单项选择题

Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.

A.Taglines are wire rope purchases that raise and lower the jib
B.Taglines are wire ropes for horizontal positioning of the rider block
C.Taglines can be fastened to corners of vehicles or containers
D.The crane might not have taglines installed in its rigging system

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单项选择题

Which statement comparing a shipboard crane to conventional gear is TRUE（）.

A.Cranes are more difficult to secure for sea
B.The spotting area of the conventional gear is larger
C.A crane operator requires more training than the winch operator of a yard and stay rig
D.The yard and stay rig is more flexible in its ability to handle a wider variety of cargoes

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Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.

A.Guy
B.Shroud
C.Spider
D.Topping lift

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Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom（）.

A.Cargo whip
B.Gooseneck fitting
C.Spider band
D.Topping lift