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
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最新試題
The most common type of davit found on merchant vessels today is the（）.
All electrical appliances aboard a vessel should be grounded to（）.
The exhaust pipe must be gas tight throughout its entire length otherwise（）.
In ship construction，frame spacing is（）.
Anchors are prevented from running out when secured by the（）.
In ship operations，hoisting and lowering pipe in and out of the drilled hole is the main function of the（）.
As the propeller turns，voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency，pitting of the blades，and vibration. These voids are known as（）.
An example of a modern anchor which has a stock is a(n)（）.
The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）
An example of a messenger is a（）.