Some questions for petrochemical technicians

Thread Content

Supplementary materials for petrochemical technicians and senior technicians * I. Fill-in-the-blank questions 1. The main factors affecting product quality include ________, ________, ________, ___________, ________ and testing. 2. In a series circuit, the current is _____ everywhere, and the total voltage equals the __________ across each resistor. 3. When the pH value of a solution increases by 1 unit, the hydrogen ion concentration becomes ___________ times greater. 4. 1 standard atmosphere = _______ mmHg = ______ Pa = ______ kg/cm2. 5. During fluid flow, the volume of fluid that passes through a conduit per unit time is called _______________, and its unit is ___________________. 6. The main components of a centrifugal pump are _________, __________, __________. 7. The three basic modes of heat transfer are _______, _______, _______. 8. Depending on the methods used in the distillation process, it can be divided into ___________, ___________, and _______________. 9. During the evaporation process, only the solvent is ____________, while the solute is _______. 10. A substance that loses ______ during a chemical reaction is a reducing agent, and it itself is _____ed. 11. The current technical standards in our country are __________, ___________, ____________, ____________. 12. The safe voltages for use with lanterns, as well as the supply voltages for indicator lights, are ____, _____, ____ , ____. 13. When the pH of the solution is 1, the solution is _________ and equals ______ mol/L. 14. Matter is composed of _______ and __________, while atoms are made up of ____________ and ________. 15. In safe production, equipment operation requires mastering the “four understandings and three skills”; the “four understandings” refer to ___________, __________, __________, and ______________. 16. The fundamental equation of fluid statics is ___________________, and from this equation, the variation pattern of ___________________________ can be determined. 17. Based on different principles, pumps are generally divided into three categories: ________, ________, _______________. 18. Achieving _________________________________ is called a heat exchanger. 19. The necessary conditions for the evaporation process are that it must ____________________ and ____________________. 20. Depending on the operating pressure, distillation can be divided into ______, _____ and ______. 21. TQC stands for ________, ________, ________. 22. The flow meters used in industry are roughly __________, __________, ___________. 23. A fluid is a substance that has __________, and it includes ______ and _______. 24. When using carbon tetrachloride to extinguish fires, firefighters should stand in ________, to prevent _______, and attention should be paid to __________ after the fire is extinguished. 25. The physical quantities that reflect the conditions during the petrochemical production process are: temperature, _________, ________, _________, _________. 26. The function of the shaft seal device is to prevent ____________ and ____________. 27. Partitioned heat exchangers are divided into two main categories: ___________ and ___________. 28. In unit operations, distillation is used to separate ____________________, while absorption is used to separate ____________________. 29. The four stages of the PDCA cycle in quality management are ______, ______, ______, _______. 30. The process by which a substance changes from a liquid state to a gas state is called _________, and it can occur through ________ and ________ two methods. 31. The density of a fluid is related to ________ and ________. 32. The basic methods of extinguishing fires are ___________, __________, ___________. 33. 1 engineering atmosphere = _______ mmHg = ______ mH2O = ______ kg/cm2 = _______________ Pa. 34. The basic principles underlying the formulation of environmental laws in our country are the principles of __________, ___________, and ________. 35. The performance parameters of a centrifugal pump are _______, ________, ______, and ______. 36. In the heat exchange process, those that transfer ______ higher amounts of ______ heat are called _______. 37. The process of heating a solution to cause part of the _____ to evaporate and be removed is called ______. 38. The gas that is not absorbed during the gas absorption process is called ___________. 39. The ratio of the volatilities of the two components is called _______________. 40. The five main characteristics of total quality management are __________, __________, _______, ______, ___________. 41. Common fire extinguishers include ___________, ______________, _______, and _______________. 42. In an alkaline solution with a concentration of 42%, we call the alkali _______, and water _______. 43. _____________________________ is called the density of an object. Using the formula _________, the unit is _________. 44. Gas compression machinery is classified according to its compression ratio into _________, _______, __________, and ______________ four categories. 45. The “terpenes” produced by ethylene plants, namely __________, __________, ____________, and the “triphenyls”, namely _______, _________, __________, are basic raw materials for other organic substances and the “three major synthetic materials”, namely ___________________, ____________________, ___________________. Among them, ethylene is mainly used to produce ___________. 46. During the maintenance and cleaning of three-phase asynchronous motors, it is not allowed to use ________ for cleaning, in order to prevent damage to ________. 47. liquefaction is the process of converting _________ into _________. 48. During heat exchange, the _______ with a lower _______ of heat is called _______. 49. Strong electrolytes ______ in aqueous solution, while weak electrolytes _____ in aqueous solution. 50. In a centrifugal pump, the packing is compressed by the gland between _________ and _________, thereby achieving the purpose of _________. 51. When switching between pump units, the _________ unit should be started first, and then the _______ unit should be stopped. 52. When condensing gas in a heat exchanger,________ should be introduced first, and __________ later. 53. In the evaporation process, it is necessary to continuously _________ and remove ______________. 54. When starting a single-stage centrifugal pump, it is necessary to close ____________ in order to prevent the motor from being ____________ due to excessive ___________. 55. When heating a certain oil with steam, the steam should flow through the _______ of the heat exchanger, while the oil should flow through ________. 56. Parallel-feed multi-effect evaporation is suitable for those solutions whose viscosity increases significantly as ________ rises and ________ decreases. 57. Filtering gas masks must not be used in areas where the concentration of toxic gases exceeds ________ of the total concentration. 58. Safety work must adhere to the “four-all management” principle of _______, ________, _______, and ________.