Basic Knowledge of Ammonia Synthesis – One Question per Day 103
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Single-choice question: 1. If “FC” is indicated next to a control valve in a PID diagram, it means that this control valve will (） when the air supply is stopped. A、Open, B、Lock in position, C、Close, D、Cannot be determined. 2. Among all the stages in the construction of chemical enterprises, ( ) is the most crucial stage. A、Design, B、Manufacturing, C、Installation, D、Commissioning. We hope all Sea View friends will participate actively; the first 50 respondents will definitely receive a reward. Please reply with the answer hidden; otherwise it will be invalid. Hidden method: http://bbs.hcbbs.com/thread-492556-1-1.html Please do not edit after replying. Answer key: 1. C, 2. A.
Reply 1# Yan Qiusheng CA