The free surface effects of a partially full liquid tank decrease with increased ______．
A. Density of the liquid
B. Placement of the tank above the keel
C. Displacement volume of the ship
D. Size of the surface area in the tank
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Since lubricating oils and jet fuels are acutely water critical，it is necessary to effect
A. purging with hydrocarbon gas
B. gas-freeing operations
C. maintaining an inert condition
D. full line draining and mopping up of any water
Sulfuric acid is a ______．
A. Clear syrupy liquid with no odor
B. Colorless-to-brown liquid with a choking odor when hot
Colorless liquid with a pleasant fruity odor
D. Whitish liquid with a faint，pleasant odor
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