单项选择题
A.Wire B.Dacron C.Nylon D.Polypropylene
What should you do to a line to prevent fraying where i...
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
What material may be substituted for zinc when making a...
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
What is the main purpose of dunnage（）.A.To act as balla...
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
