Oil Water Separator Assessment

Which of the following is the primary reason for using an Oil Water Separator (OWS) on a ship?

• To prevent corrosion in the ship's engine

• To comply with air pollution regulations

• To prevent the discharge of oily water into the sea

• To increase engine efficiency

If the oil content in the water exceeds 15 ppm, the OWS system will most likely:

• Continue discharging the water overboard

• Recirculate the water for further treatment

• Shut down automatically

• Alarm the crew but still discharge the water

What is the key purpose of the gravity separation stage in the OWS process?

• To filter out solid particles

• To allow lighter oil to float and heavier water to sink

• To increase the flow of bilge water

• To add chemicals to purify the bilge water

Which component of the OWS helps in combining smaller oil droplets into larger ones?

• Oil content monitor

• Gravity separator

• Coalescer filter

• Polishing filter

What is the primary function of the Oil Content Monitor (OCM) in the OWS system?

• To detect the water's salinity

• To measure the oil concentration in the water

• To control the flow of bilge water

• To filter the oily water

Why is the coalescing stage essential after the gravity separation stage in an OWS?

• To reduce the temperature of the bilge water

• To remove larger debris from the water

• To remove oil that did not separate during the gravity process

• To neutralize the pH of the bilge water

What might be the consequence of bypassing the polishing filter in an OWS system?

• The water discharged may have high oil content

• The oil will not separate from the water

• The oil content monitor will malfunction

• The bilge tank will overfill

If the bilge water entering the OWS has a high concentration of solid particles, what problem might this cause?

• Reduced oil separation efficiency

• Faster flow of water through the system

• Reduced temperature of the bilge water

• Increased efficiency of the coalescing filter

Which of the following scenarios may indicate a malfunction in the OWS system?

• The oil content is continuously below 5 ppm

• The OCM reads a constant 15 ppm with no fluctuation

• The water flow rate increases during operation

• The oil-water mixture is not separating effectively

Which international convention primarily governs the use of OWS systems on ships?

• SOLAS

• MARPOL Annex I

• STCW

• ISM Code