DieselShip's Online Content Library

Q1.a) Sketch a transverse section through a duct keel labelling its component parts. Indicate the duct keels position in the ship structure. (8)

b) Explain why duct keels are fitted. (8)

Q2.a) Write short notes on panting, pounding and Raking (8)

b) Explain with the aid of simple sketches hogging and sagging of a vessel (8)

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

Q4.a) What is the fundamental purpose of a ‘Load line’ marking on ships? (5)

b) Sketch and describe the features of a ‘Load line’ marking. (6)

c) Name five conditions that must be met before freeboard is assigned to a ship. (5)

Q5.a) Name the different type of rudders. (6)

b) Draw a labelled sketch of an unbalanced rudder fitted onto a rudder post (10)

Q6.a) Sketch and describe the midship section of a bulk carrier, labelling the structural members. (6)

b) A vessel 40 m long has a constant cross-section in the form of a trapezoid 10 m wide at the top, 6 m wide at the bottom and 5 m deep. It floats in sea water at a draught of 4 m. Calculate its displacement. (10)

Q7. Briefly explain the following ship terms commonly used

a) Gross Tonnage

b) Deadweight

c) Displacement

d) Strakes

e) Deck Beams

f) Girders (20)

Q8. (a) Derive the formula for Admiralty Coefficient. (6)

(b) A ship travels 900 nautical miles at a speed of 12.5 knots and burns 150t of fuel over the voyage. Estimate the distance the ship could travel at a speed of 13.5 knots on 250t of fuel. (10)

Q9. A hopper barge of box form 50 m long and 10 m wide floats at a draught of 2 m in seawater when the hopper, which is 15 m long and 5 m wide, is loaded with mud having relative density twice that of the seawater, to the level of the waterline. Doors in the bottom of the hopper are now opened allowing the mud to be discharged. Calculate the new draught. (16)