Q14. (a) With reference to the overhaul of a ship side valve in dry dock explain, as Chief Engineer Officer, what information should be given to the docking company prior to work commencing. (5)
(b) Describe how the valves would be overhauled stating the precautions to be taken before returning the ship to service. (5)
Q12. With reference to large fixed bladed propellers:
(a) describe, with the aid of a sketch, EACH of the following:
(i) the effect of hull fouling; (3)
(ii) operation in clean hull, ballast condition. (3)
(b) explain why fitting a light propeller may be beneficial. (4)
Q13. With reference to defects found in the steelwork of ballast tanks:
(a) explain the factors that may cause defects in ballast tanks; (4)
(b) state, with reasons, areas most likely to be affected and how they may be indicated; (4)
(c) state methods employed to minimise damage, caused by the factors in (a). (2)
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