單項(xiàng)選擇題The type of carrier required to file a copy of freight tariffs would be the().

A.common carrier
B.tramp
C.public vessel
D.bulk carrier


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2.單項(xiàng)選擇題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

3.單項(xiàng)選擇題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

5.單項(xiàng)選擇題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