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At the intersections of the fixed tie rods, cross-welding or welding to the fixing plate is employed. D. The upper and lower connection points of the tie rods with the support columns should be at the same elevation. Answer: ABCD. Explanation: According to GB12337-2014, page P24, clause 5.5.1, in line with GB/T12337-2014 \"Steel Spherical Storage Tanks\", and considering the structural characteristics of the tie rod systems in spherical tanks, answer the following questions 4-1049: When calculating the minor diameter of the threads on the tie rods, the corrosion allowance for these rods is generally taken as ( ) mm. A.0 B.1 C.2 Answer: C Explanation: As specified in GB12337-2014, paragraph 6..10.1 of P40, the value for CT is 2 mm. According to GB/T12337-2014 \"Steel Spherical Storage Tanks\", taking into account the structural characteristics of the tie rods in such tanks, answer the following questions from 4 to 1050. Regarding the influence coefficient of tie rods on the natural vibration period of spherical tanks, the higher the connection point between the tie rod and the support, the smaller the natural vibration period of the tank, and the lesser the horizontal force exerted by the tie rod on the support. ( ) A. Correct B. Incorrect Answer: B Explanation: According to pages P28-29 of GB12337-2014, and in line with GB/T12337-2014 \"Steel Spherical Storage Tanks\", for the design calculations related to the supports of spherical tanks, questions 4-1051 state that the upper and lower connection points of the tie rods and supports should be at the same height; this ensures that the load is distributed evenly across all supports, resulting in better overall stress distribution for the spherical tank. ( ) A. Correct B. Incorrect Answer: A Explanation: According to clause 5.5.2 of P25 in GB12337-2014, and in line with GB/T12337-2014 \"Steel Spherical Storage Tanks\", for the design calculations related to the supports of spherical tanks, the maximum bending moment must take into account horizontal seismic forces and horizontal wind forces. ( ) A. Horizontal seismic force B. Vertical seismic force C. Horizontal wind force D. Distance from the equatorial plane to the center of the upper support pin Answer: A, C Explanation: According to GB12337-2014, section 6.6 on page P31, for the design calculations of the supports of steel spherical storage tanks as specified in GB/T12337-2014, answer the following questions 4-1053. The loads considered in the calculation of these supports include ( ) A. Gravity load B. Vertical load generated by the maximum bending moment on the supports C. Vertical load exerted on the supports by tie rods D. Deflection moments and additional bending moments Answer: A, B, C Explanation: According to GB12337-2014, section 6.7.1.4 on page P33, for the safety accessories of steel spherical storage tanks as specified in GB/T12337-2014, answer the following question 4-1054. Which of the following are considered safety accessories for spherical storage tanks? ( ) A. Overpressure relief devices B. Level gauges C. Grounding devices D. Ladder platforms Answer: A, B Explanation: According to GB12337-2014, section B.1.2 on page P62, for the safety accessories of steel spherical storage tanks as specified in GB/T12337-2014, answer the following question 4-1055. Regarding overpressure relief devices for spherical storage tanks, which of the following statements are correct? ( ) A. Spherical storage tanks containing explosive liquefied gases should be equipped with at least 2 safety valves, and the discharge capacity of each safety valve must be sufficient to meet the maximum discharge requirements of the tank in an emergency situation. B. When two or more safety valves are installed at a single connection port of a spherical tank, the cross-sectional area of that connection port shall be no less than the sum of the inlet cross-sectional areas of the safety valves. C. For spherical tanks containing explosive media, or media with an extremely high, high, or moderate level of toxicity, a conduit must be installed at the outlet of the relief device; the flare header is used to direct the released media to a safe location where it can be properly disposed of. D. When a container is equipped with a relief device, the design pressure of the container is generally used as the starting pressure for determining the overpressure limit of the container. When necessary, the maximum allowable operating pressure of the container can be used as a starting point for the container’s overpressure limit. Answer: A, B, C, D. Explanation: According to B.2 in P62 of GB12337-2014 and B.3.1 in P17 of GB150.1-2011, and in line with GB/T12337-2014 \"Steel Spherical Storage Tanks\", regarding the safety accessories of spherical tanks, complete the following questions 4-1056: The opening nozzles of spherical tanks should be arranged as much as possible on the upper and lower hem plates. （） A. Correct B. Incorrect Answer: A Explanation: According to GB12337-2014, page P62, section B.1.4, for a spherical tank with a volume of 3000 m³ and 12 supports, in accordance with GB/T12337-2014 \"Steel Spherical Storage Tanks\", regarding the grounding system of such a tank, answer questions 4-1057: How many grounding units should be installed for this spherical tank? ( ) A.2 B.3 C.4 D.6 Answer: D Explanation: According to GB12337-2014, page P64, section B.9.1, for a spherical tank with a volume of 3000 m³ and 12 supports, in accordance with GB/T12337-2014 \"Steel Spherical Storage Tanks\", regarding the grounding system of such tanks, answer questions 4–1058. The grounding elements of the spherical tank should be arranged evenly or symmetrically around its circumference. （） A. Correct B. Incorrect Answer: A Explanation: According to GB12337-2014, page P64, section B.9.1, for a spherical tank with a volume of 3000 m³ and 12 supports, in accordance with GB/T12337-2014 \"Steel Spherical Storage Tanks\", regarding the grounding system of such tanks, answer questions 4–1059: The grounding resistance of the grounding system for this spherical tank should not exceed （） Ω. A.10 B.20 C.30 D.40 Answer: C Explanation: According to GB12337-2014, section P64, sub-section B.9.2, and in line with GB/T12337-2014 \"Steel Spherical Storage Tanks\", for the hydraulic testing of spherical tanks as well as the monitoring of foundation settlement, answers to questions 4–1060 must be provided. During the hydraulic testing of a spherical tank, it is necessary to monitor the settlement of its foundation; a settlement measurement plate should be welded to each pillar, at the same height. （） A. Correct B. Incorrect Answer: A Explanation: According to GB12337-2014, page P64, item B.10, and in line with GB/T12337-2014 \"Steel Spherical Storage Tanks\", regarding the hydraulic testing of spherical tanks as well as the monitoring of foundation settlement, complete questions 4-1061. After the hydraulic testing is successful, the water must be drained immediately from the tank and the area dried out. For austenitic stainless steel storage tanks, the chloride content in water should be kept at no more than ( ) mg/L. A.25B.30C.35D.40 Answer: A Explanation: According to GB12337-2014, clause 8.10.4.6.1 on page P58, in accordance with GB/T12337-2014 \"Steel Spherical Storage Tanks\", regarding the hydraulic testing of spherical tanks and the monitoring of foundation settlement, for questions 4-1062, after draining the liquid from the tank, the difference in foundation settlement shall not be greater than ( ) (where Db is the inner diameter of the spherical tank), and the difference in settlement between adjacent foundations shall not be greater than ( ) mm. A.Db/1000, 2B.Db/1000, 4C.Db/2000, 2D.Db/2000, 4. Answer: A. Explanation: According to point b) of 8.10.4.6.6 in P59 of GB12337-2014, and in line with GB/T12337-2014 “Steel Spherical Storage Tanks”, regarding the post-weld heat treatment of spherical tanks, questions 4–1063 relate to this topic. Post-weld heat treatment can be classified according to its purpose as follows: A. Stress-relief heat treatment; B. Heat treatment to restore mechanical properties; C. Heat treatment to improve mechanical properties; D. Hydrogen removal treatment. Answer: A, B, C, D. Explanation: As stated in paragraph 5 on page P325 of the older version of the Pressure Vessel Engineer Training Manual. In accordance with GB/T12337-2014 \"Steel Spherical Storage Tanks\", regarding the post-weld heat treatment of spherical tanks, complete questions 4-1064 below. Spherical tanks that meet one of the following conditions shall undergo post-weld heat treatment prior to the pressure test. ( ) A. Spherical tanks for which the design specifications require post-weld heat treatment. B. Spherical tanks prone to stress corrosion, such as those used to store liquefied petroleum gas or liquid ammonia. C. Carbon steel or low-alloy steel spherical tanks that contain extremely hazardous or highly hazardous materials. D. None of the above. Answer: A, B, C. Explanation: According to Section 8.8.3 of P56 in GB12337-2014, and in line with GB/T12337-2014 “Steel Spherical Storage Tanks”, regarding post-weld heat treatment for spherical tanks, answer questions 4–1065 below. The following spherical tanks should undergo post-weld heat treatment prior to the pressure test. ( ) A. Q345R steel spherical tank with a welded joint thickness of 20 mm; B. Q370R steel spherical tank with a welded joint thickness of 40 mm; C. 15CrMoR steel spherical tank with a welded joint thickness of 16 mm; D. 16MnDR steel spherical tank with a welded joint thickness of 36 mm. Answer: B, C, D. Explanation: According to Clause 8.8.3 of P56 in GB12337-2014 and Table 5 of P331 in GB150, as per GB/T12337-2014 “Steel Spherical Storage Tanks”, regarding the post-weld heat treatment of spherical tanks, answer the following questions 4–10. There are usually three types of welding test pieces for spherical tanks: welder qualification test pieces, welding procedure test pieces, and product welding test pieces. ( ) A. Correct B. Incorrect Answer: A Explanation: 24.12 on page P454 of the older version of the Pressure Vessel Engineer Training Manual. 1067 For each spherical tank, product welding specimens shall be prepared at ( ) and ( ) – 2 locations in total. （） A. Vertical welding, overhead welding B. Horizontal welding, vertical welding C. Vertical welding, horizontal welding + overhead welding D. Horizontal welding, overhead welding According to GB/T12337-2014 \"Steel spherical storage tanks\", regarding the post-weld heat treatment of spherical tanks, complete the following questions. 1068 For the welding test pieces of spherical tank products, the raw materials must be of qualified quality, and they must have ( ) in common with the materials used for the spherical tanks. A. Same standards B. Same grade C. Same thickness D. Same heat treatment condition. According to GB/T12337-2014 \"Steel spherical storage tanks\", regarding the shell structure of spherical tanks, answer the following questions. The shell structure types are divided into three categories: segmental type, football-segment type, and mixed type. Currently, ( ) and ( ) are widely used in domestic projects. A. Orange-section type, football-section type; B. Orange-section type, mixed type; C. Football-section type, mixed type. In accordance with GB/T12337-2014 \"Steel Spherical Storage Tanks\", regarding the structural design of spherical tank shells, answer the following questions. The structure of orange-section type spherical tanks is relatively flexible; it can be designed with different sector angles and segments based on the specifications of the raw materials and the span of the press, in order to meet the requirements of both structure and manufacturing processes. （） A. Correct B. Incorrect According to GB/T12337-2014 \"Steel Spherical Storage Tanks\", for the shell structure of spherical tanks, answer the following questions: The equatorial zone and temperate zone of a 1071 mixed-type spherical tank use （） structure, while the polar zone uses （） structure; this approach improves the utilization rate of raw materials, reduces the length of welds, and decreases the number of shell plates, making it suitable for large-scale spherical tanks. A. Orange segment style, football segment style B. Orange segment style, orange segment style C. Football segment style, orange segment style D. Football segment style, football segment style. For spherical tanks with a diameter of 1072 or less, segmented supports should be used. A. Spherical tanks containing extremely or highly hazardous media. B. Spherical tanks whose shell plate standard tensile strength is greater than or equal to 540 MPa. C. Spherical tanks with a volume of greater than or equal to 2000 m3. D. Low-temperature spherical tanks. In accordance with GB/T12337-2014 \"Steel Spherical Storage Tanks\", complete the following questions regarding the supports and equatorial plates of spherical tanks. The welding of the upper section of the 1073 segmented strut to the equatorial plate shall be carried out at the manufacturing plant. （） A. Correct B. Incorrect After the shell plates are welded together, a gauge with a chord length of not less than （） mm is used to check the curvature of the equatorial plates within （） mm outward from the weld area; the maximum allowable gap must be no more than （） mm. In the remaining areas, a gauge with a chord length of not less than （） mm is used to check the curvature of the equatorial plates, with the maximum allowable gap also being no more than （） mm. A. 2000, 200, 2, 1000, 3 B. 1000, 300, 3, 2000, 3 C. 2000, 200, 3, 2000, 2 D. 1000, 300, 2, 1000, 2 According to GB/T12337-2014 \"Steel Spherical Storage Tanks\", complete the following questions regarding the manholes and connections of spherical tanks. 1075 For spherical tanks that contain media with extremely high or high toxicity levels, the inlet and outlet openings should be located at the bottom of the tank. () A. Correct B. Incorrect. According to GB/T12337-2014 \"Steel Spherical Storage Tanks\", answer the following questions regarding the manholes and connections on spherical tanks. 1076 Regarding the manholes on spherical tanks, which of the following statements is correct? A. One manhole with a nominal diameter of not less than 500 mm should be provided at each of the upper and lower poles. B. An embedded flange reinforcement structure is recommended. C. The grade of the manhole forgings should be at least grade III. D. The manhole flanges should be wafer-type butt-welded flanges. 1077 After the manholes, pipes, and pole plates are welded together, the allowable deviation for the position of the openings and their protrusion height shall not exceed ( ) mm ； The curvature of the plate shall be checked using a gauge with a chord length of not less than ( ) mm, over the area surrounding the perforated shell plate by ( ) mm inward from the perimeter to twice the diameter of the opening outward; the maximum gap allowed is ( ) mm. A. 5,100,1000,3 B. 3,200,1000,5 C. 5,200,1000,3 D. 3,100,1000,5 According to GB/T12337-2014 \"Steel Spherical Storage Tanks\", complete the following questions regarding the post-weld heat treatment of spherical tanks. The pressure test for sphere tank 1078 should be carried out before the overall heat treatment after welding. ( ) A. Correct B. Incorrect According to GB/T12337-2014 \"Steel Spherical Storage Tanks\", complete the following questions regarding the post-weld heat treatment of spherical tanks. 1079 The decision regarding whether post-weld heat treatment is required for spherical tanks and their pressure-bearing components is made according to (). A. Material B. Weld joint thickness C. Design requirements D. Medium carried. According to GB/T12337-2014 \"Steel spherical storage tanks\", complete the following questions regarding the post-weld heat treatment of spherical tanks. 1080 The following spherical tanks shall undergo post-weld heat treatment. ( ) A. Spherical tanks that are prone to stress corrosion, such as those used for storing liquefied petroleum gas, liquid ammonia, etc. B. Carbon steel or low-alloy steel spherical tanks used to hold substances with extremely high or high toxicity. C. 16MnDR spherical tanks with a weld joint thickness of 24 mm. D. Steel spherical tanks made of Q370R material with a weld joint thickness of 34 mm. After being manufactured, spherical tanks must undergo pressure testing; the types of such testing include hydraulic testing, pneumatic testing, or a combination of both. Hydraulic testing is generally used. ( ) A. Correct B. Incorrect According to GB/T12337-2014 \"Steel Spherical Storage Tanks\", complete the following questions regarding the pressure resistance test of spherical tanks. When conducting hydraulic tests on spherical tanks made of 1082Q345R, Q370R, and 07MnMoVR, the liquid temperature must not be lower than (). A. 5℃ B. 10℃ C. 15℃ D. 20℃ The main purpose of the 1083 pressure test is to comprehensively inspect the （） of the spherical tank. A. Overall strength B. Quality of weld joints C. Strength of the spherical tank foundation D. Material defects. In accordance with GB/T12337-2014 \"Steel Spherical Storage Tanks\", answer the following questions regarding the airtightness test of spherical tanks. 1084 The airtightness test should be carried out after the pressure resistance test is successful (). A. True B. False According to GB/T12337-2014 \"Steel spherical storage tanks\", regarding the airtightness test of spherical tanks, answer the following questions. Which spherical tanks below 1085 need to undergo a leak-tightness test? A. Those containing media that are extremely or highly toxic. B. Those containing explosive compressed gases. C. Those containing explosive liquefied gases. D. Those for which minor leaks are acceptable. According to GB/T12337-2014 \"Steel Spherical Storage Tanks\", answer the following questions regarding the leak-tightness test of spherical tanks. 1086 Regarding the airtightness test of spherical tanks, which of the following statements are incorrect? ( ) A. The pressure used for the airtightness test is the design pressure of the spherical tank. B. The temperature of the gas used in the test should comply with the design drawings as well as relevant standards and regulations. C. During the test, the pressure should be increased gradually; once it reaches 50% of the specified test pressure, the pressure should be held constant for 5 minutes. After that, all welds and connections of the spherical tank should be checked for leaks, and only after confirming no leaks are present should the pressure be increased further. D. When the pressure rises to the test pressure, hold it for 5 minutes, then conduct a leak check; no leaks are considered acceptable. The pressure should be reduced slowly after the test. In accordance with GB/T12337-2014 \"Steel Spherical Storage Tanks\", complete the following questions regarding the shell plates of spherical tanks. 1087 Which of the following statements are correct regarding the arrangement of shell plates? ( ) A. The geometric dimensions of the shell plates used for pressing into spherical shapes should be as large as possible, in order to minimize the length of welds and reduce the amount of work required for installation. B. Appropriate steel plate specifications should be chosen to maximize the utilization of the material. C. There should be few different specifications, with good interchangeability between them. D. The distribution of weld locations should be even, in order to reduce assembly stresses, restraint stresses, and residual stresses. In accordance with GB/T12337-2014 \"Steel Spherical Storage Tanks\", answer the following questions regarding the shell plates of spherical tanks. The grinding depth for repairing local and surface defects in 1088 shell plates shall be less than () of the nominal thickness of the shell, and not more than (). A. 5%, 2mm B. 5%, 4mm C. 10%, 2mm D. 10%, 4mm. The shell plates must not be joined together, and their surfaces must be free from defects such as cracks, bubbles, and scars. The shell plates must not have delamination. A. Correct B. Incorrect