Exam Question

### (a) Sketch a simple line diagram showing a shipboard oily water separator in series with a coalescing second stage (8)
*(As per instructions, a sketch cannot be generated here. The user is expected to draw this by hand based on the `image_search_query` provided. The diagram should show the flow path of oily water through a primary separation chamber and then a secondary coalescing filter stage, with separate outlets for clean water and separated oil.)*
### (b) Briefly describe the above arrangement and its operations; also state the allowable oil content in p.p.m. of the discharge effluent from such an arrangement (8)
#### Description of Arrangement: