One Question per Day on Synthetic Ammonia 345 (Saturday, 1-7-2012)
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Multiple-choice question: 1. The accuracy class of the thermometer used in small ammonia synthesis plants that use natural gas as a raw material is ( ) grade. (A) 2.0 (B) 1.0 (C) 1.5 (D) 0.5 2. The common types of thermocouples are ( ). (A) Platinum-rhodium-platinum (B) Nickel-chromium-nickel-aluminum (C) Nickel-chromium-copper (D) A and B, C. The purpose of the \"One Question per Day\" activity on the basics of ammonia production is to review the knowledge we have already learned; it aims to improve and strengthen everyone’s fundamental theoretical knowledge by allowing them to recall what they know, recover forgotten information, and discuss controversial points in order to make progress together. 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 view the hidden method, go to: http://bbs.hcbbs.com/thread-492556-1-1.html. Please do not edit after replying. Answers C D
DA replied 1# zhengrd
The answer is: 1, C； 2、D
1. The accuracy of the thermometers used in small ammonia synthesis plants that use natural gas as a raw material is of (C) grade. (A) 2.0 (B) 1.0 (C) 1.5 (D) 0.5 2. The common types of thermocouples are (A). (A) Platinum-rhodium-platinum (B) Nickel-chromium-nickel-aluminum (C) Nickel-chromium-copper (D) A and B, C