A.5% or less
B.10% or less
C.15% or less
D.20% or less
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A.97 times greater
B.94 times greater
C.10 times greater
D.2 times greater
A.over an electrically heated platinum filament
B.where it is mixed with nitrogen
C.where it is ignited by a sparking device
D.where its specific gravity is measured
A.combustible liquid
B.flammable gas
C.flammable liquid
D.flammable solid
A.the gasoline tank is full
B.the bilges，cabins，etc. are thoroughly ventilated
C.you have fresh water on board
D.Each of the above is followed
A.with
B.by
C.of
D.for
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The vapor pressure of a substance（）.
When fueling has been completed（）.
The tops of vents from gasoline tanks should terminate（）.
What normally helps in detecting escaping gas? （）
To determine the pressure and temperature limitations under which LFG is required to be transported on a barge，you should look at the（）.
The amount of LFG that may be loaded into a given tank is determined by（）.
Gasoline fumes tend to（）.
Combustible gas indicators operate by drawing an air sample into the instrument（）.
Where is thicker plating usually found in the construction of integral tanks on a ship? （）
Each inert gas system must be designed to supply the cargo tanks with a gas，or mixture of gasses，that has an oxygen content by volume of（）.