One Question per Day on Synthetic Ammonia – Multiple Choice 238 (16/9-2011)

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Multiple-choice question (single choice) 1. The main reasons for the increase in methane content at the outlet of a two-stage furnace may be (), poisoning； A. High strength B. Overpressure C. Low load D. Low temperature 2. Lubricant becomes cloudy at lower temperatures; this may be due to ( ) ； A. Emulsification deterioration B. Paraffin crystallization C. Mechanical impurities D. Ash. The purpose of the daily quiz on basic knowledge in ammonia synthesis production is to review the knowledge we have already learned, to improve and strengthen the fundamental theoretical knowledge of all participants, to help them remember what they know, to restore memories that have been forgotten, to foster discussion on controversial points, and to achieve common 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: 1.D 2.B