A.bottom floor
B.outer bottom
C.shear plating
D.tank top
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A.bar securing a cargo port
B.centerline vertical bulkhead
C.deep beam
D.spanner stay
A.increase the lifting capacity
B.increase the lifting radius
C.protect the slings
D.protect the upper part of a load
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
A.blind flange
B.pivot coupling
C.quick-release coupling
D.spectacle flange
A.yearly inspection
B.quarterly inspection
C.monthly inspection
D.weekly inspection
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In ship construction，keel scantlings should be the greatest（）.
The function of the bypass valve on the self-contained breathing apparatus is to（）.
The portable radio apparatus means（）.
In relation to cargo gear，what does SWL mean?（）.
The series of valves used to control the return flow in well control operations is called the（）.
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.
The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.
In ship operations，hoisting and lowering pipe in and out of the drilled hole is the main function of the（）.
All electrical appliances aboard a vessel should be grounded to（）.
The holding capability of an anchor is primarily determined by the（）.