单项选择题
A.Gun tackle B.Luff tackle C.Two-fold tackle D.Double-luff tackle
Manila slings should not be used to load（）.A.cottonB.lu...
单项选择题Manila slings should not be used to load（）.
A.cotton B.lumber C.steel D.tires
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
Limit switches on gravity davits should be tested by（）....
单项选择题Limit switches on gravity davits should be tested by（）.
A.the engineers，from a panel in the engine room B.shutting off the current to the winch C.pushing the switch lever arm while the winch is running D.All of the above
