【Daily Question】Hydrogen production and hydrogenation technology version 20190528
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This post was last edited by Green Lotus on 2019-5-29 at 12:46. Participants: 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: Which of the following seals are all contact-type seals? ( ) A. Packing seal and ordinary mechanical seal B. Labyrinth seal and gasket seal C. Floating ring seal and mechanical seal D. Floating ring seal and dry gas seal Answer: A 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 published automatically after two days.
Single-choice question: Which of the following seals belong to contact seals? ( ) B. Labyrinth seal and gasket seal