Mechanical Engineering question and answers for July 02, 2023
- Q Why do materials fail at lower loads if stress is cyclic?Describe fatigue mechanisms for alloys with pre-crackedstructures.
- Q Air undergoes a polytropic process in a piston–cylinder assemblyfrom p1 = 1 bar, T1 = 295 Kto p2 = 3 bar. The air is modeled as an idealgas and kinetic...
- Q FIreclay brick (Ï=2050 kg/m3, cp=960 J/kg-K, k=1.1 W/m-K) withdimensions 0.06 m x 0.09 m x 0.20 m is removed from a kiln at 1600Kand cooled in air at 40C with...
- Q a simple ideal Brayton cycle with air as the working fluid has apressure ratio of 10. The air enters the compressor at 520 R andthe turbine at 2000 R. Accounting...
- Q Define the system, control volume, and control surface for a4-foot, 6-inch diameter section of pipe. Is the system Lagrangianor Eulerian? Why?
- Q What is the General Equation? Explain the variables and parts ofthe equation. How is the GEneral Energy Equation applies to WaterPUmps?
- Q 4.The Indiana Highway Department wants to construct a new ruralhighway. The engineering team is considering two designs:a. Design A calls for a concrete pavement costing $90/ft. witha 20-year life, two...
- Q Case “EXCESSâ€Â    Stephanie Simon knew environmentalmanager Adam Baines would not be pleased with her report on thechemical spill. The data clearly indicated that the spill was largeenough that regulations required...
- Q What are the types of solar heating systems ?
- Q Top fuel dragsters (right) as the quickest accelerating cars inthe world, and the fastest competitors reach speeds of 335mph,completing a 1000ft run in just 3.64s. The 0 to 100mph time...
- Q Describe conditions for a self-sustaining plasma
- Q An orthogonal cutting operation is being conducted with thefollowing parameters: width of cut=1mm; depth of cut = 0.1mm; shear stress =120 MPa; andcoefficient of friction, μ=0.9.a) Generate a smooth plot...
- Q Describe the issues of thin filmstresses.
- Q A flying wing has a planform area of 3700 ft2, a rootchord at the airplane centerline of 34 ft, an overall taper ratioof 0.275, and a span of 170 ft....
- Q A new material has a measured thermal conductivity k of 200BTU-in/hr-ft2 -°F. Is this material a thermal insulator or aconductor? Calculate the R and U values for a block of...
- Q Take a picture of frame or machine. You mustphysically see it--no internet pictures. Explain why it should becategorized as a frame or a machine. Justify your case using thedefinitions of...
- Q 9.43 An ideal air-standardstate with compressor inlet conditions of 300 K and 100 kPa and afixed turbine inlet temperature of 1700 K. For the cycle,Plot the net work developed per...
- Q 1.Describe the differences, if any, between laminar andturbulent boundary layers.2.Describe the different sub-layers required to model turbulentboundary layers.3.Discuss the reason(s) for a similar pattern between wall shearstress and heat transfer...
- Q Question From Solar Technologies....#1)Â Â From system engineering standpoint, describe waysas to how the hot air from a solar collector can be used inbuildings.#2) Use the data provided in example 3.15 (pp....
- Q Rank the following microstructures of steel in terms of theirrelative ductility, assuming they each feature the same overallcomposition and, as applicable, the same fractions of the phasespresent.1 = highest ductility6...
- Q Give a metallurgical explanation of what a person would beobtaining if they ordered a product by the descriptive name. Ametallurgical explanation would be based on the chemicalcomposition, the expected phases...
- Q A system consists of 2 kg of carbon dioxide gas initially atstate 1, where p1 = 1 bar,T1 = 300 K. The system undergoes a power cycleconsisting of the following...
- Q Choose an ethics case study which occurred in the last 7 years.Write a 1-2 page, paper addressing the following:• Briefly describe the event• Discuss the ethical issues /cite specific codes...
- Q A Rankine cycle power plant is being developed to operate anirrigation system. In this powerplant solar energy will be used to boil a low boiling point fluidwithin glazed flat plate...
- Q pros and cons of usinga drain rooter with live image with handheld screen or using adrain rooter device with smartphone.
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