【Daily Question: Pump Equipment】True or False Question 5/31/2019
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This post was last edited by 3983596_FPPZ on 2019-5-31 08:19. Rules for answering questions and managing the post: 1. If all answers to a question are incorrect, those who participate actively will receive 2 Wealth points; replies that are not answers will not be rewarded； 2. In the answer section, a correct answer earns 5 wealth points ； A reward of 8 wealth for all correct answers ； 3. Rewards for answers are available once per person only ； 4. Each reply allows for only one management rating ； 5. The answer and explanation will be visible after responding ； 6. The reply reward is valid for 48 hours. Studying* and winning awards again; come by here every day. 1. Judgment: If the temperature value displayed by the thermoresistive sensor PT100 fluctuates significantly from moment to moment, it indicates that the temperature being measured is unstable and experiences noticeable variations ( ). 2. Fill in the blank: When a pressure-bearing component is subjected to a hydrostatic test, if the pressure starts to drop continuously upon application of pressure, and after some time the pressure stabilizes without any changes, and no leaks are detected in either the testing machine or the pressure-bearing component, while the temperature remains constant throughout, this indicates ( ). Answer: 1. Incorrect (indicating a problem with the instrument itself, an installation issue, or interference) ； 2. The pressure-bearing components exhibit certain issues with compression deformation
1. Error； 2. The pressure-bearing components exhibit certain issues with compression deformation
1. Error 2. The pressure-bearing component may be deformed
1. Error, 2. Plastic deformation of the pressure-bearing component
It is unknown whether the deformation is elastic or plastic; it is possible that the deformation reverses after pressure is released (elastic), or it may not reverse (plastic)
Theoretically, that’s the case, but during a hydraulic test, due to elastic deformation, the pressure generally does not decrease, as the strain is too small; thus, no drop in pressure can be observed during the pressure increase process. (This assumes that the pressure increase is not very significant and that the pressure is measured using strain gauges, but this approach is usually used only in laboratories or for studies related to strain strengthening.) Only when plastic deformation occurs will a decrease in pressure be reflected on the pressure gauge. ,
1, Correct 2, Passed hydrostatic test
1. Error. 2. In a confined space, higher liquid temperature results in greater pressure.