One Question per Day on Refining Knowledge (Technology) 101221

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This post was last edited by “Light as a swallow” on December 21, 2010, at 10:17. Everyone is welcome to actively participate in the learning and discussion of fundamental knowledge related to refining and processing technologies in this forum! In accordance with the forum’s uniform requirements, the maximum score for this activity is 5 Wealth points, and rating charm is prohibited. At the same time, friendship requests and duplicate ratings are declined. Please be cautious when posting; edits will not be valid! Those who have different opinions on the provided answers can post discussions the next day, and those who provide solutions or their own opinions regarding the daily question will receive appropriate rewards! The focus is on participation, and there are prizes for participating! 91 In petroleum, nitrogen-containing compounds increase as the boiling point of the fractions rises. A. Increase B. Decrease C. Remain unchanged D. None of the above. 2. The lower the boiling point of an oil component, the ( ) its flash point. A. High B. Low C. It doesn’t matter D. None of the above. 3. The heavier the components of a petroleum product, the ( ) its autoignition point. A. High B. Low C. It doesn’t matter D. None of the above 4 Vaporization that occurs on the surface of a liquid is called ( ). A. Evaporation B. Boiling C. Vaporization D. Condensation 5. Vaporization that occurs simultaneously at the surface and within the liquid is called ( ). A、Evaporation B、Boiling C、Vaporization D、Liquefaction Answer: ABBAB