【Daily Question】Jan 7, 2016: Participation +2 Wealth； +3 to 8 wealth for correct answers

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This post was last edited by zjp on 16:44, January 9, 2016. To increase the popularity of the chemical analysis section, a \"One Question per Day\" campaign has been launched; this aims to foster active technical exchanges while also providing financial rewards to users. 【Daily Question】 (Single-choice question) Which of the following options is correct regarding the operation of high-pressure gas cylinders? （ ） A. The air valve will not open; try hitting it with an iron object. B. Using an air cylinder whose inspection deadline has passed. C. When the valve freezes in winter, heat it up with fire. D. Regularly check the air cylinder, pressure gauge, and safety valve. Correct answer: D. Post your answer in the replies to participate; you will receive +2 wealth points for that. If you get all answers correct, you’ll get an additional +3 to +8 wealth points. Those who provide thorough analyses and explanations for the questions (or include detailed calculation processes) will receive extra wealth points as a reward. 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. Note: We will close this post after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation.