One Question per Day on Synthetic Ammonia (Series 41)

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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 40201: When reducing catalysts in the ferro-chromium series, the reducing medium commonly used is ( ) in coal gas. A. H2 and CO B. H2 and N2 C. H2 and CO2 D. H2 and O2 202. In the conventional medium-pressure ammonia synthesis process, fresh gas is added in ( ). A. Synthesis tower B. Oil separator C. Ammonia separator D. Water cooler 203. When carrying out CO conversion, using ( ) method can increase the CO conversion rate. A. Increase pressure B. Increase CO2 C. Decrease pressure D. Decrease CO2. 204. As the CO content in the fresh gas increases, what happens to the ammonia content at the outlet of the synthesis tower? A. Increase B. Decrease C. Remain unchanged D. Irrelevant. 205. When making adjustments, what is an effective method for controlling the temperature of the catalyst bed? A. Change the operating pressure. B. Change the composition of the gas fed into the furnace. C. Change the space velocity. D. Change the amount of steam used. Answer: ABDBD. The scoring scale starts at 3 points; 1 point is added for each correct answer, and an additional 1 point is given for completely correct answers.