【Daily Quiz 042】Basic Knowledge of Control Systems (Please hide the answer)

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This post was last edited by LZ Gas Station on 2009-9-21 at 15:04. Currently, all members have the permission to use hidden replies; please cooperate actively. No ratings will be given unless replies are not hidden. Out of 10 points, additional points will be given to the top five correct answerers. Also, be careful when posting – edits are invalid! Those with different views on the provided answer keys can post discussions the next day. To hide the method, please click here: Hide Method. For multiple accounts on the same IP, only the first response counts as valid. Multiple-choice question: 1. The pressure and temperature adjustments made in traffic compensation are used to correct （ ） errors. A. Systematic error B. Random error C. Negligence error D. Additional error 2. A range-regulating system generally has （） control valves. A、1 B、2 C、3 D、4 3. Which of the following characters does not represent a thermocouple calibration number? （） A. B B.R C.P D.S 4. The required environmental temperature in a DCS room is within （ ） A. Below 20°C B. 16–28°C C. 25–30°C D. 20–25°C 5. When working with instruments that handle toxic gases, in addition to having at least two people present and standing upwind of the instruments, it is also necessary to （ ） A. Wear a gas mask B. Have all the necessary instrument tools with you C. Wear a mask D. Not carry out the operation. True or False: 6. Feedforward control is a type of control that operates based on the difference between the parameter being controlled and its desired value. 7. Errors arising from measurement methods and theory are random errors. 8. If the pressure gauge for ammonia on the ammonia pipeline is damaged, it can be replaced with a pressure gauge capable of withstanding the same pressure range. 9. The measurement circuit for measuring steam flow generally requires temperature and pressure compensation in order to correct dynamic errors. 10. In riot control areas, when cables are installed along process pipelines, if the density of the process medium is greater than that of air, the cables should be located above the process pipelines. Reference answer: ABCDA True False False False True