【Daily Question】 【AC Version for Static Equipment...Question 97】 April 7, 2019 – Revised multiple-choice questions...Everything is going well

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bg4.png【Daily Question】【AC Version for Static Equipment...Question No. 97】 April 7, 2019. Modified multiple-choice question...Everything is going well. ...........................................................................The question is taken from the standard NB/T 47041-2014 \"Tower Containers\". Please point out any inaccuracies in the modifications; if you have any good suggestions, feel free to reply with them – rewards will be given generously. ........................................................................... Answers (multiple choice, multiple choice, multiple choice) please fill in in order. Reward rules: 1 wealth for participation, 3 wealth for each correct answer, up to a maximum of 10 wealth. ...........................................................................1. Foot bolts should preferably be made of Q235 in accordance with GB/T700, or Q345 in accordance with GB/T1591. The allowable stress for Q235 is ( ) MPa ； The allowable stress for Q345 is ( ) MPa. If other carbon steels are used, ns=1.6 ； If other low-alloy steels are used, ns≥1.6. (The answer is:) A, 147, 147 ； B, 147, 170 ； C, 170, 147 ； D, 170, 170 ； ---------------------2. The metal materials used for the skirt shell are divided into those for the transition section and those for the main body of the skirt shell; the material selected for the transition section should be the same as that of the tower shell with which it is welded together. （）A、Correct ； B. Incorrect ； ---------------------3. The allowable stress of the anchor bolts is the same as that of the foundation ring, cover plate, and gusset plate made of the same material: 147 MPa for carbon steel ； For low-alloy steel, 170 MPa is used. （）A、Correct ； B. Incorrect ； ---------------------Answer: (Assessing the material of non-compressive components in tower-type containers) 1. B 2. A 3. B (If other carbon steels are used for the foundation bolts, then ns=1.6) ； If other low-alloy steels are used, ns≥1.6. Allowable stress for the materials of the base ring, cover plate, and gusset plates: 147 MPa for carbon steel ； For low-alloy steel, 170 MPa is used. ）