NICHOLLS'S SEAMANSHIP AND NAUTICAL KNOWLEDGE
5. A ship has a transverse metacentric height of I'l foot, and centre of
gravity 12 feet above the keel. 200 tons of water ballast were
taken in, the centre of gravity being 2 feet above the keel. Ship's
displacement 3500 tons. Find the new metacentric height.
6. What is (a) moulded breadth; (b) moulded depth?
Paper 2.
1. Define Lloyd's numerals and give their use.
2. Sketch and describe a system of ventilation to a lower hold.
3. Sketch and describe a balanced freeing port.
4. Of what use are transverse bulkheads ?
5. What precautions would you take when pumping up a ballast tank?
6. A vessel of 4500 tons displacement has a G.M. of 2*4 feet. A weight
of 20 tons is moved 24 feet from amidships to one wing. Find the
angle of heel.
Paper 3.
1. Where is the transom floor and how is it fitted ?
2. Describe fully what is meant by a stiQ ship.
3. Name the different Classification Societies and state how often ships
are opened for survey.
4. Show by sketches bow beams are joined to frames and frames to
floors.
5. How are ballast tanks, bulkheads, and decks tested for water-
tightness ?
6. A box-shaped vessel 600 feet long is floating at a mean draught of
10 feet forward and aft. If I.T.M. is 240 foot-tons, find the new
draught due to shifting 20 tons aft through 48 feet.
Paper 4.
L Sketch and describe how a flat plate keel is fitted to a cellular
double bottom.
2. Describe a margin plate and how fitted.
3. What is meant by the terms "tender" and **stiff "1 Describe
the condition to produce this in a vessel.
4. Define (a) deadweight; (&) tons per inch immerskm.