单项选择题
In observing rig motion while under tow，the period of roll is the time difference between（）.
A.zero inclination to full inclination on one side
B.full inclination on one side to full inclination on the other side
C.full inclination on one side to the next full inclination on the same side
D.zero inclination to the next zero inclination
相关考题
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单项选择题
If the cargo gear on your vessel is equipped with a regular guy and a preventer guy，you should（）.
A.let the schooner guy take most of the strain，thus transferring the load to the opposite boom
B.leave the preventer guy slack
C.secure them as close together as possible on deck
D.secure them so the angle between them is 90°at the boom head -
单项选择题
If reefer spaces are not properly cleaned prior to loading cargo，it will most likely cause（）.
A.mold to develop on commodities
B.malfunction of the refrigeration equipment
C.contamination of the insulation in the space
D.All of the above -
单项选择题
If a cargo of kerosene were considered too lean to explode，then it must be（）.
A.above the explosive range
B.within the explosive range
C.below the explosive range
D.None of the above
