【Daily Quiz 107】Basic Knowledge of Control Systems

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This post was last edited by LZ Gas Station on 2010-1-4 07:36. Please hide the posting. Multiple-choice questions: 1. The appropriate operating range for a pressure gauge is generally between 1/3 and 2/3 of its range; if it exceeds 2/3, then ( ) A. There will be leaks at the joints or welds B. Dust will accumulate between the terminals C. The spring tube cannot withstand the pressure D. The accuracy will decrease over time. 2. The guiding principle for safe production is ( ). A. Safety must be taken into account in production. B. Everyone is responsible for ensuring safe production. C. Implement a responsibility system for safe production. D. Safety first, prevention foremost. 3. For controlling fluids with high viscosity, fibers, and fine particles, which valve should be used? A. Butterfly valve ； B. Sleeve valve ； C. Direct-through two-seat valve ； D, eccentric rotary valve ； E. Angle valves. 4. Ordinary pressure transmitters will generate an output only when the measured pressure is higher than (). A. Absolute zero pressure B. Atmospheric pressure C. Degree of vacuum D. Gauge pressure 5. When the process operator opens the stop valve associated with the control valve, the adjustable ratio and flow characteristics will change (). A. Daiwa-kō B. Shōwa-sa C. Daiwa-sa True or False: 6. Measurement error is the difference between the measured value and the standard value. 7. All flowmeters are characterized by the fact that the differential pressure they experience is proportional to the square of the flow rate. 8. If the accuracy of the watch to be calibrated is grade 1.5, then the accuracy of the standard watch should also be set at grade 1.5. 9. The use of differential action in the control system can eliminate pure lag. 10. The installation of the shaft vibration probe is generally carried out when the unit is at rest. Reference answer: DDDBB TFFFT