Referring to the illustration, an oil/water...

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Question 1 of 2066636eee28f7522a1c51f142

Referring to the illustration, an oil/water separator is in the recirculation mode due to high oil content of the processed water outlet. What action may be required before the unit is capable of discharging overboard once again? Illustration GS-0175

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Question 1 of 20

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🔍 Key Concepts

• Oil/water separator (OWS) operation when the oil content detector (OCD) senses high ppm and sends flow to recirculation instead of overboard • Effect of using detergents/emulsifying agents in bilge water on the separator’s ability to remove oil and on MARPOL/33 CFR compliance • Difference between correcting a sensor/monitoring issue and changing conditions in the bilge or suction piping

💭 Think About

• When the unit switches to recirculation, what exactly is triggering that change in flow, and where in the system is that device located on the illustration? • Which actions in the choices would actually help the OWS separate oil from water better, and which would either make separation harder or are discouraged/illegal under pollution regulations? • Is the problem more likely with the flow of bilge water to the unit, or with the device that measures oil content and controls the overboard/recirculation valve?

✅ Before You Answer

• Identify on the diagram where the oil content monitor/detector is and how it is connected to the overboard/recirculation line. • Eliminate any options that involve adding emulsifying or detergent agents to bilges, considering how these affect oil/water separation and regulatory compliance. • Decide whether improving bilge suction flow would change the ppm reading, or whether maintenance on the oil content detection/monitoring side is the more relevant action.

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