Mechanical Engineering question and answers for July 14, 2023
- Q it is about plastic deformation and elastic deformationcan you explain annealed case and non-annealed case relation toworkhardening and elongation with stress- strain curveandthe reason although area decrease, force increase ,...
- Q Q. A hypothetical velocity field is given in CartesianCoordinates by: V? = 4z^2t i ? 4x k where i, j and k are the unitbase vectors. t is the time...
- Q What are the advantages and disadvantages of the PI controller,PD controller and PID controller ?NOTE: please write clearly or type it in a laptop or pcADVANCED DYNAMICS AND CONROL SYSTEMS
- Q methane gas CH4 enters a steady flow combustion chamber at 25oC and 1 atm and is burned with 40 percent excess air,which also enters at 25 oC and 1 atm....
- Q A plane wall is a composite of three materials, A, B and C. Thewall of material A has uniform heat generationqË™ of 100000 W/m3, kA= 75 W/m K, and thickness...
- Q Design 4 bevel gears for a shaft driven bicycle. Makeappropriate assumptions.
- Q A gas turbine receives 10 kg/s of helium and expands itpolytropically (n = 1.8) from 1100K and 600 kPa to 100 kPa.Determine the power produced, the entropy change of the...
- Q An adiabatic tank, 0.5 m3, is initially evacuated and chargedwith steam at 500 kPa and 300 C. The final tank pressure is 500kPa. Determine the final temperature and the entropyproduction.
- Q A gas turbine receives 10 kg/s of helium and expands itpolytropically (n = 1.8) from 1100K and 600 kPa to 100 kPa.Determine the power produced, the entropy change of the...
- Q in c++Write a function that takes a C string as an input parameter andreverses the string. The function should use two pointers, frontand rear. The front pointer should initially reference...
- Q in c++Write a function that takes a C string as an input parameter and reverses the string. The function should use two pointers, front and rear. The front pointer should...
- Q In c++Write a program that uses a DYNAMIC two-dimensional array to store the highest and lowest temperatures for each month of the year (temperature is a decimal value). The program...
- Q How do we use DSC and kinetics in composite improvements.
- Q (c) A titanium hip replacement ball joint of 23.000 mm diameterwas precision ground and required to be finished to a tolerance of+/- 0.002 mm The inspection procedure resulted in the...
- Q ** Re- differentiate clearly Nusselt theory forliquid film condensation along vertical surface.
- Q Using your knowledge of dislocations in crystalline materialssuch as metals, explain how solid solution strengthening worksusing diagrams
- Q Discussion #1: Business FormsChoose which business form (sole proprietorship, \"S\"Corporation, \"C\" Corporation, LLC, 501C3) you would use forone of the following businesses that you wouldlike to own if you could:Shoe...
- Q Why is it true that k>1 always, where k is the specific heatratio?
- Q Design a roller chain drive with the following data. Specify thechain size, the sizes and number of teeth in the sprockets, thenumber of chain pitches, the center distance, and the...
- Q why is pressure constant for the combustion process ofa diesel cycle?
- Q Compare and contrast the Thring sufficiency concept (section 6.5and figure 6.6 ) withthe Bellagio principles for sustainable development (section 6.6).List specific applica-tions of each approach to a particular energy issue...
- Q Instructions: Florida Power and Light (FPL) are seeking to addtwo more nuclear power plants on the current Homestead locationwhere two nuclear power plants already exist.FPL seeks two more South Florida...
- Q 1) A car is moving without slipping, it will have a point on itsbody that has zero velocity. True or False?2) When a wheel fixed at the center, rotates and...
- Q What is required for 2 processes (like heat and mass) tobe considered analogous?
- Q A power press makes steel pressings. The energy required foreach pressing is 5000J with each pressing taking 1s. The time takento remove the pressing and get the material ready for...
- Q 1) What is the difference of dynamic compressor(blowers) and normal compressor? Name 2 types of pump from eachcategory2 )Sketch and explain two types of blowers;Subject ( Application of Pneumatic and...
- Q If a gas is flowing at 300m/s and has a pressure and temperatureof 90kPa and20°C, find the maximum possible velocity that could be generated byexpansionof this gas if the gas...
- Q What is the function of the desiccant bag inside anaccumulator?
- Q Material A is generating heat at a rate of 11.25 x 10^3 W/m^3and is 40cm thick and has a thermal conductivity of 10 W/mK.Material B is 50 cm thick with...
- Q m
- Q What is an edge dislocation and how does it assist in theprocess of slip in a crystalline metal?
- Q Explain key reasons why using sandwich structures are beneficialcompared with the corresponding homogeneous structures. Give THREEapplications of sandwich structures.
- Q State how Mindlin Theory differs from Thin Plate Theory andsuggest an application.
- Q 1.        (a) Using a normal distribution,define what is meant by both “ machine†and “process†capabilityand explain the difference by providing three measures that areused in eachcase.                                                                   [8 marks](b) The following data...
- Q Derive the flexural rigidity of a sandwich beam whose breadth isb, which has a core of thickness c and skins of thickness t each.The distance between the centroids of the...
- Q Explain two reasons why plate structures affects significantlythe lightweight (i.e. ship hull, machinery, outfit and permanentequipment, etc) of a ship.
- Q 0.025 of moist air at 18°C dry-bulb and 10°c wet-bulbtemperatures mixes with 0.005 kg/s of air at 38°C and 29°cwet-bulb. What is the mixture dry-bulb temperature, humidity ratio,relative humidity, and...
- Q For the elastic body defined in Question 1 (below), define theboundary conditions in terms of displacement, assuming the boundarysurface at the point in question has direction cosines with respectto x...
- Q Based on experimentalobservations, the acceleration of a particle is defined by therelation a = –(0.1 + sin x/b), wherea and x are expressed in m/s2 andmeters, respectively. Know that b...
- Q Write down the equilibrium equations for a three-dimensionalisotropic material in terms of displacements. Assume that thematerial modulus of elasticity, Poisson ratio and density are, andthat the body forces are due...
- Q A gas turbine used for power generation is producing 57MW ofpower. The turbine’s exhaust temperature is 541°C at a mass flowrate of 132.8 kg/s and is currently emitted to the...
- Q A chicken house (20' x 10'x 8') with walls and roof with R-value= 5 hr oF ft2/BTU.There are 2 wooden doors ( 80†x 36â€) with an R-value of 2.5...
- Q 4. Explain with schematics the two-photonpolymerization technique. What is its advantage over stereolithography?
- Q A thin plate is suspended in air at 1 atm. with T_infinite=15°C. Air flows on both sides of the plate where the bottom sideabsorbs a uniform radiative heat flux of...
- Q This is the Matlab practice so needs Matlab code2. Numerical IntegrationConsider an industrial tank in the shape of an inverted cone. Theradius of the tank at the top rim is...
- Q How would you put the alloy HR15 in the heat treatmentsolution?
- Q A soft-drink bottler purchases nonreturnable glass bottles froma supplier. The lower specification on bursting strength in thebottles is 225 psi. The bottler wishes to use variables sampling tosentence the lots...
- Q A 70% Cu–30% Zn brass wire is cold-drawn 15 percent to adiameter of 4.53 mm. The wire is then further cold-drawn to adiameter of 3.98 mm. (a) Calculate the total...
- Q Assume that you are appointed by a university as the technicalmanager of the University's Formula-SAE-A Race Car project and youare required to:a) Identify the relationships between operational objectives andfunctional requirements...
- Q Explain the meaning of the following threads markin??M20*2-6H/6gM20*2left-6H/5g6gM16*Ph 3P1.5-6HM16*Ph 3P1.5(two starts)-6HM8*1-LH
- Q Boxes use to ship the components, must have square bases inorder or attached square labels to each end. The labels may havestandard hazard warnings or handling information. The labels,however, can...
- Q The 12 cylinder 2 stroke cycle compression ignition engine of anoil tanker is operating at 150 rpm The brake mean effectivepressure of the engine is 400 kPa and the excess...
- Q Steam is contained in a 4-liter volume at a pressure of 1.5 MPaand a temperature of 200°C. If the pressure is held constant byexpanding the volume while 40 kJ of...
- Q Describe How hot wire anemometer is calibrated?
- Q a gas turbine power plant operating on brayton cycle with a fuelcompressor isentropic efficiency of 80 and turbine isentropicefficiency of 85 percent and it has a pressure ratio of rp....
- Q Considering the three classes of response of materials tochanges in temperature, explain why it is a sudden change ratherthan an accelerating or gradual change that is important for theoperation of...
- Q  (a) Dry saturated steam at a temperature of 180ºC is to be produced in a fire tube boiler from the cooling of 50 000 kg h–1 of flue gases from...
- Q Small high-swirl direct-injection CI engines have fuelconversion efficiencies which are about 10 percent higher thanvalues typical of equivalent indirect-injection engines. (ID1engines are used because they achieve higher bmep.) Whatcombustion-system-related differences...
- Q 2. Write a program which reads in the text file generated inpart one and writes out the same data as a comma-separated values(CSV) file for further processing.The file should have...
- Q You are required to develop a computer code that that can solvesystems of ODE. The code should request the user to choose one ofthe following methods for solving the system:?...
- Q % Consider the following system of equations:% -2a +5b + c + 3d + 4e - f = 0% 2a - b - 5c - 2d + 6e + 4f...
- Q Explain how the use of glass walls gives rise to heating in agreenhouse. Be brief.
- Q How Die-tools are traditionally manufactured.(should cover following information and no more than 300words for each method) Your discussion in this sectionshould include the following information regarding.1. how method creates die...
- Q Moist air enters an adiabatic humidifier system at 1 atm, 15 °C,with a relative humidity of 20%. The volumetric flow rate of theincoming moist air is 150 m3/min. Saturated water...
- Q The rotor of a kaplan turbine is 2.8m in dia. at theblade tips and 0.9m at the hub. Its speed of rotation is 110r/min.Water enters the rotor without shock, making...
- Q A hydro power station is required to deliver 48MW ofpower to the national grid from a site where the available head is16m The alternator efficiency may be taken as 96%.The...
- Q QUESTION 2Study a manufacturing or industrial process of yourchoice.2.1 Report on the level of automation and various actuatorsused giving justification. (10)2.2 Identify processes where adaptive, feedforward andregulatory control are used....
- Q Obtain manufacturers’ data on thermocouple and thermistortemperature sensors for measuring temperatures of hot combustiongases from a furnace. Explain the basic operating principles ofeach sensor and compare the advantages and disadvantages...
- Q Does the force of compaction in powder metallurgy affect final part properties? How?Â
- Q For water in state 1.5 bar, 225 C, what is the specific internalenergy of water (kJ/kg)?
- Q Bolt Fastener Design:Calculate the fastener and bolt stiffness and required lengthfor a M14x2 hex head bolt and nut used to assemble two 16mm steelplates
- Q A reaction turbine whose runner radii are r1 =300 mm,r2 = 150 mm, operates under the following conditions; Q= 2.3 m3/s, w = 25 rad/s, α1 = 26 0 ,...
- Q The design condition for a space is 77 F (25 C) db and 50percent relative humidity with 55 F (13 C) db supply air at 90percent relative humidity A 50-ton,...
- Q A compound tube is formed by shrinking together two tubes withcommon radius 150 mm and thickness 25 mm. The shrinkage allowanceis to be such that when an internal pressure of...
- Q Why do we use angled drafts in casting
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