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
The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.
An LWT anchor often has difficulty tripping in（）.
The portable radio apparatus means（）.
The series of valves used to control the return flow in well control operations is called the（）.
Centrifugal pumps have what advantage(s) over reciprocating pumps?（）.
Permission is kindly requested（）the ballast water.
An integral part of a blowout preventer that serves as the closing element on an open hole，and whose ends do not fit around the drill pipe but seal against each other and shut off the space below completely is the（）.
All electrical appliances aboard a vessel should be grounded to（）.
The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）
In relation to cargo gear，what does SWL mean?（）.