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Q3. With regard to ship construction details for transverse watertight bulkheads: -

A. State the purpose of this type of bulkhead;

B. State how the bulkheads are tested for water tightness;

C. If it is necessary to penetrate the bulkhead, precaution must be taken to ensure that the watertight integrity and the strength of the bulkhead is maintained. In view of above, describe, using simple sketches, how the following pass through bulkheads.

i. Main transmission shaft;                ii. Electrical cables;

iii. Fuel oil transfer pipes;                iv. Air and sounding pipes.

Q8. i) What are the classes of bulkheads used under structural fire protection of ships. (5)

ii) Explain the areas as to where these are used and why? (5)

iii) Name the tests carried out on these types of bulkheads. (5)

iv) Describe in brief any test you are aware of. (5)

Q2. (a) What is bilging and What are the effects of bilging? (8)

(b) How are bulkheads classified? (3)

(c) What are the advantages of water tight bulkheads? How is the water tight bulkhead tested? (5)

Q5. (a) State why cargo ships must have a collision bulkhead. (6)
(b) A bilge holding tank of 5m length. 3m width and 1.8m depth has water of density 1.020 t/m3 upto a sounding of 1.3m and oil of density 0.86 t/m³ is floating on top of water up to an ullage of 0.3m. Calculate the mass of water and oil in the tank. (10)

Q3.a) What are the 3 classes of bulkheads?

b) What are the advantages of water tight bulkheads?

c) How is the water tight bulkhead tested?

d) What is the purpose of providing air pipes to tanks in the vessel?

(4) each