690 KICHOLLS'S SEAMANSHIP AND NAUTICAL KNOWLEDGE
3< Describe how wooden decks are fitted when there are no steel decks.
4. Describe an oxy-acetylene blow-lamp and its uses.
5. Describe and sketch a cellular double bottom with solid floors at
alternate frames.
6. A vessel of 1700 tons displacement having her centre of gravity 17
feet above the keel takes the following cargo on board:—
3600 tons wheat, C.G. 16 ft. above keel.
1000 tons barley C.G. 20
100 tons oats C.G. 10
What is the height of her centre of gravity when loaded.
Paper 8.
1. What is "synchronism"? How and why should it be avoided?
2. What is the difference between a cellular double bottom and a
Mclntyre tank?
3. What is meant by length between perpendiculars, moulded breadth,
moulded depth?
4. Sketch a stern frame and show how it is connected to the hull of the
vessel.
5. (a) What are metacentric curves? (&) Define "metacentric stability.'*
6. At the commencement of a voyage a vessel has a displacement of
4500 tons and a K.G. of 11 feet. Initial metacentric height 1 foot.
During the voyage she consumes 150 tons of bunkers from No. 3
hold with a K.G. of 14 feet and 150 tons of water are run into No. 4
tank with a K.G, of 2 feet. Find the metacentric height on
arrival.
Paper 9*
1. How is a mast stepped (a) with a single deck; (&) with two decks?
2. How are the following tested for watertightness;—(a) ballast
tanks; (6) collision bulkheads; (o) decks?
3. Sketch a midship section of a cargo steamer. State the type of
vessel selected, and the system she is built on. Give length,
breadth, depth, also spacing of frames.
i. What is statical stability? What information could you derive from
a curve of stability?
5. Describe how a stern tube is connected in a single soiew steamer,
and illustrate by means of sketches.