One Question per Day on Synthetic Ammonia (Series 63)

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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 62: 156. The components of a process flow diagram with control points include (). A. Equipment, pipelines, instruments, valves, diagrams, and title blocks B. Plant building C. Equipment and plant building D. Block flow diagram 157. The activity of a catalyst depends on its ( ). A. Hardness B. Chemical properties C. Pore structure D. Service life. 158. The noise standard for work areas in the production workshops of chemical enterprises is ( ) decibels. A、80 B、85 C、90 D、95159. The basic and effective measure to prevent electric shock accidents caused by human contact with live metal enclosures is ( ). A. Use of safe voltage levels B. Protective grounding and bonding C. Wearing appropriate protective equipment D. Use of safe current levels. 160. The combustion rate of flammable gases mainly depends on ( ). A. Liquid evaporation rate B. Temperature of the liquid C. Diameter of the storage tank D. Water content in the liquid. Answer: ABBBA. Scoring criteria: 3 points for participation, 1 point for each correct answer