One Question per Day on Synthetic Ammonia (Series 71)
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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 70196: During the gas production stage, a high furnace temperature can increase the content of ( ) in the gas. A. H2 and CH4 B. H2 and N2 C. H2 and CO2 D. H2 and CO 197. As the content of inert gases in the fresh gas increases, the ammonia content at the outlet of the synthesis tower ( ). A. Increase B. Decrease C. Remain unchanged D. Irrelevant. 198. The typical duration of one working cycle in the intermittent production of semi-water gas is ( ). A. 1–1.5 points B. 1.5–2 points C. 2.5–3 points D. 3–3.5 points 199. Increasing pressure increases the reaction rate of ammonia synthesis ( ). A. Increase B. Decrease C. Remain unchanged D. Irrelevant 200. As the conversion reaction proceeds and the conversion rate increases, the optimal temperature ( ). A. Decrease B. Increase C. Remain unchanged D. No difference Answer: DBCAA Scoring criteria: 3 points for participation, 1 point added for each correct answer
The answer is D B C D A
DBCAA~~~~~~~~~
196. During the gas production stage, a high furnace temperature can increase the content of (A) in the gas. A. H2 and CH4 B. H2 and N2 C. H2 and CO2 D. H2 and CO 197. As the content of inert gases in the fresh gas increases, the ammonia content at the outlet of the synthesis tower (A). A. Increase B. Decrease C. Remain unchanged D. Irrelevant. 198. The typical working cycle time for the intermittent production of semi-water gas is (B). A. 1–1.5 points B. 1.5–2 points C. 2.5–3 points D. 3–3.5 points 199. Increasing pressure increases the rate of the ammonia synthesis reaction (A). A. Increase B. Decrease C. Remain unchanged D. Irrelevant 200. As the conversion reaction proceeds and the conversion rate increases, the optimal temperature is (B). A. Decrease B. Increase C. Remain unchanged D. No difference