单项选择题
A.using a rotary grinder with an installed shield B.letting go the anchor C.handling wire rope or natural fiber line D.painting with a spray gun
Manila lines in which the strands are right-hand laid（）...
单项选择题Manila lines in which the strands are right-hand laid（）.
A.should be coiled in a clockwise direction B.should be coiled in a counterclockwise direction C.may be coiled either clockwise or counterclockwise D.should never be coiled
In the manufacture of wire rope，if the wires are shaped...
单项选择题In the manufacture of wire rope，if the wires are shaped to conform to the curvature of the finished rope before they are laid up，the rope is called（）.
A.composite B.left-lay C.improved D.preformed
In a twin screw ship going half-ahead，both screws turni...
单项选择题In a twin screw ship going half-ahead，both screws turning outboard and the rudder amidships，no current or wind，the vessel will（）.
A.Move bodily to port B.Move bodily to starboard C.Move in a zig-zag motion D.Steer a fairly straight course
