A.100%
B.1/2
C.1/5
D.1/3
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A.seal water supply be cut off
B.make up water supply be cut off
C.oil outlet valve closed or not open sufficiently
D.the flow rate of oily water is too much
A.both as clarifiers
B.first one as clarifiers, second one as purifier
C.both as purifiers
D.first one as purifier, second one as clarifier
A.the plant should be prohibited to supplying air
B.the plant should work at intervals
C.the plant should be added disinfector in time
D.we should check strength of activated sludge, ivory-white color is best
A.chlorine water
B.ozone
C.hypo-calcium chloride
D.calcium oxide
A.deposition chamber
B.oxidation pool
C.disinfection chamber
D.all chamber
最新試題
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
Using a file without a handle may result in （）
The main purpose of port State control is not to（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
The condensers located in various stages of a flash evaporator are cooled by（）
If separating effect is not good, which measure should be taken （）
Engine parameters shall be corresponded to NOx Technical Files. This is required by （）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
（） is not installed on the main switchboar.