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| Q. |
Calculate minimum wall thickness given a cylindrical prestressed water tank of internal diameter 30m over a depth of 7.5m and the permissible compressive stress at transfer is 13n/mm2 and the maximum compressive stress under working pressure is 1n/mm2 and the loss ratio is 0.75? |
| A. | 43.8 |
| B. | 82.3 |
| C. | 64.5 |
| D. | 90.4 |
| Answer» B. 82.3 | |
| Explanation: d = 30m, h = 7.5m, nd = 720n/mm, ɳ = 0.75, fct = 13n/mm2, pressure is 1n/mm2 | |
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