单项选择题

A.camelB.dolphinC.rat guardD.wedgeA wooden float placed……

A wooden float placed between a ship and a dock to prevent damage to both is called a（）.

A.camel
B.dolphin
C.rat guard
D.wedge

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热门试题

单项选择题A term applied to the bottom shell plating in a double-bottom ship is（）.

A.bottom floor
B.outer bottom
C.shear plating
D.tank top

单项选择题A strong back refers to a（）.

A.bar securing a cargo port
B.centerline vertical bulkhead
C.deep beam
D.spanner stay

单项选择题A spreader bar is used to（）.

A.increase the lifting capacity
B.increase the lifting radius
C.protect the slings
D.protect the upper part of a load

单项选择题A spark arrestor（）.

A.keeps sparks from falling into an open tank
B.secures covers on ullage openings
C.prevents sparks from getting out of an engine's exhaust system
D.grounds static electricity

单项选择题A single fitting installed in a pipeline that either blanks off the pipe or allows a full flow passage of a liquid through the pipe is referred to as a（）.

A.blind flange
B.pivot coupling
C.quick-release coupling
D.spectacle flange