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eering Desig A hard-drawn steel wire extension spring has a wire diameter of 0.035 in, an outside coil diameter of 0.248 in, hook radii on=0.106 in and r.. 0.089 in, and an initial tension of L19 lbf. The number of body turns is 12.17. From the given information (a) Determine the physical parameters of the spring. (b) Check the initial preload stress conditions (e) Find the factors of safety under a static 5.25-lbf load 6
(This is circulating cooling water to steam flow) xample: Find the ratio of circulating water to steam flow if the condenser pressure is (0.04 bar), and cooling tower cools the water to 15 C. Assume turbine exhaust a 85% quality.
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Answer #1

@ Dr 0.248-0.035 = 0.213 Lnch ,L= 0.213 = 6.086 d0,035 kB= 4c+2 4 (60862+2-1.234 = 千C-3 4(6.086)-3 28.7 . (0.035)+ (bI0.9126 8(o z13 12s7) 10,035 0.8ほinch ご [2(6.086)-1-t12- The dellection ndon the Serwiu lead, ほ.gi awhen the Sping tangth becom 15.1 s TT43 π (0.035)3 Phetfnes arge C33 S0D 今て仔 21.2, 14, 2 ks dm [o,035) .19 8(1.234)l s.25)[0,2/3) (1 (0,035)3 ) Frum)- TTd3 Shean stress , Coux- gk Fer the end -hoek bending at A, 6S 210-106), 0 035 6ич 4 -22 - 442-4-1-1.14 , 44 (G)

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