Sketch a static oily water separator intended to handle large quantities of heavily contaminated water. Label the principal components, show the internal arrangement of sub-division, baffles and fittings, indicate the direction of fluid flow in all parts (8)

(a) Describe how it operates. (2)

(b) Give two reasons why oil might be carried over with the water. (2)

(c) How the level of oil separated is controlled? (2)

(d) Explain the principle on which the oil content meter (OCM) works. (2)