Mechanical Engineering question and answers for July 25, 2023
- Q The critical dimension on a machined hole must be 0.5025 in. Themachining process can reliably create holes with a known standarddeviation of 0.005 in. A random sample of 15 holes...
- Q A simple Rankine cycle is operating between the 12.5 MPa on thehigh pressure side and 9.93 kPa on the low pressure side. Thetemperature entering the turbine is 550 degrees Celsius....
- Q A.How to manufacture ceramics of complicated dimension features(i.e., cellular, porous, scaffold) since they cannot be machined orcut?B. How to print metal materials at room temperature? (openquestions, think about phase diagram...
- Q This question related to thermodynamics.With a throtteling valve in a refrigiration system h1= h2.  If h1 = h2 and only pressure is changed bya throttling valve then why can't an ideal...
- Q I had to teardown a stapler and figure out how all the part wortogether, bit cant seem to get how it all works together , likeinvolving the sprngs and everything.this...
- Q One-quarter kilogram of air is compressed in a piston-cylinderdevice from 350 K and 150 kPa to 550 K and 900 kPa. Determinea. The entropy change, in KJ/K.b. The direction of...
- Q The tow hitch is held in place by a retaining pin that isdesigned to fail before the fasteners between the tow package andthe vehicle frame fail. The tow package is...
- Q Quenching is often used in the manufacturing and/or heattreatment of magnesium alloys, aluminium alloysand steels.Explain why quenching is used for each of thesethree metals, and explain how this benefits the...
- Q how to calculate forces on cam and follower at various cam speedand angle.Cam and follower with SHM motion.What are the formulaavailable
- Q It is proposed that a model study be carried out on a proposallow-speed airfoil that is to fly at low altitudes at a speed of 50m/s. If a 1:10 scale...
- Q In regards to the metal extrusion manufacturing process:1. How would you ensure that you obtained afine-grained microstructure in a metal casting?Carefully explain the mechanism/s that lead to the fine grainsize.
- Q Outside air at 10 degC, 1 bar and 40% relative humidity entersan air conditioner operating at steady state with a mass flow rateof 1.5kg/s. The air is first heated at...
- Q Materials Engineering QuestionSuggest the optimal heat treatment and condition for 0.45 wt.%steel required, to produce what you consider to be the bestcombination of properties for a “Chef’s Knifeâ€. Explain your...
- Q Friction is extremely difficult to control. If excessivelyregulated, leads to exhaustive wear, while if loosely regulated,leads to ineffective maneuvers. As a mechanical engineer, you areto design a web handling device...
- Q Discuss the sensitivity of modulus to shear correction factorand span to depth ratio in a short beam shear and flexure lab
- Q Water at 0.15 MPa if the water is 0.25% between liquid and vaporwhat is the specific volume, Energy, Enthalpy and Entropy?
- Q A large Factory space has an average occupancy of 45 people(only male workers in this space) they are doing light bench work.The average light level is 1.5W/ft2 of recessed, ventedto...
- Q If a tank with water level H springs a small leak at the bottom,what will be the flow velocity?
- Q 1. Crude oil flows through an uphill section of the Keystonepipeline at a rate of 2.94 m3 /s (equivalent to 1.6 million barrelsof day). The average elevation gain in the...
- Q A beam of light hits a 2.36cm thick silicate glass plate at anangle of 64 degrees (as measured from the normal to the surface ofthe glass). If the coefficient of...
- Q Develop a computer program or spread sheet to calculate, for agiven day and location, the hourly-changed total solar radiationonto a southeast-facing vertical wall and a flat-roof where solarpanels are located....
- Q 1.A common difference between proscenia and masking is …1.Proscenia is permanent and masking is usually semi permanent2.Proscenia is semi permanent and masking is usually permanent3.Proscenia and masking as just two...
- Q Find the length of a 0.5 in. schedule 40 pipe required to heatwater from 60 deg. f to 160 deg. f using condended steam at 260 degf given water flowing...
- Q Assume you have a subsystem with a failure rate of .00002failures/hour. At least one such subsystem must work for the systemto be functional. You can use up to 2 such...
- Q A small quantity of n-octane is placed in a wide test tube at 20degrees C and two capillaries are inserted vertically and immersedto the same depth. The radii of the...
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