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Q3. a) Draw a labelled sketch of midship section of a double hull oil tanker. (8)

b) What are Aframax, Suezmax, ULCC and VLCC tankers? (8)

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)

Q4. a) What are the advantages of corrugated bulkheads? (6)

b) Sketch and describe a corrugated transverse watertight bulkhead (10)

Q5.a) What is free surface effect. (6)

b) Explain the methods used to reduce the free surface effect in ship construction and while operating the ship. (10)

Q5. a) Sketch the curve of statistical stability for a ship with positive initial GM and indicate the following clearly: maximum value of GM, angle of heel at which maximum GZ occurs, angle of vanishing stability, Range of positive stability, Initial GM. (10)

b) What is dynamical stability and how can it be ascertained from the curve. (6)

Q6. (a) What is the purpose of conducting inclining experiment on a new vessel? (6)

(b) When a mass of 6 t is moved transversely through a certain distance on a ship of 4300t displacement, the deflection of an 11m pendulum is found to be 120 mm. The transverse meta-centre is 7.25 m above the keel and KG 5.46 m. Find the distance through which 6t was moved. (10)

Q7. a) What is a right-handed and a left-handed propeller? (6)

b) The pitch angle, measured at a distance of 2 m from the centre of the boss, was found to be 21.5° calculate the pitch of the propeller. (10)

Q8. (a) Explain various powers and efficiencies in the Propulsion plant of a ship (6)
(b) A vessel with a displacement of 12250 t burns 290 t of fuel while travelling at a speed of 15 knots on a voyage of 2850 nautical miles. On a voyage of 1800 nautical miles at a speed of 13 knots and a displacement of 14200 t, estimate the quantity of fuel that will be burnt. (10)

Q9. (a) What are the effects of adding mass to draught and trim of a ship?
(b) A ship of 7000 t displacement has a water plane area of 1500 m2. In passing from sea water into river water of 1005 kg/m3 there is an increase in draught of 10 cm. Find the density of the sea water (10)