182 NICHOLLS'S SEAMANSHIP AND NAUTICAL KNOWLEDGE
47. How often is the fire-extinguishing apparatus inspected?
48 Assuming the emergency signal to have been made on the steam
whistle at sea, "all hands and passengers muster at stations,"
state what particular duties should be performed by the mem-
bers of (a) the deck department, (6) the engine department, (c) the
cabin department
49. A steamer burns 24 tons of fuel per day when steaming 8 knots,
find the approximate consumption if speed is increased to 9 knots
and again to 10 knots.
Ans,—34 tons; 47 tons.
50. The consumption at 12 knots being 40 tons per day, find what
tfte approximate consumption will be if speed is reduced to 10 knots.
Ans.—23-1 tons.
51. A steamer has accomplished 1200 miles at 10 knots with a
consumption of 140 tons of fuel, she has still 1400 miles to go with only
100 tons left. Required the reduced speed to reach destination.
Ans.—7-8 knots.
52. A vessel has steamed 1500 miles at 10 knots burning 40 tons of
coal daily, find her consumption to do 12 knots if she had 1200 miles to
complete the passage.
Ans.—288 tons or about 69 tons per day.
53. Name the three corrections to be applied to barometer readings
to reduce them to standard, and state why they are necessary.
54. What is the error of capacity and why is it not necessary to
apply it to marine barometers ?
55. Describe hydraulic water-tight doors as usually fitted in large
passenger steamers.
56. What conditions must an approved steering gear fulfil ?
57. State the more important of the General Standing Orders adopted
in all well conducted ships (a) at sea, (&) at anchor, (c) in dobk.