單項選擇題

Gasoline tanks should be filled（）.

A.to the top to expel all vapors from the tanks
B.to the top so the operator is certain how much fuel he has aboard
C.with only sufficient fuel for the planned trip so excess gasoline is not carried
D.to near the top with some space allowed for gasoline expansion

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單項選擇題

Gasoline fumes tend to（）.

A.settle near the bottom of the bilge
B.settle near the top of the bilge
C.settle evenly throughout all levels of the bilge by mixing with air
D.disperse to atmosphere

單項選擇題

Each ship having an inert gas system must have a portable instruments to measure concentrations of hydrocarbon vapor in inert atmospheres and also to measure（）.

A.nitrogen
B.oxygen
C.carbon dioxide
D.water vapor

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Gasoline tanks should be filled（）.

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Gasoline fumes tend to（）.

Each ship having an inert gas system must have a portable instruments to measure concentrations of hydrocarbon vapor in inert atmospheres and also to measure（）.