A.Using a medium graphite grease as a lubricant
B.Operating a winch too slow
C.Using a sheave with an undersized throat
D.A sheave diameter of 24 times the wire's diameter
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A.Detachable
B.Open
C.Pear shaped
D.Stud link
A.Single whip
B.Gun tackle
C.Luff tackle
D.Twofold purchase
A.A line led forward from the bow
B.A line led aft from the bow
C.A line led in the same direction as the keel
D.A line led at a right angle to the keel
A.on only the forward falls
B.on only the after falls
C.with a lead of about 45 degrees to the boat
D.from the falls to the main deck of the vessel
A.Base line
B.Molded line
C.Designer's waterline
D.Keel line
最新試題
The minimum length of a boat painter for a lifeboat in ocean service is（）.
The margin plate is the（）.
You must ensure that lifesaving equipment is（）.
The stevedores have already stowed the porcelain ware（）up to the deckhead.
Solid waste generation，and electricity and water consumption are costly and have their own set of environmental（）.
What danger is presented if a waterspout passes over a ship?（）
The purpose of the tripping line on a sea anchor is to（）.
The main advantage and chief characteristic of a Steulchen boom is that it can be（）.
You are handling a mooring line and are instructed to Check the line.What should you do（）.
When hoisting a boat on gravity type davits using an electric motor driven winch，the davit arms should be brought up（）.