【Daily Question】August 4, 2016: +2 wealth for participation； +3 to +10 wealth for correct answers
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To increase the popularity of the chemical analysis section, a \"One Question per Day\" campaign has been launched to foster an active atmosphere for technical exchanges while offering members certain financial rewards. 【Daily Question】 (Single-choice question) In the determination of the flash point of petroleum products, which method should be used to measure the flash point of light oils? ( ) A. Open-cup method B. Closed-cup method C. Either method is acceptable. Correct answer: B. Reply with your answer in the comments; you will receive +2 wealth points for participating in the quiz. An additional +3 to +8 wealth points will be given if you answer all questions correctly. Extra rewards will also be provided if you offer a thorough analysis and explanation of the questions or answers, including detailed calculation processes. If your answer is correct and your analysis is accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions.
Choose B. . . . Since petroleum products can be in either a closed or an exposed state, there are two methods for measuring their flash point: the closed-cup method and the open-cup method. The closed-cup method is commonly used for light oils, while the open-cup method is often used for lubricants and heavy oils. The specific method of selection depends on the properties of the oil sample and the operating conditions. The closed-cup flash point is used for light oils because it resembles the actual storage and usage conditions of such oils, and can serve as a basis for safety and fire prevention criteria.