Exam Question
(a) Sketch a simple line diagram showing a shipboard oil-water separator in series with a coalescing second stage (10)
(b) Describe the arrangement and operation of the separator sketched in (a) (10)
Class 4 (4th Engineer)
SSEP
📅 Mar 2024
Reference Answer
### (b) Arrangement and Operation of a Two-Stage Oily Water Separator
#### 1. Principle of Operation
The primary purpose of a shipboard Oil Water Separator (OWS) is to process oily bilge water, separating the oil from the water to an extent that the effluent water can be legally discharged overboard in compliance with MARPOL Annex I regulations. The current international standard for discharge within Special Areas and for all ships built after 2005 is a maximum oil content of 15 parts per million (ppm).
The system described operates on a two-stage principle:
#### 1. Principle of Operation
The primary purpose of a shipboard Oil Water Separator (OWS) is to process oily bilge water, separating the oil from the water to an extent that the effluent water can be legally discharged overboard in compliance with MARPOL Annex I regulations. The current international standard for discharge within Special Areas and for all ships built after 2005 is a maximum oil content of 15 parts per million (ppm).
The system described operates on a two-stage principle:
Full answer on MeoMock — surveyor-grade reference answers for 7,000+ written exam questions.
Prepare on Android — MeoMock on Google Play