The time of discharging oil is short, but oily water separator discharges oil frequentlyThe possible reason is （）<br>A:the sensor of low oil level is fully covered by sludge<br>B:the coarse strainer before the pump in suction system is clogged<br>C:the screw pump is worn seriously and volumetric efficiency is decreased<br>D:bilge suction value is clogged

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

出自：海船船员证

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