单项选择题

What should you do to a line to prevent fraying where it passes over the side of the vessel（）.

A.Worm that part of the line
B.Splice that part of the line
C.Cover it with chafing gear
D.Install a cleat

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单项选择题

What material may be substituted for zinc when making a poured metal socket ending to a wire rope（）.

A.Lead
B.Babbitt
C.Solder
D.Nothing

单项选择题

What is the main purpose of dunnage（）.

A.To act as ballast for light vessels
B.To provide ventilation and drainage for cargo
C.To secure the tarpaulins in place
D.To support weakened bulkheads