654 NICHOLLS'S SEAMANSHIP AND NAUTICAL KNOWLEDGE
6. Name and sketch the rolled sections used as ship's beams.
6. A vessel of 1600 tons displacement; centre of buoyancy 8 feet above
the keel; centre of gravity 10 feet above the keel; transverse
metacentre 11'5 feet above the keel Find the angle of heel if a
weight of 8 tons is moved 20 feet across the deck.
7. When and by whom are ships surveyed for re-classification $
Paper 4.
1. Describe how a stem bar is connected to a flat plate keel.
2. Sketch a stern frame and name its several parts.
3. What are half beams ? How, and to what are their inner ends
connected.
4. Name the components which contribute longitudinal strength to
the ship.
5. Draw a figure to illustrate a vessel in unstable equilibrium.
6. What effect on a ship's stability has slack water in a double
bottom tank ?
7. What is a stealer I
Paper 5.
1. What is meant by the "centre of pressure" of a rudder and where
about is it situated?
2. How is the thrust of the propeller communicated to the hull ?
3. Sketch and describe the construction of a cellular double bottom*
4. What are the advantages of having longitudinal bulkheads in cargo
spaces ?
5. Define "coefficient of fineness," and find ship's coefficient, having
given, length 400 ft.; breadth 42 ft.; draft 21 ft. in S.W.; dis-
placement tonnage 7640 tons.
6. Does corrosion take place more rapidly on the inside or outside of a
vessel? Give reasons.
7. Explain how a curve of stability is constructed.
Paper 6.
1. Are solid 'floors always fitted at every frame in a cellular double
bottom ship ? If not, what is the alternative arrangement ?
2. How are a web frame and a stringer tuaited at their crossings 1