【Daily Question】 【AC Version for Static Equipment...Question 33】 December 18, 2018 – True/False Multiple Choice...Enter to win a prize

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bk07.jpg【Daily Question】【AC Version for Static Equipment...Question 33】December 18, 2018 – True/False multiple-choice question...... Please enter the answers (multiple choice, single choice, single choice) in order. Reward rules: 1 wealth for participation, 3 wealth for each correct answer, up to a maximum of 10 wealth. This topic is valid for two days; no score will be given if it exceeds two days by 48 hours. At the start of this topic, sea friends can recommend [Weekly Topics] and participate in the following two [Weekly Topics] links. The daily question will be replaced by weekly topics; suggestions for these weekly topics are welcome, and there will be Haichuan coins as rewards. https://bbs.hcbbs.com/thread-2192586-1-1.html 【Weekly Topic】【Static Equipment Discussion Forum...Question 1】 December 8-16, 2018...Discussion on welding deformation – HaiChuan coins as rewards https://bbs.hcbbs.com/thread-2192846-1-1.html 1. Which of the following situations constitutes major maintenance for pressure vessels: (). A. Replace the main stressed components. B. Repair the longitudinal and circumferential seams of the cylinder (section) and the head. C. Repair the seams of the head. D. Perform repair welding on joints that use full penetration butt joints. 2. Among the following properties, which one does not belong to the mechanical properties of metal materials?: () A. Strength B. Plasticity C. Toughness D. Wear resistance 3. Before installing a pressure gauge, it should generally be calibrated first. ( ) A. Correct B. Incorrect Answer: 1. A B C D 2. D 3. B The Metrology Law stipulates that pressure gauges used for safety purposes must be calibrated; note that it is calibration, not verification. These are two different things. Inspection is also carried out on TSG. Newly purchased pressure gauges should be calibrated before use. (Correct – other websites) According to the **Measurement Law and its implementing regulations, measurement instruments must be classified for management. Different categories of instruments have different calibration cycles; they are generally divided into three categories: A, B, and C. Instruments in category A are those that require mandatory calibration, such as various detectors for flammable substances, toxic gases, fire, and smoke, as well as instruments used in commercial measurements (with a recommended calibration cycle of 3 to 6 months) ； Class B refers to transmitters used for on-site control and measurement (pressure, temperature, flow rate, level, control valves); they are considered important process measuring instruments (with a recommended calibration interval of 12 months) ； Category C refers to measuring instruments used in non-critical areas on-site, such as on-site pressure gauges, thermometers, on-site indicating level gauges, rotameters, etc. (The recommended calibration interval is 18–24 months.) For instruments of low value and high wear and tear, such as pressure gauges and thermometers, a one-time calibration is also carried out. In the past, companies would conduct assessments for upgrading their measuring equipment, and these tasks were generally handled by the local metrology authorities. Additionally, it is stipulated that measuring instruments must be calibrated at the location where they are used; even if the manufacturer provides a calibration certificate, re-calibration is still required on-site (random inspections can be conducted in batches). Large petrochemical companies have dedicated departments responsible for this task.