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1. (True/False) Personnel at filling stations that fill toxic liquefied gases must wear appropriate gas masks based on the toxicity of those gases, and a dedicated person should also be assigned to regularly inspect and replace these gas masks. Answer key: Correct. 2. (True/False) An explosion-proof cap is a type of safety pressure-relief device that operates by fracture; it can be reused after repair and reset. Answer: Incorrect. 3. (True/False) Large amounts of gas and liquid can be released indoors as long as they are non-toxic and non-flammable. Reference answer: False. 4. (True or False) A differential pressure level gauge converts level measurement into differential pressure measurement. Answer key: Correct. 5. (True/False) The installation of all valves on a boiler must follow the principle of high in and low out. Answer: Incorrect. 6. (True/False) The Regulations on the Safety Supervision of Special Equipment stipulate that production and usage units of special equipment are encouraged to establish corresponding safety management systems for such equipment, energy-saving management systems, as well as systems defining responsibilities for safety and energy conservation at the individual job levels, in accordance with the needs of the enterprise. Answer: Incorrect. 7. (True/False) Since a boiler is equipped with draft fans and exhaust fans, it doesn’t matter whether the chimney is at a higher or lower height; this does not affect its operation. Answer: Incorrect. 8. (True/False) When different temperatures may occur in various parts of a container during operation, any point can be chosen arbitrarily as the design temperature for that corresponding part. Answer: Incorrect. 9. (True/False) Gas cylinder filling units are only responsible for the repackaging of gases; they are not accountable for the quality of the gases they fill. Reference answer: False. 10. (True or False) For the initial filling of cylinders containing flammable gases, or the first filling after a periodic inspection, cylinders that have not undergone purging or vacuum treatment must be treated beforehand; otherwise, filling is strictly prohibited. Answer key: Correct. 11. (True/False) After the expiration of the “Cylinder Filling License,” it is possible to continue carrying out cylinder filling work while applying for a new license. Answer: Incorrect. 12. (True/False) Workers in the production area of gas cylinder filling stations must undergo professional training and assessment, and hold the appropriate certification to work in such positions. Reference answer: Correct. 13. (True or False) A filling station may fill gas cylinders whose technical records are not kept at that filling station. Reference answer: False. 14. (True or False) When shutting down a hot water boiler, the valve at the pump outlet should be closed first, and then the pump should be turned off. Answer key: Correct. 15. (True/False) New operators, without having passed assessments or holding a qualification certificate, can occasionally operate independently when there is a shortage of staff. Answer key: Incorrect. 16. (True/False) The design temperature indicated on the pressure vessel’s nameplate refers to the operating temperature of the vessel’s shell. Answer: Incorrect. 17. (True/False) Pressure gauges, safety valves, level gauges, and alarms are all safety accessories for boilers, and none of them can be omitted. Answer key: Incorrect. 18. (True/False) The inner tank and vacuum jacket of a low-temperature storage tank do not need to undergo pressure testing for twenty years. Reference answer: False. 19. (True or False) An emergency shut-off valve is a safety device that is typically installed on the gas and liquid phase inlet pipelines of liquefied petroleum gas storage tanks, as well as tank trucks and railcars used for transporting liquefied gases. Answer key: Incorrect. 20. (True/False) The burst pressure of a rupture disc should not be greater than the design pressure of the pressure vessel. The lower its value, the higher the requirements for manufacturing the rupture disc. Answer key: Correct. 21. (True/False) In the event of an ordinary accident involving special equipment, the unit responsible for such accident shall be fined by the department in charge of supervision and management of special equipment safety between 200,000 yuan and 500,000 yuan. Reference answer: False. 22. (True or False) To ensure that there is no water shortage in a steam boiler, it is acceptable to operate the boiler with its water level kept at a relatively high level for an extended period of time. Reference answer: False. 23. (True or False) The installation of boilers must be carried out by construction units that have obtained the requisite installation qualifications. Reference answer: Correct. 24. (True or False) In the classification of industrial poisons, they are divided into organic and inorganic types based on their chemical structure. Reference answer: Correct. 25. (True or False) Gas cylinders with damaged, incomplete, or non-compliant attachments may be filled temporarily. Reference answer: False. 26. (True or False) Within a 5-meter radius around the storage, vaporization, filling, and usage areas of cryogenic liquid storage tanks, there should be no openings leading to lower-lying areas (such as basements, bomb shelters, ditches, etc.) ； The ditch shall have a liquid retaining curb. Answer key: Correct. 27. (True/False) The \"Regulations on Safety Management of Boiler Rooms\" state that when it’s time for shift handover, one can leave as long as the handover records are properly completed. Answer key: Incorrect. 28. (True/False) The boiler operator has the right to refuse to carry out any orders that are harmful to the safe operation of the boiler. Answer key: Correct. 29. (True/False) Cylinders that have passed their inspection deadline must be treated first; otherwise, filling them is strictly prohibited. Reference answer: Correct. 30. (True or False) The destructive disposal of gas cylinders must be carried out by flattening them or disassembling their bodies. Reference answer: Correct. 31. (True or False) The color markings on gas cylinders are the only way to identify the type of gas contained in them. Answer: Incorrect. 32. (True/False) The using unit shall provide safety education and training for pipeline operators to ensure that they possess the necessary knowledge for safe pipeline operations. Answer key: Correct. 33. (True/False) Pressure vessels whose safety condition rating after a comprehensive inspection is grade 1 or 2 should generally be inspected at least once every 6 years. Reference answer: Correct. 34. (True or False) To meet the needs of the safe management of pressure vessels, pressure vessel managers should be familiar with the basic knowledge regarding pressure vessel safety as well as **the contents of relevant safety regulations or technical specifications pertaining to pressure vessels.** Reference answer: Correct. 35. (True or False) All pressure vessels have the same operating procedures and methods. Answer key: Incorrect. 36. (True/False) Cylinders whose gases come into contact with each other can cause combustion, explosions, or the production of toxic substances; such cylinders can be stored in the same room. Reference answer: False. 37. (True or False) Regarding the selection of the accuracy level of pressure gauges, for low-pressure vessels, it generally should not be lower than grade 2.0 ； Medium-pressure vessels should not be below grade 1.5 ； High-pressure vessels should be Class 1. Answer: Incorrect. 38. (True/False) If a party falsifies or deliberately destroys the accident scene, destroys evidence, or fails to report the accident in a timely manner, thereby making it impossible to determine liability for the accident, that party shall bear full responsibility. Answer key: Correct. 39. (True/False) For temporary emergency use, used gas cylinders that are not refillable can be refilled again. Answer: Incorrect. 40. (True/False) When the vacuum level in the vacuum jacket of a vacuum powder storage tank drops to 65 Pa, the evaporation rate increases, which is not economical; therefore, the vacuum should be restored. Answer key: Correct. 41. (Single-choice question) Classified by pressure level, which one belongs to low-pressure vessels? () A0.1MPa≤P