A.Ⅰ+Ⅱ+Ⅲ+Ⅴ
B.Ⅰ+Ⅱ+Ⅲ+Ⅳ
C.Ⅰ+Ⅳ+Ⅴ+Ⅵ
D.Ⅰ+Ⅱ+Ⅲ+Ⅵ

A.filled with clean water before operation
B.keep air cushion in oil collecting space during running
C.check oil level during running
D.clean inner separator with low pressure stream

A.pay attention to operating parameters
B.renew and clean separating units in time
C.check oil level in separator to prevent overload
D.check separating effect, if it is bad, flush with large capacity water pump

A.overhauling every two year
B.working at intervals
C.renewing filtration material
D.pumping bilge water from different layers respectively

A.working at intervals and properly heating
B.warming up to 70℃, increase water supply flow
C.improving impulse of water supply
D.reducing water supply flow

A.flushing separator with hot water
B.increasing water supply flow
C.heat oily water properly
D.opening manual oil discharge value

A.the separator is overload
B.the monitor equipment of separator fails
C.the discharge pump of separator can not work
D.the temperature of oil water is low

A.15；inlet value
B.15；inlet and outlet value
C.30；inlet value
D.30；inlet and outlet value

A.filled with bilge water
B.filled with oil
C.filled with clean water
D.be emptied

A.the sensor of low oil level is fully covered by sludge
B.the coarse strainer before the pump in suction system is clogged
C.the screw pump is worn seriously and volumetric efficiency is decreased
D.bilge suction value is clogged

A.the filter is clogged
B.bilge suction value is clogged
C.suction value and discharge value of the pump do not open fully
D.screw pump is worn seriously and volumetric efficiency is decreased