A.odor
B.color
C.pressure
D.density
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A.mimimum oxygen content line
B.critical displacement line
C.critical dilution line
D.upper threshold limit
最新試題
When fighting fires in spaces containing bottles of LPG (liquefied petroleum gas)，you should （）.
Butadiene，inhibited，is labeled as a（）.
Name one major advantage of transporting gas under refrigeration.（）
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.
Combustible gas indicators operate by drawing an air sample into the instrument（）.
Gasoline vapor tends to collect（）.
The primary hazard of liquefied petroleum gas and liquefied natural gas is（）.
What is used to test a tank for oxygen content?（）
One of the principal dangers inherent in liquefied petroleum gas is（）.