One Question per Day on Synthetic Ammonia – Multiple Choice 301 (Wednesday, 11/2/2011)

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This post was last edited by shanypr on 2011-11-22 at 19:39. Multiple-choice question 1: Regarding the control of centrifugal compressors, a specific requirement is to prevent ( ). (A) Surging (B) Cavitation (C) Vibration (D) Cylinder collision. 2. The method of adjusting the bypass flow rate can be used to control the main flow rate at the compressor outlet; the disadvantage is ( ) (A) It is difficult to adjust, (B) It requires high energy consumption, (C) The adjustment process is complex, (D) The cost is high. The purpose of the “One Question per Day” activity on basic knowledge of ammonia synthesis production is to review the knowledge we have already learned, to improve and strengthen everyone’s fundamental theoretical knowledge through answering questions, to help those who have forgotten to recall that information, to encourage further discussion on controversial points, and to promote collective progress. The top 50 answerers will definitely receive a reward. Those who simply state the reasons for their choice will be given additional points as appropriate! Please reply with the answer hidden; otherwise it will be invalid. To hide and view the method: http://bbs.hcbbs.com/thread-492556-1-1.html-. Please do not edit after replying. Answer A; B