单项选择题
In sewage treatment, the term maceration refers to the process of （）
A.breaking up solid matter into fine particles
B.precipitating non-decomposed waste in a collection tank
C.chemically adjusting the sewage ph to 7-0
D.eliminating bacterium coli from the sewage
点击查看答案&解析
相关考题
-
单项选择题
Which of the equipment listed is most effective in processing bilge slops for overboard discharge?（）
A.100PPM oily water separator
B.Assembling the lube oil purifier as a separator and aligning bilge overboard
C.A 15PPM oily water separator
D.A magnetic duplex strainer -
单项选择题
If you heard a ‘crackling’ noise in centrifugal pump, the most probable cause of the problem would be（）
A.insufficient speed
B.cavitation
C.excess discharge pressure
D.excessive net positive suction head B -
单项选择题
The valve which is most suited for regulating the flow through a pipeline is a （）
A.gate valve
B.globe valve
C.swing-check valve
D.plug-cock valve
