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
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Gasoline fumes tend to（）.
What is the proper first aid for LPG in the eye? （）
The weight of liquefied petroleum gas vapors as compared to air is（）.
Storage batteries should be charged in a well ventilated area because（）.
What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.
What is used to test a tank for oxygen content?（）
One of the principal dangers inherent in liquefied petroleum gas is（）.
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（）.
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.
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（）.