A、slightly acidic
B、slightly alkaline
C、no salty
D、slightly bitter
更多“When the water produced from most evaporator is supplied for drinking purpose, it must be treated to ensure it is biologically pure and （）.”相关的问题
A、Any time the vessel moves from water of one density into waters of a different density B、Prior to getting underway when the vessel is floating in fresh or brackish water C、Only when the vessel moves from fresh water into salt water D、The density of the water is not required to be logged in the unofficial logbook
A、A.the provision to be provided when the vessel sails in fresh water area B、B.the fresh water to be carried by a vessel C、C.the allowance of fresh water for each crew member when in distress at sea D、D.the amount of free board decreased when sailing in fresh water area
A、the ventilation pipe B、the water line for fire fighting on the deck C、the fuel oil line D、the water supplying line in bath room
A、to cut down the amount of cooling water needed B、to prevent an excess amount of cooling water from being discharged to the bilges C、to supply hot water to the evaporator for more economical operation D、None of the above is tree
A、is usually cooled by sea water B、can be replaced when worn out C、is in direct contact with the water in the bore of the cylinder D、can t expand when heated
A、Once a day B、At the change of every watch C、Only when in fresh or brackish water D、Prior to getting underway
A、five to seven times the depth of water B、seven to ten times the depth of water C、twice the depth of water D、twice the depth of water plus the range of tide
A、Contain the oil and remove as much of it as possible from the water B、Throw chemical agents on the water to disperse the oil C、Throw sand on the water to sink the oil D、Obtain your permit from the Corps of Engineers
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