【Daily Question】 【AC Version for Static Equipment...Question 18】 December 3, 2018 – True/False Multiple Choice...Enter to win a prize

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bg4.png【Daily Question】【AC Version for Static Equipment...Question 18】December 3, 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 question, sea friends can recommend answers; those of high quality will be rewarded, and the best answers will be highlighted. 1. The following components of a pressure vessel are considered the main pressure-bearing elements: ( ) A. Cylinder body B. Head C. Supports D. Heat exchanger tube sheets and heat exchange tubes. 2. After the pressure vessel passes the hydrostatic test, ( ) the water stains must be removed completely. A. Should B. Immediately C. Should immediately D. May 3. Pressure vessel accidents are classified into extremely serious, very serious, serious, relatively serious, and minor accidents. ( ) A. Correct B. Incorrect Answer: 1. A, B, D 2. C 3. B The classifications of pressure vessel accidents include: extremely serious accidents, serious accidents, major accidents, severe accidents, and minor accidents. Common pressure vessel accidents can be categorized into three types based on the degree of damage: explosion accidents, severely damaged accidents, and moderately damaged accidents. 1. An explosion accident refers to various types of explosions that occur when, during the use of a pressure vessel or during pressure testing, its pressure-bearing components fail; the energy stored in the medium within the equipment is released rapidly, the internal pressure drops instantly to external atmospheric pressure, and leakage takes place. 2. A severe damage accident refers to an incident in which, during the operation of a pressure vessel, the equipment has to be shut down for repair due to damage to its pressure-bearing components, safety accessories, or safety protection devices. Accidents such as fires, poisoning of personnel, and damage to equipment caused by leaks in pressure vessels also fall under the category of serious damage incidents ； 3. A general damage incident refers to an incident in which the pressure-bearing components of a pressure vessel suffer minor damage during operation, without the need to stop operations for repairs. Based on the casualties or direct economic losses caused by production safety accidents (hereinafter referred to as accidents), accidents are generally classified into the following categories: (1) Extraordinarily serious accidents refer to those that result in 30 or more deaths, or 100 or more severe injuries (including acute industrial poisoning, the same hereafter), or direct economic losses of over 100 million yuan ； 　　(II) A major accident refers to an accident that results in 10 to 30 deaths, or 50 to 100 serious injuries, or direct economic losses of between 50 million yuan and 100 million yuan ； 　　(III) A major accident refers to an accident that results in 3 to 10 deaths, or 10 to 50 serious injuries, or direct economic losses ranging from 10 million yuan to 50 million yuan ； 　　(IV) A general accident refers to an accident that results in 3 or fewer deaths, 10 or fewer serious injuries, or direct economic losses of less than 10 million yuan. 　　The department under the State Council responsible for work safety supervision and management may, in conjunction with relevant departments of the State Council, formulate supplementary regulations on the classification of accident levels.