單項(xiàng)選擇題A flounder plate，on a topping lift，is（）.

A.a fairlead block
B.a swivel pin for the topping lift block
C.a triangular steel plate with a hole at each corner
D.the lower block of a multiple part topping lift


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1.單項(xiàng)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

2.單項(xiàng)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

3.單項(xiàng)選擇題A deepwell pump is a type of（）.

A.screw pump
B.centrifugal pump
C.eductor
D.gear pump

4.單項(xiàng)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

5.單項(xiàng)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