單項(xiàng)選擇題A spreader bar is used to().

A.increase the lifting capacity
B.increase the lifting radius
C.protect the slings
D.protect the upper part of a load


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1.單項(xiàng)選擇題A strong back refers to a().

A.bar securing a cargo port
B.centerline vertical bulkhead
C.deep beam
D.spanner stay

2.單項(xiàng)選擇題A tank which is not completely full or empty is called().

A.pressed
B.slack
C.inertial
D.elemental

3.單項(xiàng)選擇題A venetian vent or rice ventilator is used in stowage of which cargo?().

A.Bagged cargo
B.Bulk grain
C.Bulk rice
D.Refrigerated goods

4.單項(xiàng)選擇題A vertical shife of weight to a position above the vessel''s center of gravity will().

A.increase reserve buoyancy
B.decrease the righting moment
C.decrease KG
D.increase KM

5.單項(xiàng)選擇題A vessel aground may have negative GM since the().

A.decrease in KM is equal to the loss of draft
B.virtual rise of G is directly proportional to the remaining draft
C.lost buoyancy method is used to calculate KM, and KB is reduced
D.displa ement lost acts at the point where the ship is aground