Stress, ksi 220 200 180 160 140 120 100 80 Question P: Data for an extension spring is shown in the table below. Use only this table for this question! Also shown is an abridged version of Table 18-2 and figure 18 Spring Material ASTM A228 Music wire Max Operating Load: Fo= 21 Type of Service = Average Estimated Wahl Factor: K = 1.200 Required Mean Diameter: D = 0.550 Design Stress in Wire: Td 90,000 psi TABLE 18-2 Wire Gages and Diameters for Springs Gage no. U.S. steel wire gage¹ (in) Music wire gage² (in) 0.6 26 0.0181 0.063 27 0.0173 0.067 28 00162 0.071 29 00150 0.075 30 00140 0.080 31 0.0132 0.085 22 0.0128 0.090 33 00118 0.095 34 0.0104 0.100 35 0.0095 0.106 36 0.0090 Wire diameter, mm Compression and extension springs, Music Wire, ASTM A228 O'S 5.4 5.8 6.2 0.112 1515 1380 Light service 1240 1100 Average service 965 Severe service 825 690 Wire diameter, in OLIO 0.190 0120 0.250 550 Stress, MPa FIGURE 18-9 Design shear stresses for ASTM A228 steel wire (music wire) What is the…

Endurance limit,, (psi) 100 000 80 000 60 000 Ground 40 000 20 000 As-rolled 0 50 60 70 80 90 100 110 120 Polished Machined or cold drawn As-forged 130 140 150 160 17 Tensile strength, s, (ksi) (a) U.S. customary units What is the minimum shaft diameter of D3 in inches? (Type in a three-decimal number). Note: We want to know the diameter D3, of the shaft, not the diameter at the base of a ring groove, profile keyseat or any other geometric feature on the shaft. Answer: x (3.008)

Question G: The machined shaft shown in the diagram below has the following components on it: (A) Sheave (B) Bearing (C) Sprocket (D) Bearing (E) Spur Gear Diameter D3 is located underneath Bearing B. Only the sheave at point A, the sprocket at point C and the spur gear at point E are held in place with rings. Diameter Dy is located underneath Bearing B. Only the sheave at point A, the sprocket at point C and the spur gear at point E are held in place with rings. PPENDIX 3 Design Properties of Carbon and Alloy Steels Material designation (SAE number) Condition Tensile strength Yield strength (ksi) (MPa) (MPa) Bearing Bearing 1020 Hot-rolled 55 379 207 V-belt sheave 6.00 in PD DD 1020 Cold-drawn 61 420 352 Spur gear Chain sprocket 10.00 in PD 20 FD 12.00 in PD 1020 Annealed 60 414 296 (a) Side view of shaft 10401 Hot-rolled 72 496 290 Belt drive to conveyor 1040 Cold-drawn 80 552 1040 OQT 1300 88 607 1040 OQT 400 113 779 1050 Hot-rolled 90 620 leput from water turbine Gear E drives Q to…

220 200 180 160 140 120 Stress, ksi 100 80 Question O: Data for an extension spring is shown in the table below. Use only this table for this question! Also shown is an abridged version of Table 18-2 and figure 18. Spring Material ASTM A228 Music wire Max Operating Load: F₁ = 57 Type of Service Average Estimated Wahl Factor: K= 1.200 Required Mean Diameter: D = 0.850 Design Stress in Wire: 1 = 115,000 psi TABLE 18-2 Wire Gages and Diameters for Springs 0.0181 27 0.0175 Gage no. U.S. steel wire gage (in) Music wire gage² (in) 0063 0.067 28 0.0162 0.071 29 0.0150 0.075 30 00140 0.080 31 0.0132 0085 32 00128 0.090 33 00118 0096 34 0.0104 0.100 35 0.0095 36 0.0090 1.8 Wire diameter, mm 0.106 0.112 5.4 5.8 6.2 1515 Compression and extension springs, Music Wire, ASTM A228. 1380 Light service 1240 Average service 1100 965 Severe service 825 690 P10100 OSO 0 0.150 0.170 061'0 0.210 0.230 F 0.250 550 Stress, MPa Wire diameter, in FIGURE 18-9 Design shear stresses for ASTM A228 steel wire (music…

Please see attachment.

Please see attachment.

P3: A differential band brake shown in the figure below uses a woven lining having a design value of the friction coefficient f=0.20. Dimensions are b=80 mm, r=250 mm, c=700 mm, a = 150 mm, s=35 mm, and 0=240°. Find 1) the brake torque if the maximum lining pressure is 0.5 MPa, 2) the corresponding actuating force F, and 3) the values of dimensions that would cause the brake to be self-locking. (25%) -240° F-250 mm Band width, b-80 mm Rotation Friction coefficient, -0.20 Maximum lining pressure, P-0.5 MPa 3-35 mm la-150 mm e-700 mm-

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A particular furnace is shaped like a section of a cone. The top surface of the furnace is uniformly heated by a resistance heater. During operation, the top surface is measured to be 800 K and the power supplied to the resistance heater is 1750 W/m². The sidewall of the furnace is perfectly insulated with ε = 0.2. If the emissivity of the top and bottom surfaces are ε = 0.5 and > = 0.7, respectively, determine the temperatures of the sidewall and the bottom surface of the furnace. A1 D₂ = 20 mm A₂ L = 50 mm D₁ = 40 mm