单项选择题

The pneumatic containers which store bulk dry mud additives and cement on a ship are called（）.

A.mud hoppers
B.bulk bins
C.P-tanks
D.mud tanks

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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
D.the standing part because it is directly connected to the weight

单项选择题

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

单项选择题

Sea water temporarily pumped into tanks to simulate the increased vertical loading of environmental forces is termed（）.

A.preload
B.liquid variable load
C.fixed load
D.basic load