Q2. State how and why the following machinery items are effected when the maximum service speed of a Vessel is consistently maintained in heavy weather.
A. Intermediate shafting,
B. Propeller shafting,
C. Shafting coupling bolts,
D. Main thrust pads.
Q2. A. Describe the arrangement made in a main structural bulkhead for a watertight door aperture; B. Explain a procedure for ensuring that sliding watertight doors are operated safely. C. Differentiate between the categories of watertight door and state the regulation pertaining each type.
Q1. A. Describe the preparation necessary before the application (in dry dock) of sophisticated or approved long life coating to the underwater surface of the hull;
B. State the significance of the roughness profile.
C. List the different sophisticated costing which are available.
Q5. Regarding the carriage of crude oil and its associated products:
a) (i) State the dangers involved.
(ii) State what publications give guidance on safety.
b) Sketch and describe the operation of an explosimeter suitable for testing pump rooms or tanks.
c) Define the terms lower and upper flammable limits Illustrating your answer by means rough sketch of a hydrocarbon vapour oxygen graph.
Q6. Explain why the bilging of empty double-bottom or deep tanks below the waterline leads to an increase in GM. B. A ship of 10,000 tonnes displacement has GM=0.5 metres. The period of roll in still water is 20 seconds. Find the new period of roll if a mass of 50 tonnes is discharged from a position 14 metres above the centre of gravity.
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