单项选择题
A wildcat is a（）.
A.deeply-grooved drum on the windlass with sprockets which engage the links of the anchor chain
B.winch that is running out of control due to a failure of the overspeed trips
C.line that has jumped off the gypsyhead while under strain
D.nylon line that parts under strain and whips back in a hazardous manner
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A single fitting installed in a pipeline that either blanks off the pipe or allows a full flow passage of a liquid through the pipe is referred to as a（）.
A.blind flange
B.pivot coupling
C.quick-release coupling
D.spectacle flange -
单项选择题
A set of interior steps on a ship leading up to a deck from below is known as（）.
A.a companion way
B.tween-decks
C.stairs
D.Any of the above are acceptable -
单项选择题
A measurement device for inspecting anchor chain is the（）.
A.slide rule
B.go-no-go gauge
C.derrick tape
D.amp probe
