【Daily Question】Hydrogen production and hydrogenation technology version 20190616

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Participation: Prize 1 Wealth； Correct answer: Reward of 3 wealth points ； Note: This post is valid for 48 hours. https://bbs.hcbbs.com/static/image/hrline/2.gif Multiple-choice question: What is the function of the high-level oil tank for the lubricating oil in a pump? A. Ensure normal lubrication pressure for the machine pump. B. Ensure that oil is supplied to the machine pump bearings within a specified time in case of a failure in the lubrication system. C. Maintain the normal operating speed of the machine pump. D. Eliminate the pressure difference across the lubrication filter. Answer: B. Your participation is the greatest support for our work. Giving roses to others leaves a pleasant fragrance in one’s own hands. https://bbs.hcbbs.com/static/image/hrline/1.gif https://bbs.hcbbs.com/static/image/hrline/2.gif Note: The answers will be released automatically after two days.