单项选择题
The safe working load for the assembled cargo gear and the minimum angle to the horizontal for which the gear is designed shall be marked on the（）.
A.deck
B.head of the boom
C.heel of the boom
D.mast or king post
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The pneumatic containers which store bulk dry mud additives and cement on a ship are called（）.
A.mud hoppers
B.bulk bins
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D.mud tanks -
单项选择题
The greatest strain，when lifting a load with the jumbo purchase，is on（）.
A.all of the parts，dividing the load equally
B.the hauling part because it must absorb the frictional losses of all the sheaves
C.the parts in the movable block
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The（）should ensure that the holds in which chemical packages are stowed are properly supervised during the loading operations and these packages are regularly inspected for leakage or damage on the voyage.
A.berth operator
B.harbour supervisor
C.master of a ship
D.port authority
