DieselShip's Online Content Library

Q1. (a) Explain what is meant by longitudinal framing and transverse framing? (8)

(b) Which types of ships would have these methods of construction? Give reasons (8)

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.

Q4. (a) Sketch a semi balanced rudder of your choice showing: (10)

(i) A detail of the hinges or pintels about which rudder turns.

(ii) Details of the rudder carrier bearing, which supports the weight of the rudderstock and rudder.

(b) State advantages of semi balanced rudder over an unbalanced rudder. (6)

Q1.a) Describe the following and explain their function (8)

i) Hawse pipe

ii) Spurling pipe

iii) Cable stopper

b) With the aid of a sketch of a ship bow show the arrangement of anchor cable from anchor to chain locker. (8)

Q6. (a) Define Centre of Flotation. What happens to the draught and trim of a ship if a small mass is added to the ship at the Centre of Flotation? (6)

(b) A ship of displacement 10010 tonnes has KM 6.7m and GM 0.76m. A mass of 10 tonnes having KG 7.6m is shifted transversely. The deflection of a pendulum of length 7.6m is 0.125m. Find the distance through which the mass is shifted. Also find the position of the new centre of gravity above the keel due to the removal of the same mass. (10)

Q7. (a) What is meant by statical stability? What are the factors that influence stability? (6)

(b) A box barge 25 m long and 4 m wide floats in fresh water at a draught of 1.2 m and has an empty mid length compartment 5 m long. The bottom of the barge is lined with teak (rd 0.805) 120 mm thick. After grounding all the teak is torn off and the centre compartment laid open to the sea. Calculate the final draught. (10)

Q8. The ½ ordinates of a waterplane 120 m long are as follows:

Section AP ½  1  1½  2  3  4  5  6  7  8  8½  9  9½  FP

½ord 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  0 m

Calculate:

a) waterplane area

b) distance of centroid from midships. (16)

Q6. 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:

a) the tank is just completely full

b) there is a head of 7m of water above the tank top. (16)