Q2. What are the main functions of:
(a) Fore peak (4)
(b) After peak (4)
(c) Deep tank (4)
(d) Double bottom (4)
Give examples of liquid carried in these tanks.
Q3. With regards to the metacentric height, which of the following statements is true? (16)
(a) It is used to indicate the quality of initial stability.
(b) It is located below the center of buoyancy.
(c) It is measured vertically above the center of buoyancy.
(d) Its determination is the objective of the inclining experiment. Briefly justify your answer.
Q5. Define centre of buoyancy and show with the aid of sketches how a vessel which is stable will return to the upright after being heeled by an external force. (16)
Q8. The 1/2 ordinates of a waterplane 120 m long are as follows: (16)
Section AP 1/2 | 1 | 1½ | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 8½ | 9 | 9½ | FP
½ ord 1.2 | 3.5 | 5.3 | 6.8 | 8.0 | 8.3 | 8.5 | 8.5 | 8.5 | 8.4 | 8.2 | 7.9 | 6.2 |3.5 |0m
Calculate: (16)
(a) Waterplane area
(b) Distance of centroid from midships.
Q9. A ballast tank is 15 m long, 12 m wide and 1.4 m deep and is filled with fresh water. Calculate the load on the top and short side, if: (16)
(a) The tank is just completely full
(b) There is a head of 7m of water above the tank top.
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