單項選擇題A face line is used to（）.
A.prevent barge movement in a lock
B.secure two barges end-to-end
C.secure barges to the towboat
D.secure barges side-by-side
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1.單項選擇題A drift lead indicates that the vessel is dragging anchor when the line is（）.
A.taut and leading forward
B.slack
C.leading out perpendicular to the centerline
D.leading under the hull
2.單項選擇題A deepwell pump is a type of（）.
A.screw pump
B.centrifugal pump
C.eductor
D.gear pump
3.單項選擇題A bowline is used to（）.
A.join lines of equal size
B.form a temporary eye (loop) at the end of a line
C.be a stopper
D.keep a line from fraying
4.單項選擇題A block that can be opened at the hook or shackle end to receive a bight of the line is a（）.
A.bight block
B.gin block
C.heel block
D.snatch block
5.單項選擇題You can safely step in the bight of a line（）.
A.when it is not under strain
B.if both ends are made fast
C.in an emergency
D.at no time