One Question per Day on Synthetic Ammonia (Series 68)

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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 67181, the principle of water used for extinguishing fires does not include ( ). A. Smothering fire extinguishing method B. Isolation fire extinguishing method C. Cooling fire extinguishing method D. Chemical suppression fire extinguishing method 182. Which of the following belong to the industrial \"three wastes\"? A. Furnace flue gas B. Fecal wastewater C. Garbage D. Waste residues 183. The inert gas used in ammonia synthesis refers to ( ). A. CH4 and N2 B. CH4 and Ar C. CH4 and O2 D. H2 and CH4 184. For equipment used in tanks, after cleaning and purging, its oxygen content can reach ( ). A、18%～20% B、15%～18% C、10%～15% D、20%～25% 185、During ammonia synthesis, increasing the pressure has an effect on the ammonia synthesis reaction ( ). A. Both balance and speed are favorable. B. Balance is favorable, but speed is not. C. Balance is not favorable, but speed is favorable. D. Both balance and reaction speed are unfavorable. Answer: DDBAA. Scoring criteria: 3 points for participation, 1 point for each correct answer