【Daily Question】【Static Equipment AC Version...Question 01】 January 1, 2019 – True/False Multiple Choice Question......Question released on New Year’s Day

Thread Content

This post was last edited by kareale88 on 2019-1-1 at 11:10: bg2.png【Daily Question】【Static Equipment Discussion Version...Question 01】 January 1, 2019 – Multiple-choice question......Wish you a happy Spring Festival and a prosperous new year! May all your wishes come true as we bid farewell to the old and welcome the new. Please fill in 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, i.e., after 48 hours. Preview! A cash red packet worth 100,000 RMB is waiting for you to claim – Special preview post for Haichuan’s original knowledge-sharing event: https://bbs.hcbbs.com/thread-2223445-1-1.html. The 2018 Haichuan Top 10 Awards selection is about to begin... https://bbs.hcbbs.com/thread-2232923-1-1.html. 1. Those that belong to the category of directly-loaded safety valves are: ( ) safety valves. A. Spring-type B. Lever-weighted hammer C. Balanced type 2. Level gauges belong to ( ) safety accessories. A. Display and display control categories B. Overpressure relief categories C. Emergency shut-off categories D. Safety interlock categories 3. Units that manufacture safety valves and burst discs do not need to hold a corresponding license for manufacturing special equipment. （）A、Correct B、Incorrect Answer: 1、 A B 2、 A 3、 B Appendix: What is the difference between ductile failure and brittle failure? Which type of damage poses a greater risk? After fracture, there is visible macroscopic deformation, and the thickness at the fracture site decreases significantly ； No fragments, or occasionally some fragments ； The blasting pressure calculated based on the measured thickness is quite close to the actual blasting pressure. During brittle fracture, the container does not swell, meaning there is no significant plastic deformation ； It occurs under lower stress conditions; its fracture surface is flat and perpendicular to the direction of maximum stress ； The breaking speed is extremely fast, often causing the container to shatter into pieces. The resulting damage is greater than that of ductile fracture. Ductile failure of pressure vessels mostly occurs during overpressure operation. (Correct)