EXAMINATION PAPERS	671
Paper 6.
 1.	How is a cargo of rice ventilated ?
 2.	Describe the permanent and portable dunnage usually fitted in ships.
 3.	Describe  the usual arrangement of derricks and winches in  an
ordinary cargo ship.
4.	Where should the following goods be stowed, and why:—Acids,
explosives, oil in barrels, tallow?
5.	Sketch   an   ordinary   floor, describe it and name the parts to
which it is attached.
 6.	What are " breasthooks " 1    Where are they placed, and why ?
 7.	A hold of capacity 42,000 cubic feet has in it 150 tons of iron,
stowed at 12 cubic feet per ton. How many bales of esparto grass
can be stowed in the hold at 100 cubic feet to the ton and allowing
6 bales to the ton ?
8.	Define " centre of gravity " and state how it would be found in (a)
a square plate; (b) a circular plate, omitting the thickness of the
plate.
9.	Explain why a piece of steel sinks when thrown into the water, and
why a steel ship does not sink.
Paper 7.
 1.	Sketch a barrel and name its parts, including hoops.
 2.	How would you separate (a) parcels of timber; (6) parcels of rod iron?
 3.	How would you stow boxes of green fruit?   Describe the arrange-
ments made for ventilation.
4.	How is a cargo of frozen meat ventilated?   "^hat precautions are
taken when loading?
5.	A ship's hold capacity is 34,440 cubic ft.   745 tons of coal are stowed
in it at 42 cub. ft. per ton. 225 tons of rails are then put in to
fill the hold. Find the stowage capacity of the rails.
6.	Describe a watertight bulkhead and how it is connected to the
adjacent parts.
7.	What was the length of your last ship?   How many bulkheads had
she and tow many of these were watertight?
8.	A homogeneous log of rectangular shape   measures   12'x2'X*T,
It floats in F.W. at a depth of 9 inches, what is its weight?	f