A.increase the lifting capacity
B.increase the lifting radius
C.protect the slings
D.protect the upper part of a load
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A.keeps sparks from falling into an open tank
B.secures covers on ullage openings
C.prevents sparks from getting out of an engine's exhaust system
D.grounds static electricity
A.blind flange
B.pivot coupling
C.quick-release coupling
D.spectacle flange
A.yearly inspection
B.quarterly inspection
C.monthly inspection
D.weekly inspection
A.keep a line from fraying
B.join lines of unequal size
C.stop off a line
D.shorten a line
A.positive correction
B.dip error
C.negative correction
D.semidiameter error
最新試題
The boat is stowed on the davit rather than on a cradle with which type of davit?（）
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.
If a gasoline engine turns over freely but will not start，the cause is generally（）.
An example of a modern anchor which has a stock is a(n)（）.
In ship construction，keel scantlings should be the greatest（）.
In nautical terminology a dog is a（）.
Anchors are prevented from running out when secured by the（）.
The portable radio apparatus means（）.
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（）.
An LWT anchor often has difficulty tripping in（）.