- With reference to Oily Water Separators (OWS) and the pumping of bilges, explain EACH of the following:
(a) why a positive displacement pump is preferable to a centrifugal pump as the main bilge pump;(2)
(b) why it is important that the flow rate to the separator is not exceeded;(2)
(c) why the discharge overboard line should be higher than the OWS;
(2)
(d) how detergents used for bilge cleaning can affect the operation of the separator;(2)
(e) why an air release is fitted to the top of the shell of the OWS,(2)
- With reference to Annex 1 of the MARPOL convention, state EACH of the following:
(a) the appropriate system to be fitted on a vessel 400GRT or above;(4)
(b) the documentation required, explaining why it is required;(2)
(c) the information to be recorded when pumping bilges overboard through an oil water separator.(4)
- With reference to Oily Water Separators and the pumping of bilges, explain the purpose of EACH of the following:
(a) a bilge holding tank;(2)
(b) an oil drain tank;(2)
(c) an oil content discharge monitor;(2)
(d) a vacuum breaker;(2)
(e) an oil detection probe.(2)
- With reference to the use of Oily Water Bilge Separators:
(a) state, with reasons, the type of pump which should be used;(3)
(b) explain the effect of the bilge water feed rate on the performance;(3)
(c) explain the purpose of EACH of the following:
(i) a bilge holding tank;(2)
(ii) an oil content discharge monitor.(2)
- Describe, with the aid of a sketch, a single stage static Oily Water Separator designed to meet MARPOL Annex I requirements.(10)
3.(a) State the SIX MARPOL annexes which are currently in force.(6)
(b) With reference to MARPOL Annex VI and Oxides of Nitrogen (NO), state which engines have to comply with the legislation.(2)
(c) State TWO other pollutants that Annex VI is designed to limit.(2)