单项选择题
A wire rope that has been overstrained will show（）.
A.a bulge in the wire where the strain occurred
B.a decrease in diameter where the strain occurred
C.a kink in the wire where the strain occurred
D.no visible effects of an overstrain
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A tool consisting of a handle and releasable chain used for turning pipe or fittings of a diameter larger than that which a pipe wrench would fit is called（）.
A.breakout wrench
B.makeup tongs
C.chain tongs
D.pipe spinner -
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A sufficient amount of chain must be veered when anchoring a vessel to ensure（）.
A.the vessel has enough room to swing while at anchor
B.the anchor flukes bite into the ocean bottom
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A.mooring line made of spring lay wire rope
B.mooring line running diagonally to the keel
C.mooring line parallel to the keel
D.wire rope used for securing an anchor buoy
