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**Q1:**The data show the population (in thousands) for a recent year of a sample of cities in South Carolina. 26 26 15 29 69 21 30 29 26 20 38 85 19 23 29 25 111 47 49 108 30 38 ان بن 13 19 30See Answer**Q2:**What are four environmental impacts? Explain how and in which units each environmental impact is measured. [20 points]See Answer**Q3:**3. A simply supported composite beam (L = 4.5 m) is subjected to a positive bending moment (680 N-m) at both ends. The beam is made of two materials in a square cross-section. Material 1 is 50x50mm and is surrounded by a 25 mm shell of material 2. Solve for the maximum stress in each material. E1 = 100 GPa, E2 200 GPa. (10 pts)See Answer**Q4:**3) For the bearing application specifications given in the table for the assigned problem, determinethe Basic Load Rating for a ball bearing with which to enter a bearing catalog of manufacturer 2in Table 11–6. Assume an application factor of one. (10pts)3. Repeat this scenario 3 times with different desired reliability (95, 99)% ,different life, and different catalog manufacture (1) while all are held the same. How does that effect the design? (10pts). See Answer**Q5:**(a) What are the maximum and minimum diameters allowed for the boss? (b) What is the effect of the position tolerance of 0.2 on the diameters specified in part (a)? (c) The position control defines a tolerance zone.Specifically, what must stay within that tolerance zone? (d) What is the diameter of the tolerance zone if the boss is produced with a diameter of 50.3? (e) What is the diameter of the tolerance zone if the boss is produced with a diameter of 49.7? (f) Describe the significance of the datum references to the determination of the position tolerance zone. 3) What is the perpendicularity tolerance with respect to datum A? (Select one.) i. Not defined. ii. Controlled by the position tolerance; 0.2 at MMC to 0.5 at LMC. iii. Controlled by the size tolerance; 0.3. iv. Must be perfectly perpendicular; 0. What controls the cylindricity? (Select one.) i. There is no control on the cylindricity. ii. From Rule #1, the envelope of a perfect cylinder with diameter of 50. iii, From Rule #1, the envelope of a perfect cylinder with diameter of 50.3. iv. From the position control, the center axis of each cross section must be within the0.2 cylindrical tolerance zone.See Answer**Q6:**2) The weldment shown in the figure is subjected to an alternating force F. The hot-rolled steel bar has a thickness h and is of AISI 1010 steel. The vertical support is likewise AISI 1010 HR.steel. The electrode is given in the table below. Estimate the fatigue load F the bar will carry if three fillet welds are used. (10pts) Repeat this scenario 3 time with different grade electrode (E7XXX, E8XXX...etc) and different grade AISImaterial while all are held the same. By changing electrode, material property, load, application, how does that effect the design? (10pts). See Answer**Q7:**5) An eight-cylinder diesel engine has a front main bearing with a journal diameter of 3.500 in and a unilateral tolerance of 20.003 in. The bushing bore diameter is 3.505 in with a unilateral tolerance of10.005 in. The bushing length is 2 in. The pressure-fed bearing has a central annular groove 0.250 in wide. The SAE 30 oil comes from a sump at 120°F using a supply pressure of 50 psig. The sump's heat-dissipation capacity is 5000 Btu/h per bearing. For a minimum radial clearance, a speed of 2000rev/min, and a radial load of 4600 lbf. Find the average film temperature and apply Trumpler's criteria in your design assessment. (10pts). Repeat this scenario 3 times with different grade SAE oil, different supply pressure and different speed while all are held the same. What can you conclude by changing these parameters and how does that effect the design? (10pts).See Answer**Q8:**Summary:-In this project interest of minimizing the heat energy required for heating the air to kill corona virus at 200-degree Celsius. This project having two heat exchanger HX1 & HX2, need to design that heat transfer is maximum. Use both methods NTU and LMTD method to calculate the required area of the heat exchanger, both get the same.Approach to the work:- first, we calculate the velocity of flow rate by using the given data volume flow rate and cross sectional area, and assume that flow velocity of air overall system is the same.Calculate the mass flow rate of air and as well as water, and calculate heat capacitance of both.Heat capacitance(mc) of both fluids is the same, hence the heat capacity ratio is 1.calculation of overall heat transfer coefficient by assuming that the heat transfer coefficient of air and water are shown in the calculation page.At last, calculate the required area of heat exchanger which is 19.328m2.For calculation of the number of row tube we assume that length of the heat exchanger is 1m,the number of row tube is to be equal to 19 tubes, the same process are used for heat exchanger The key concluding remark:-the number of tubes is 19 of 17 cm radius, single row.the required area is equal to 19m2.See Answer**Q9:**Problem 2. For the same bend steel shaft described in Problem 1. Calculate the displacement of point B in x direction and y direction use (1) method of superposition; (2) Castigliano's method. See Answer**Q10:**Problem 5. Use the table and figure given below, estimate the following for a 1035 HR steel(a) the rotating-beam endurance limit at 10° cycles.(b) the endurance strength of a polished rotating-beam specimen corresponding to 10 cycles to failure(c) the expected life a polished rotating-beam specimen under a completely reversed stress of 28 kpsi. See Answer**Q11:**Problem 3. Draw shear force and bending moment diagrams for the beam shown in the following figure. The beam has a rectangular cross-section with a height of 200 mm and a width of 150 mm. Calculate the deflection of point C using moment-area method. Assume E for the wood beam is 10 GPA. See Answer**Q12:**Problem 4. The A992 steel (E = 29 x 10 psi, oy=50,000 psi) bar AB has a solid square cross section. Bar BC has a solid round cross section (dia=0.75"), is made of the same material as bar AB. Both are pin connected at its ends, determine the maximum allowable load P that can be applied to the frame. Consider the possibility of tensile failure of bar BC (use maximum shear stress failure theory) and buckling of bar AB. See Answer**Q13:**1) The section of shaft shown in the figure is to be designed to approximate relative sizes of d = 0.75D and r = D/20 with diameter d conforming to that of standard metric rolling-bearing bore sizes. The shaft is to be made of AISI 4140 steel, heat-treated to obtain minimum strengths in the shoulder area of 951 MPa ultimate tensile strength and 834 MPa yield strength with a Brinell hardness not less than 285. At the shoulder the shaft is subjected to a completely reversed bending moment of 35 x 10° N.mm, accompanied by steady torsion of 22.5 x 10' N.mm.Surfaces are machined.See Answer**Q14:**1. A single horizontal force of 150 Ibf is applied to the end of lever ABC at C. AB has a diameter of1.2 inches and BC has a diameter of 0.75 inches. Determine the normal and shear stresses on an element located at point Q and having sidesparallel to the x and y axes. Draw an stress cube and show all applicable stresses on the positive faces. Label your axes. Determine the principal stresses and maximum shear stress and principal and shear planes. d. Sketch Mohr's circle for part C. See Answer**Q15:**(20%) A shaft, made of AISI 1050 CD steel, is loaded in bending and torsion such that Ma = 610 lbf · in, Ta= 375 lbf · in, Mm = 469 lbf · in, and Tm = 287 lbf · in. The shaft has a fully corrected endurance limit of Se = 30 kpsi and at the critical stress location, Kf= 2.3 and K= 1.9. Estimate the true fracture strength as being 50 k psi greater than the ultimate strength. The design factor is 2.5. Determine the minimum acceptable diameter of the shaft using the DE-Goodman criterion.See Answer**Q16:**7. (20%) The design load on a ball bearing is 413 lbf and an application factor of 1.2 is appropriate. The speed of the shaft is to be 300 rev/min, the life to be 30 kh with are liability of 0.99. What is the C10 catalog entry to be sought (or exceeded) when searching for a deep-groove bearing in a manufacturer's catalog on the basis of 106revolutions for rating life? The Weibull parameters are xo = 0.02, (0 – xo) = 4.439,and b = 1.483.See Answer**Q17:**Calculate the energy stored in a steel torsion bar spring such as that shown in Figure12.1a when one end of the bar angularly rotates 65° relative to the other end. The length of the torsion bar portion is 50 in., and the diameter is 0.312 in. Also, calculate the maximum shear stress. See Answer**Q18:**11-34 The figure shown is a geared counter shaft with an overhanging pinion at C. Select an angular contact bearing from Table 11-2 for mounting at O and an 02-series cylindrical roller bearing from Table11-3 for mounting at B. The force on gear A is FA = 600 Ibf, and the shaft is to run at a speed of 420rev/min. Solution of the statics problem gives force of bearings against the shaft at O as RO = -387j +467k Ibf, and at B as RB = 316j – 1615k Ibf. Specify the bearings required, using an application factor of1.2, a desired life of 40,000 hours, and a combined reliability goal of 0.95, assuming distribution data from manufacturer 2 in Table 11-6.See Answer**Q19:**11-26 An 02-series single-row deep-groove ball bearing is to be selected from table 11-2 for the following application conditions (I'll write them out there is a table in the book). Radial Load = 8 kN,Axial Load = 3 kN, Design Live = 108 rev, Ring rotating = Outer, Desired Reliability = 90%. Specify the smallest bore size from table 11-2 that can satisfy these conditions.See Answer**Q20:**3. (20 points) Design a plain surface bearing using the full-film hydro dynamically lubricated bearing approachable to carry 1500lb from a shaft having a diameter of2.5in and rotating at 1000rpm. Start with a nominal pressure of 240psi. Identify the required minimum lubricant viscosity, and calculate the friction torque (inIb in) and the frictional power loss (hp).See Answer

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