单项选择题
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
In securing a towing cable，consideration must be given ...
单项选择题In securing a towing cable，consideration must be given to letting go in an emergency. The possible whip of towlines when released can be overcome by（）.
A.increasing the shaft RPM prior to release B.using a pelican hook for quick release C.using preventers D.using a short chain for the lead through the stern chock
