單項選擇題If separating effect is not good, which measure should be taken （）

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


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1.單項選擇題If separating effect is not good, we can improve it by （）

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

2.單項選擇題If found oil when we open low oil level plug of separator, it indicates （）

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

3.單項選擇題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.

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

4.單項選擇題Before the oily water separator put into operation, it should be （）

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

5.單項選擇題The time of discharging oil is short, but oily water separator discharges oil frequentlyThe possible reason is （）

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