One Question per Day on Synthetic Ammonia (Series 6)

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This post was last edited by 654262293 on 2016-2-10 18:27. I. Multiple-choice questions (each question has 4 options, of which only 1 is correct; fill in the correct option in the brackets). Continuing from Series 5, 26. The three elements of threads are ( ). (A) Tooth profile, outer diameter, pitch (B) Tooth profile, length, pitch (C) Tooth profile, length, pitch (D) Outer diameter, length, material 27. Chemical equipment drawings include ( ). (A) Equipment diagram (B) Component diagram (C) Part diagram (D) A, B, and C. 28. M12×1 denotes a fine-thread regular thread, with a pitch of ( ) mm. (A) 0.5 (B) 1.2 (C) 1 (D) 12. In chemical equipment diagrams, only ( ) of the tubes in a heat exchanger are usually shown in the diagram. (A) One (B) Two (C) Three (D) Four 30. The pipe layout diagram should show arrows indicating the flow direction of the medium, and ( ) should be marked above the pipes. (A) Pipe number (B) Pipe diameter (C) Material (D) A and B. Answer: A, D, C, A, D. The above questions are taken from “Advanced Questions for Ammonia Synthesis Operators”; the scoring starts at 3 points, with 1 point added for each correct answer. It should be specifically noted that respondents are required to hide their answers. If the answerer’s score is not hidden, it is halved. For how to hide a post, see: http://bbs.hcbbs.com/thread-1551107-1-1.html There might be a lot to do tomorrow, so I’m posting it earlier tonight.