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FROM BOOK: ENGINEERING THERMOFLUIDS, M. MASSOUD
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- 400 300 200 100 Al R 10 17.1 20 36.1 30 59.8 66.7 40 50 60 Weight percentage, magnesium Al-Mg phase diagram 70 437 80 87.4 90 Mg What is the maximum solubility, in wt% , for Mg in y? (Give your answer as a number only to 1 decimal place)2. The results from a settling column test performed on a municipal sewage from a certain town were as presented below. The experiments were conducted on a sample of sewage which is sieved through a 1.2 mm mesh to remove gross solids that would block valves. 501 of the sample weighed 1.352 gm. After drying. Sampling Time (min.) 0 60 180 360 Experimental results for amount of SS remaining in the sample (mg/l) Sampling depth (cm) 100 230 150 118 90 200 230 150 143 115 300 230 159 147 134 400 230 157 152 145 The sewage treatment work incorporates two primary settlement tanks each of a diameter of 25 m. The sewage flow to the tanks is 0.3 m³/s. Find the percentage expected SS removal at the works.eier voij 1) Two aggregates (Al and A2) were obtained from the field. A sieve analysis was pertormed on each sample, and the samples (originally 500g in mass) were brought to the oven dry condition (OD) and weighed. Data was obtained for each of the aggregates and is presented in the tables below. (Density of water=1g/cm') Table 1. Results from sieve analysis. Sieve Size Opening (mm) Weight of Aggregate retained (g) A1 A2 3/8" 9.5 No. 4 4.75 65 No. 8 2.36 60 25 No. 16 1.18 100 396 No. 30 0.6 50 No. 50 0.3 118.5 10 No. 100 0.15 75 15 Pan 75 Table 2. Absorption capacity and moisture content data. A2 500 g 496 g A1 Field Weight |Oven Dry Weight Absorption Capacity (%) | 0.7 % 500 g 498.5 g 0.6 % a) Plot the grading curve for each aggregate (x-axis: sieve opening, y-axis: %passing). (Note: In the grading curves, you must show all data points. You can draw the gradation chart using excel or by hand. If you draw by hand, you have to use a ruler. The format of the gradation chart should be…
- Problem 3: Insulation To=1 Toowwww Steam Tx2 T₂ T3 www www R₁ R₁ R₂ www.T R₂ Steam at T1 = 320 °C flows in a cast iron pipe (k= 80 W/m. °C) whose inner and outer diameters are 5 cm = 0.05 m and D₂ = 5.5 cm = 0.055 m, respectively. The pipe is covered with 3-cm-thick glass wool insulation with k = 0.05 W/m. °C. Heat is lost to surroundings at T2 = 5 °C by natural convection and radiation, with a combined heat transfer coefficient of h₂ = 18 W/m². °C. Taking the heat transfer coefficient inside the pipe to be h₁ = 60 W/m². °C, determine the temperature drops across the pipe and the insulation. The determination is based on a unit length of the pipe (L = 1 m). Assumptions 1. Heat transfer is one-dimensional since there is no indication of any change with time. 2. Heat transfer is one-dimensional since there is thermal symmetry about the centreline and no variation in the axial direction. 3. Thermal conductivities are constant. 4. The thermal contact resistant at the interface is…Mechanical Engineering The fatigue strength limit Sn (n = 106) of a steel part is 112 MPa and its ultimate tensile strength (Sy) is 385MPa. Adopting Ct = 1, and S103 = 0.9 * Su* Ct, determine: (Use two decimal places in the answers), (* is multiplication signal): a) The fatigue strength (in MPa) corresponding to a life of 40000 cycles. b) The average life in cycles that this part would last if subjected to an alternating stress of 170 MPa due to bending.1.5 Consider a shale-free, dry, sandstone core plug. By measure- ment, the following data are known: d=2.54 cm, L=5.00 cm, and mass (dry)=54.8 g. a. Knowing that the grain density of most sandstones is about 2.65 g/cm³, estimate the porosity of the core plug. b. The plug is completely saturated with 145,000-ppm NaCl brine whose specific gravity is 1.1. The mass of the satu- rated core plug is now 60.38 g. Calculate the porosity of the plug. c. Estimate the end-to-end resistance of the saturated core plug in 2 at 80°F.
- Convert 22C to Fahrenheit.• Temperature plot scoped to steam pipe (cast iron) in C° units. Fill in the below table. Compute the temperature drop up to THREE decimal places (see hint given below). Temp drop in Insulator Temp drop in Pipe ANSYS Results • Include the above table in your submission.2. Please use 3 sig fig only for answer. 57.93 and 57 are wrong answers for the second problem
- Problem 3: Insulation To=1 Toowwww Steam Tx2 T₂ T3 www www R₁ R₁ R₂ www.T R₂ Steam at Tx1 = 320 °C flows in a cast iron pipe (k = 80 W/m. °C) whose inner and outer diameters are 5 cm = 0.05 m and D₂ = 5.5 cm = 0.055 m, respectively. The pipe is covered with 3-cm-thick glass wool insulation with k = 0.05 W/m. °C. Heat is lost to surroundings at T2 = 5 °C by natural convection and radiation, with a combined heat transfer coefficient of h₂ = 18 W/m². °C. Taking the heat transfer coefficient inside the pipe to be h₁ = 60 W/m². °C, determine the temperature drops across the pipe and the insulation. The determination is based on a unit length of the pipe (L = 1 m). Assumptions 1. Heat transfer is one-dimensional since there is no indication of any change with time. 2. Heat transfer is one-dimensional since there is thermal symmetry about the centreline and no variation in the axial direction. 3. Thermal conductivities are constant. 4. The thermal contact resistant at the interface is…2. In an automobile planttwo tasks are performed by robots. The first entails welding two joints; the second, tighteningthree bolts. Let X denote the number of defective welds and Y the number of improperly tightened bolts produce per car. Table 1: x/y 2 3 .840 .030 .020 .010 1 .060 .010 .008 .002 2 .010 .005 .004 .001 Use table 1 to find each of these probabilit ies, The probabilitythat exactly two defective welds and one improperlytightened bolt will be produced by the robots. b. The probability that at least one defective weld and at least one improperlytightened bolt will be produced. The probability that at most one defective weld will be produced. C.Distilled water at 10deg C stands in a glass tube of 9.0 mm diameter at a height of 24.00 mm. What is the true static height in mm if the surface tesnsion is 0.0742 N/m. a.24 mm b.27.4 mm c.20.6 mm d.3.4 mm