單項選擇題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


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1.單項選擇題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

2.單項選擇題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

3.單項選擇題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

4.單項選擇題Generally speaking,the heavier cargo will go into the(),distributing it evenly fore and aft,the lighter cargo will probably be placed in the().

A.deep tanks/lower holds
B.lower holds/tweendecks
C.tweendecks/deep tanks
D.deep tanks/tweendecks

5.單項選擇題Cargo that is suitable for carriage on Ro-Ro vessels includes().

A.trailers
B.rolling vehicles
C.containers
D.All of the above