A.lift
B.rise
C.elevate
D.hoist
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A.Radial
B.Sheath-screw
C.Quadrantal
D.Gravity
A.Centrifugal
B.Gear
C.Piston
D.Vane
A.A flashing light combined with a fixed light of greater brightness
B.Light flashes combined in groups，with a different number of flashes in each group
C.A light showing groups of two or more flashes at regular intervals
D.A fixed light varied at regular intervals by groups of two or more flashes of greater brightness
A.auxiliary guys
B.extra fair leads
C.steel bands
D.stops
A.be open to view so，if a foreign object gets in the gearing，the operator can immediately stop the machinery
B.have a guard over the gearing
C.be painted a contrasting color from the base color in order to call attention to the gearing
D.not be operated if there is any crew within 10 feet of the machinery
最新試題
Solid waste generation，and electricity and water consumption are costly and have their own set of environmental（）.
The tweendecker has（）below the main deck.
Which will cause a wire rope to fail（）.
The lifeboats on your vessel are stowed on cradles on deck and are handled by sheath-screw boom davits. Which of the following statements about launching a boat is TRUE?（）
What term indicates the line drawn at the top of the flat plate keel（）.
You must ensure that lifesaving equipment is（）.
You are operating a lift boat.When beginning to jack down you should（）.
When lowering lifeboats in heavy seas，a good practice is to rig frapping lines（）.
The usual method of arranging a line on deck so that it will run out easily without kinking or fouling is（）.
The margin plate is the（）.