The starting length of a shaft is 25.00 mm. This shaft is to be inserted into a hole in an expansion fit assembly operation. To be readily inserted, the shaft must be reduced in length by cooling. Determine the temperature to which the shaft must be reduced from room temperature (20° C) in order to reduce its length to 24.98 mm. Refer to the Table below.
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- A titanium shaft has a starting diameter = 19.50 mm. It is to be inserted into a hole in an expansion fit assembly operation. To be readily inserted, the shaft must be reduced in diameter by cooling. Determine the temperature to which the shaft must be reduced from room temperature (20 degree's C) in order to reduce its diameter to 19.48 mm. Use table 4.1 from the book for reference. Round to the nearest 10th of a Celcius.(a) The temperature at the surface of the heating rod, T1. (b) If the salt solution temperature is 300 degree Celcius, what is the value of convection heat transfer coefficient, h of the salt solution ? (c) If the heating rod is not covered by metallic cylinder and corresponds to the result of part (a) and (b), how much the rate of energy transfer to the salt solution ? (d) Compare and discuss the difference of heat transfer with and without the matallic cylinder."You did calculations using the simplified HAZ time-temperature formulas, assuming 3D heat flow, and are presenting your final internship conclusions to management. You realize with horror, in the middle of your presentation, that you forgot to label your calculated curves (below). Which curve is which? Pick the best answer A: "Plot 1 is HYPERFILL® and Plot 2 is p-GMAW. Since HYPERFILL® has the higher heat input, it cools more slowly." B: "Plot 2 is HYPERFILL® and Plot 1 is p-GMAW. Since HYPERFILL® has the faster travel speed of the two processes, it cools faster." C: "Plot 1 is p-GMAW and Plot 2 is HYPERFILL®. Since p-GMAW has the slower travel speed, it cools more slowly." D: "Plot 2 is p-GMAW and Plot 1 is HYPERFILL®. Since p-GMAW has the lower heat input, it cools faster" Both (A) and (D)
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- 2. In a free-moving piston-cylinder assembly with a pressure of 60 kPa and a temperature of -20°C100 grams of R-134a is initially retained. until the assembly temperature is 100°C.is heated. Calculate the volumetric change after heating.Q1. Imagine you are working for an automotive manufacturer and are selecting plastic materials for various components. Draw the structure of a material you might use for a soft touch plastic. Now draw the structure of a material you might use in the drive train (i.e., an engineering plastic). What characteristics are you engineering into the material? Q2. Based on what you know about the calorimetry of melting and crystallization, do you expect melting to be endothermic or exothermic? What about condensation? Can we say anything general about heat flow in the process of forming bonds, covalent or van der Waals?Presents the diagram of the problem, necessary formulas, clearance and numerical solution: The temperature of a silver bar increases by 10°C when it absorbs 1.23 kJ of heat. The mass of the bar is 525 g. Determine the specific heat of the bar.