A.sand
B.soft soil
C.stiff clay
D.heterogeneous soil
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A.shear ram
B.blind ram
C.pipe ram
D.annular ram
A.articulated anchor
B.Flipper Delta anchor
C.Baldt anchor
D.Danforth anchor
A.fairlead
B.heaving line
C.stay
D.warp
A.prevent them from falling when the vessel rolls
B.protect personnel from electrical shock
C.increase their operating efficiency
D.prevent unauthorized personnel from operating them
A.actual depth of water
B.actual depth of water below keel
C.average depth from waterline to hard bottom
D.average depth of water to soft bottom
最新試題
In ship construction，keel scantlings should be the greatest（）.
The purpose of a bilge well is to（）.
The function of the bypass valve on the self-contained breathing apparatus is to（）.
In ship operations，hoisting and lowering pipe in and out of the drilled hole is the main function of the（）.
The series of valves used to control the return flow in well control operations is called the（）.
An example of a messenger is a（）.
If a gasoline engine turns over freely but will not start，the cause is generally（）.
The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.
Centrifugal pumps have what advantage(s) over reciprocating pumps?（）.
All electrical appliances aboard a vessel should be grounded to（）.