單項(xiàng)選擇題

A vessel is equipped with cross-connected deep tanks. In which situation should the cross-connection valve be closed? （）

A.The tanks lie above the waterline and are filled
B.The tanks are partially filled with dry cargo
C.The tanks are partially filled with liquid cargo
D.The tanks are filled and lie below the waterline

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A sling psychrometer is a(n)（）.

A.type of cargo gear
B.instrument used in celestial navigation
C.instrument used to measure relative humidity
D.instrument used to measure specific gravity

單項(xiàng)選擇題

A high cube container would most likely be used to stow（）.

A.dense bulk cargoes
B.household appliances
C.fragile cargoes
D.heavy industrial machinery