單項選擇題

A cofferdam is（）.

A.any deck below the main deck and above the lowest deck
B.a member that gives fore-and-strength
C.made by placing two bulkhead a few feet apart
D.a heavy fore-and-aft beam under the deck

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單項選擇題

A combustible gas indicator meter is calibrated to read the percentage of（）.

A.vapor to oxygen
B.the flammable limit concentration
C.the autoignition concentration
D.the lower explosive limit concentretion

單項選擇題

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

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

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