单项选择题

A tow of 9 barges is made up three abreast and three long. The towboat is faced up to the center string which is known as the（）.

A.main string
B.push string
C.power string
D.face string

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单项选择题

A spreader bar is used to（）.

A.increase the lifting capacity
B.increase the lifting radius
C.protect the slings
D.protect the upper part of a load

单项选择题

A situation has occurred in which your vessel must be towed. When the towing vessel passes the towing line to you，you should secure the line（）.

A.to the base of the foremast
B.to the forward-most bitts
C.to the forward part of the deckhouse
D.at the stern

单项选择题

A loaded hopper barge with independent tanks has a placard，with alternating red and white quadrants，on each side and end. Which statement concerning this barge is TRUE?（）

A.The cargo will spontaneously ignite if released to the atmosphere
B.You must operate this barge as a lead barge
C.The barge should be spotted as far away from the towboat as possible
D.The barge must be in a protected position within the tow