （）.A . total dissolved solidsB . salt contaminationC . water hardnessD . chlorine contaminatio

[单选题]In a complete oil/water separator, more oil will separate out onto the underside of these plates and travel outwards until it is free to rise into the oil collecting space Whats the meaning of "it" in the sentence above?（）A . a separatorB . oilC .

[单选题]Some doctors thinkthat you should drink a glass of water each morning. You

[单选题]Some doctors thinkthat you should drink a glass of water each morning. You

[单选题]Some doctors thinkthat you should drink a glass of water each morning. You

[单选题]Some doctors thinkthat you should drink a glass of water each morning. You

[单选题]Some doctors thinkthat you should drink a glass of water each morning. You

[单选题]Here some oil in the oily water separator, as a result of its lower （）, will separate and rise into the oil collection space.A . temperatureB . viscosityC . densityD . velocity