674: NICHOLLS'S SEAMANSHIP AND NAUTICAL KNOWLEDGE
6. A ship's starboard double bottom tank was filled up, how would
this affect her centre of gravity?
7. A block of marble weighing 1 ton falls into the dock while dis-
charging; would the strain on the cargo gear when lifting it to the
surface of the water be greater or less than when lifting it out of
the hold? Give reasons.
8. If a vessel displaces 100 tons in salt water what weight will she
displace in F.W.?
9. Displacement tons 376 736 1352 2050 3140 4450
Draught in feet 2' 4' 1' 10' 14' 18'
At draught 8' 8" she loaded 750 tons and discharged 100 tons, find
new draught. When she had discharged 2973 tons cargo and taken
in 725 tons water her draught was 9 ft. Find her original draught.
Paper 11.
1. When discharging a bag cargo you find some bags empty and some
torn, what action would you take?
2. How would you prepare a hold for, and stow, a cargo of frozen
meat?
3. In what direction does heated air travel in a confined space? And
of what benefit is this knowledge to a ship's officer?
4 Hold capacity 41,500 cub. ft., 14,500 bags of cement, weighing 112 Ibs,
per bag, are stowed at the bottom, the rest of the hold is filled with
403 measurement tons of 40 cub. ft. Find how many cub. ft. per
ton the cement STOWS at.
5. How are dirt and mud prevented from entering the pipes used to
pump out bilges and ballast tanks?
6. Describe a hatch coaming and how it is strengthened, and what parts
of the structure are connected to it.
7. Describe and name the parts of a complete transverse member of
an ordinary cargo steamer having cellular double bottom,
8. What is displacement? If the total volume of the immersed part
of a vessel is 85,750 cub. ft., what is the equivalent in tons when
the vessel floats in salt water?
9. Mean draughts 3 ft. 6 ft. 9 ft. 12 ft. 14 ft.
T.P.L 10-7 14-7 16-8 18-0 * 18*5
Find T.P.L at 5, 7 and 13 ft* If the mean draught is 7 ft. and the
vessel discharges 45 tons, find her new draught