A.mimimum oxygen content line
B.critical displacement line
C.critical dilution line
D.upper threshold limit
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A.controls the amount of gasoline to the engine
B.shuts off the gasoline supply at the tank
C.is used if the gasoline tank leaks
D.All of the above
A.On the outside of the tank
B.At the bottom of the tank
C.At the top of the tank
D.At the center of the tank
A.exclusion of all sand and solid matter
B.cleaning with clean fresh or sea water
C.examination for fractures and pitting
D.All of the above
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
A.In open air
B.Inside cabins near the overhead
C.In the machinery space near the engine air intake
D.Underwater
A.5% or less
B.10% or less
C.15% or less
D.20% or less
A.above the floor plates of the bilges
B.above the carburetor level
C.at the lowest point of the bilge areas
D.at no particular level
A.decreases as temperature increases
B.increases with the temperature
C.is not affected by temperature
D.may increase or decrease as the temperature rises
A.the fuel tank fill pipe should be left open to allow vapors to vent from the tank
B.the engine should be started immediately to prevent vapor lock in the fuel line
C.all hatches should be opened and all compartments should be ventilated
D.open the fuel line and drain a small amount of gasoline into the bilge to clear the line of sediment
A.Bends in the piping
B.Slowing the pumping rate
C.Pipeline valves
D.Backing rings for pipe welds
最新試題
LFG tank and pipeline maintenance should include（）.
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（）.
The airborne concentrations of substances (such as H2S) under which nearly all workers may be repeatedly exposed without adverse effects are called（）.
The storage device for nitrogen-pressurized hydraulic fluid，which is used in closing the blowout preventers is called the（）.
The amount of LFG that may be loaded into a given tank is determined by（）.
If you have a liquefied flammable gas barge in tow，which is NOT required of you with respect to the barge and its cargo? （）
To determine the pressure and temperature limitations under which LFG is required to be transported on a barge，you should look at the（）.
Butadiene，inhibited，is labeled as a（）.
It should be noted（）the use of synthetic mooring ropes able to produce sparks by their manipulation is absolutely forbidden on board petroleum tankers and LPG or LNG carriers，or any vessels carrying inflammable substances.
The vapor pressure of a substance（）.