單項(xiàng)選擇題A towboat is pushing barges ahead at a dangerously fast speed when（）.

A.the towboat vibrates when backing down
B.the roostertail exceeds the height of the main deck
C.a strain is placed on the face wires
D.water comes over the foredeck of the lead barges


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2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題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

4.單項(xiàng)選擇題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

5.單項(xiàng)選擇題A cargo of refrigerated fruit is packed in crates with transverse members dividing the crate in two equal parts. Which statement is TRUE?（）

A.The cargo block should be tightly packed if the cargo is suitably chilled upon delivery to the vessel
B.Both sides of each crate must be checked for the temperature and the appearance of the fruit
C.The cargo block should be stowed with air channels built throughout the stowed cargo
D.The crates should NEVER be stowed brick fashion