Q5. A uniformly constructed box shaped vessel of length 60 m and breadth 10 m has an even keel draught of 2 m when floating in the light condition in sea water of density 1025 kg/m³.
The vessel has five holds of equal length and is to be loaded with 4000 tonne of cargo, with equal quantities in each of the centre and end holds, and the balance equally distributed in No.2 and No.4 holds.
The cargo in all holds will be trimmed level.
Calculate EACH of the following:
(a) the maximum amount to be loaded in the centre and end holds in order that a maximum hogging bending moment amidships of 3000 tm will not be exceeded; (10)
(b) the resulting shear force at EACH of the bulkheads. (6)
Q7. A ship consumes an average of 60 tonne of fuel per day on main engines at a speed of 16 knots. The fuel consumption for auxiliary purposes is 8 tonne per day.
When 1000 nautical miles from port it is found that only 160 tonne of fuel remains on board and this will be insufficient to reach port at the normal speed.
Determine the speed at which the ship should travel to complete the voyage with 20 tonne of fuel remaining. (16)
Note: A graphical solution is recommended.
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