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 （）.
What normally helps in detecting escaping gas? （）
The vapor pressure of a substance（）.
Combustible gas indicators operate by drawing an air sample into the instrument（）.
Compared to the amount of concentrated foam liquid used，the amount of low expansion mechanical foam produced is（）.
One of the principal dangers inherent in liquefied petroleum gas is（）.
Name one major advantage of transporting gas under refrigeration.（）
What is the proper first aid for LPG in the eye? （）
The weight of liquefied petroleum gas vapors as compared to air is（）.
What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.