單項(xiàng)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


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1.單項(xiàng)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

2.單項(xiàng)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

3.單項(xiàng)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

4.單項(xiàng)選擇題The pressure difference of the gauge on the oily water separator increases greatly, the reason is（）

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

5.單項(xiàng)選擇題Oily water separator mis-alarms, the most possible reason is （）

A.separating oil too fast
B.the sensor flushed badly
C.the discharge solenoid value out of order
D.too low heating temperature