A.a not knowing
B.an unknowing
C.an unknown
D.a not known
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A.brake
B.devil's claw
C.pawls
D.All of the above
A.sand
B.soft soil
C.stiff clay
D.heterogeneous soil
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
最新試題
Centrifugal pumps have what advantage(s) over reciprocating pumps?（）.
If a gasoline engine turns over freely but will not start，the cause is generally（）.
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（）.
Anchors are prevented from running out when secured by the（）.
In ship construction，frame spacing is（）.
The purpose of a bilge well is to（）.
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.
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（）.
The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）