One Question per Day on Synthetic Ammonia (Series 50)

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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) Continuation of Series 49: 1. The pipeline in the synthesis tower that is subject to both high temperature and high pressure is ( ). A. Outlet pipe of the synthesis tower B. Middle-layer protection tube of the thermocouple C. Inner-layer protection tube of the thermocouple D. Inlet pipe of the synthesis tower 2. The ZnO desulfurizer contains a small amount of MnO2; to improve its activity, it needs to be reduced before use, and the reducing agent is ( ) in the feed gas. A. H2 and O2 B. CO and CO2 C. CO and H2 D. H2 and N2 3. Activated carbon can directly adsorb ( ) from the feed gas. A. COS B. COS and C4H4S C. CS2 and RSH D. CS2 and C4H4S 4. When producing ammonia, which method can be used to increase the equilibrium ammonia content? A. High temperature and high pressure B. High temperature and low pressure C. Low temperature and low pressure D. Low temperature and high pressure 5. On-site production management requires “three types of protection”, namely ( ). A. Protection against chemical energy injuries, protection against mechanical energy injuries, and protection against electrical energy injuries B. Self-protection, equipment protection, and environmental protection C. Protection against chemical energy injuries, protection against kinetic energy injuries, and protection against electrical ignition injuries D. Plant protection, personal protection, and equipment protection Answer: CCDDB Scoring criteria: 3 points for participation, 1 point for each correct answer