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
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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
A.Scrubber
B.Demister
C.Deck water seal
D.Final filter
A.pressure vacuum relief valves
B.excess flow valves
C.safety relief valves
D.flame screens
最新試題
The shut off valve at the gasoline tank which can be operated from outside the tank space （）.
The weight of liquefied petroleum gas vapors as compared to air is（）.
The storage device for nitrogen-pressurized hydraulic fluid，which is used in closing the blowout preventers is called the（）.
Gasoline tanks should be filled（）.
What is used to test a tank for oxygen content?（）
The tops of vents from gasoline tanks should terminate（）.
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 gas is the pressure necessary to keep it in a(n)（）.
Gasoline fumes tend to（）.
LFG tank and pipeline maintenance should include（）.