A.installing rat guards on the mooring lines when in port
B.keeping foods protected and avoiding the accumulation of garbage
C.eliminating possible living spaces for rats when the ship is constructed
D.trapping and/or poisoning the rats
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A.Greenish
B.Bluish
C.Grey
D.Grey-white
A.around the rudder and screws
B.completely around the vessel
C.to leeward of the vessel
D.to windward of the vessel
A.11 seconds
B.15 seconds
C.20 seconds
D.22 seconds
A.gear extending from the side or stern
B.gear that restricts maneuverability
C.less than 50 percent trolling lines
D.None of the above
A.The faying surfaces are coated with white lead (or similar product) before the rivets are set
B.A sealing weld bead of 1/8 or less pitch is run along the plate edge
C.The plate edge is split close to an adjacent plate and mechanically forced into contact with the adjacent plate
D.A properly riveted joint will be watertight; any leakage is stopped by setting up on the rivets
最新試題
Which characteristic is a disadvantage of a controllable- pitch propeller as compared to a fixed-pitch propeller? （）
The forward movement of a ship in one revolution of its propeller is measured by（）.
When the period of beam seas equals the natural rolling period of a vessel，what will most likely occur?（）
Multi-year ice is the hardest sea ice and should be avoided if possible. It is recognizable because of what tone to its surface color? （）
The distance that a ship moves forward with each revolutionof its propeller，if there is no slip，is called（）.
What indicates that a tropical cyclone may be within 500 to 1，000 miles of your position?（）
Which statement is TRUE of a stiff vessel? （）
The main reason a long towline is used during an oceantow is that（）.
Point Judith Harbor of Refuge（）.
The time required to incline from bow down to stern down and return to bow down again is called（）.