A.brake
B.devil's claw
C.pawls
D.All of the above
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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
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
最新試題
The exhaust pipe must be gas tight throughout its entire length otherwise（）.
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（）.
The function of the bypass valve on the self-contained breathing apparatus is to（）.
The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）
In ship construction，frame spacing is（）.
If the engine of a survival craft does not start，check to see（）.
An LWT anchor often has difficulty tripping in（）.
In nautical terminology a dog is a（）.
Permission is kindly requested（）the ballast water.
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.