DieselShip's Online Content Library

Q1. a) What is the purpose of providing air pipes to tanks in the vessel? (5)

b) Sketch an arrangement of air vent head situated on the weather deck. (6)

c) What factors are considered in deciding the bore size of air pipe? (5)

Q1. (a) What is a right-handed and a left-handed propeller? (5)

(b) With the aid of simple sketches explain Rake, Skew and Pitch of the propeller. (6)

(c) What are the advantages and disadvantages of CPP? (5)

Q3. a) What are the various types of tankers for carrying bulk liquids? (6)

b) Sketch a mid-ship section of a double-hulled crude oil tanker. (10)

Q3. Briefly explain the following ship terms used:

(a) LOA (2)

(b) LBP (2)

(c) Breadth Extreme (2)

(d) Breadth Moulded (2)

(e) Depth Extreme (2)

(f) Depth Moulded (2)

(g) Draught Extreme (2)

(h) Draught Moulded (2)

Q5. What do you understand by 'Free surface effect' and how does it affect the ship's stability? (16)

Q6. (a) What is the metric length of one shackle of an anchor chain? (4)

(b) A vessel of 10000 t displacement burns 25 t of fuel per day when her speed is 12 knots. Calculate the probable consumption of fuel over a voyage of 3000 nautical miles at a speed of 11 knots with a displacement of 11000t. (12)

Q7. (a) What are the different types of stern used in ship construction? (6)

(b) A ship consumes 360t of fuel, stores and water when moving from sea water of 1.025 t/m3 into fresh water of 1.000 t/m3 and on arrival it is found that the draught has remained constant. Calculate the displacement in sea water. (10)

Q8. (a) What is a 'mast riser' and what is the purpose of it? (6)

(b) A ship 96 m long is floating at 5m fwd draft and 6.4 m aft draft, MCTC 180 tm, TPC 16. COF is 2 m abaft of midships. Find the location where a weight of 50t should be placed so as to keep the aft draft constant. (10)

Q9. A ship 120 meters long at the waterline has equidistantly spaced half-ordinates commencing from forward as follows 0,3.7,5.9,7.6,7.5,4.6, and 0.1 meters respectively. Find the area of the waterplane using Simpson’s Second rule and the TPC at this draft, Water density is 1.025 t/m3. (16)

Q1. 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)

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. A virtual rise in the centre of gravity of a ship may be caused by ________(16)

(a) Filling a partially filled tank

(b) Using an onboard crane to lift a freely swinging heavy object

(c) Emptying a partially filled tank

(d) Transferring pipe from the setback area to the pipe rack

Briefly Justify your Answer.

Q4. 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)

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)

Q6. (a) What happens if a neutral equilibrium ship is pushed or acted upon by external forces like a beam wind or wave? Explain with a diagram. (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 are the SOLAS regulations regarding the location of the collision bulkhead? (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 5m long. The bottom of the barge is lined with teak (rd 0.805) 120mm 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 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.