單項(xiàng)選擇題A ketch is a sailing vessel with（）.

A.one mast
B.two masts: with the mizzen stepped abaft the rudder post
C.two masts: with the mizzen stepped forward of the rudder post
D.two masts: a foremast and a mainmast


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1.單項(xiàng)選擇題A gypsy or gypsyhead is a（）.

A.punt used for painting over the side
B.small，reciprocating steam engine
C.spool-shaped drum fitted on a winch
D.swinging derrick

2.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

3.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

4.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

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

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