A.blind flange
B.pivot coupling
C.quick-release coupling
D.spectacle flange
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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
A.Restricted area
B.Closed area
C.Prohibited place
D.Forbidden place
A.beats
B.beasts
C.bacons
D.battens
最新試題
The portable radio apparatus means（）.
In relation to cargo gear，what does SWL mean?（）.
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（）.
In ship construction，keel scantlings should be the greatest（）.
An example of a modern anchor which has a stock is a(n)（）.
The exhaust pipe must be gas tight throughout its entire length otherwise（）.
The function of the bypass valve on the self-contained breathing apparatus is to（）.
In ship operations，hoisting and lowering pipe in and out of the drilled hole is the main function of the（）.
Permission is kindly requested（）the ballast water.
The extension of the after part of the keel in a single-screw vessel upon which the stern post rests is called the（）.