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
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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
A.floors
B.intercostals
C.girders
D.stringers
A.camel
B.dolphin
C.rat guard
D.wedge
A.bottom floor
B.outer bottom
C.shear plating
D.tank top
A.bar securing a cargo port
B.centerline vertical bulkhead
C.deep beam
D.spanner stay
最新試題
The boat is stowed on the davit rather than on a cradle with which type of davit?（）
If the engine of a survival craft does not start，check to see（）.
Anchors are prevented from running out when secured by the（）.
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?（）
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（）.
All electrical appliances aboard a vessel should be grounded to（）.
Cargo pump relief valves are piped to the（）.
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.
The function of the bypass valve on the self-contained breathing apparatus is to（）.