Mechanical Engineering question and answers for August 02, 2023
- Q In a annealing there are different stages, can explain thestages and show in a plot the ductility overtime
- Q discussion and conclusion for the thermal conductivity of solids Lab for the thermodynamics course
- Q The value of f depends on two independent variables x and y asdefined below:f(x,y)=x2+y2−x+3cos(x)sin(y)Function f has a minimum in the neighborhood of the origin (i.e.[0 0]). Find x and y...
- Q At approximately what temperature (in Kelvin) would a specimenof an alloy have to be carburized for 2.6 h to produce the samediffusion result as at 880°C for 13 h? Assume...
- Q Two samples of a low hardness steel were tested using a RockwellC hardness tester and the Rockwell B scale at the same lab on thesame day . The difference between...
- Q Q1. Explain the advantages and disadvantages of using the Zygoversus using the Mahr profilometer.Q2.Would you use the Zygo or the Mahr in an industrial settingand why?
- Q Below is a model response solution. Rewrite this solution in oneline using a correct notation that includes Heavisidefunctions.x(t) = e?2t sin(3.46t) t < 3sx(t) = e?2t sin(3.46t) + 0.2e?2(t?3) sin(3.46(t...
- Q An austenitized 70 mm diameter 4340 steel bar is quenched inagitated H2O. Predict what the Rockwell C hardness of the bar willbe at (a) its surface, (b) 3/4-R, (c) midway...
- Q Assuming the elastic solution for the stresses near a crack tipis valid in the case of small-scale yielding, determinerp(q) for Mode I and Mode IIÂ Â in plane stressand plane strain. Plot...
- Q For an ideal vapor-compression heat pump cycle, refrigerant 134ais used to provide 35 kW of heat to a building. Saturated vaporenters the compressor at 1.6 bar and saturated liquid exits...
- Q Thermodynamics1. The answer is -12.31 can someone please explain how we getthat.A pump steadily delivers 9.7 kg/s of water at the conditionsgiven below. Calculate the pump power (hp).The rate of...
- Q which type of gear material used for making a gear using injurk?
- Q which grade of steele example steel 304,316, 321,202, issuitable and easy drilled? PLZ give wright answer
- Q 1) A pump steadily delivers 15.9 kg/s of water at the conditionsgiven below. Calculate the pump power (kW).There is no heat transfer from the pump to the surroundings(i.e., adiabatic conditions).Pump...
- Q It is desired to air-condition a small one-room store located onthe first floor of a building several stories in height. The storeis 20' wide and 40' deep, and the ceiling...
- Q Air enters a nozzle steadily at P1=650kPa and T1=125°C at avelocity of 12m/s and leaves at 150m/s with a pressure of P2=110kPa and temperature of T2=78°C. If the inlet are...
- Q A 16​-lb weight stretches a spring 16 ft. The​ spring-masssystem is in a medium with a damping constant of 1.5 ​lb-sec/ft,and an external force given byf (t)= 3+e^-3t ​(in pounds)...
- Q 3) Air flows steadily at the rate of 0.4 kg/sthrough an air compressor, entering at 6 m/s with a pressure of 1bar and a specific volume of 0.85 m3/kg, and...
- Q An adiabatic air compressor with inlet conditions of 100 kPa, 27C and an exit pressure of 500 kPa has an inlet volume flow rate of5 m3/s and operates in steady...
- Q 1. Genichi Taguchi defined the taguchi loss Function: Explainwhat the Taguchi Loss Function means for both the consumer andManufacturer2. Boothroyd Dewhurst Manual Assembly: What do alpha a betadefine?3. Draw a...
- Q A steel cantilever member as shown below is subjected to atransverse load at its end that varies from 135 N to -45 N as axialload varies from 450 N to...
- Q 1.What are the distinctive features between a polyester andvinyl ester in terms of their properties.2.List five (5) general characteristics of fiber re-enforcedcomposites over their metal counterparts.please no hand writing.
- Q 1)Write the one-dimensional heat diffusion equation with thermalgeneration per unit volume and constant properties, assumingunsteady heat transfer.2)Consider two identical pin fins, however one of the pin fins hasa diameter which...
- Q Write a Matlab Code for the following:A co-op is paid a $15.00 hourly wage up to 20 hours per week. Inaddition, any hours over 20, the co-op collects an overtime...
- Q 5- What are differences in Brinell, Rockwell and Vicker hardnessmeasurements? Write your answer in a tabular form based upon typeof indenter(s) used, range of applied typical loads and type ofmaterial...
- Q Air enters an air conditioning unit at 32oC, 80% relativehumidity, and with a mass flowrate of 12 kg/min. It is to beconditioned to 25oC and 50% relative humidity. In order...
- Q What are the factors in determining your takeoff critical fieldlength for a certain runway? If after doing initial calculationsyou find the runway is too short, what might you be able...
- Q Problem Statement (Good luck…): Using Saint-Venant’s Principaland its importance to the analysis of stress acting on a volumeelement within a body and finite element theory, why is it“technically†incorrect and...
- Q The volume of 1 kg of helium in a piston-cylinder device isinitially 7 m3 . Now helium is compressed to 3 m3 while itspressure is maintained constant at 150 kPa....
- Q Steam, initially at 700 lbf/in.2, 550°F undergoes apolytropic process in a piston–cylinder assembly to a finalpressure of 2200 lbf/in.2 Kinetic and potential energyeffects are negligible.Determine the heat transfer, in Btu...
- Q A compression spring has a diameter of 0.67 in and a coildiameter of 0.067 in, with 30 total coils.The spring is to be made of unpeened HD A227 wire and...
- Q An insulated steel pipe carries hot water at 80 ºC. The outersurface of the insulation loses heat to the environment byconvection and radiation. For convection, assume hconv = 5.8W/m2.ºC. The...
- Q Consider the impact of compression of the air-fuel mixture onturbulence. Assume that an idealized turbulent eddy is representedby a gas disc 3 mm in diameter, d, and 0.5 mm thick,l,...
- Q Use the contact power theory to predict the maximum gas pressuredrop (in inches of water) across a scrubber which must be designedto achieve 97% efficiency. Given: Gas Flow rate =...
- Q Calculate the vapour pressures of n-hexane and n-decane above amixture at 25â—¦C containing 2% n-C6H14 +98% n-C10H22, by volume.Assume that the densities of pure n-hexane and n-decane are 660 and730kg/m3,...
- Q What is the difference between a two-wire and three-wire motorcontrol circuit?
- Q One method for reducing the pumping work in throttledspark-ignition engines is early intake valve closing (EIVC). WithEIVC, the inlet manifold is held at a pressure pi, which is higherthan the...
- Q 1. Where are stress concentration produced and what design andmanufacturing procedures reduce stress concentrations?2. How do ductile and brittle materials differ in their responseto tensile loads when a stress concentration...
- Q Give three different friction models or equations and examplesof when each is valid.
- Q MEMOFrom: The Boss of the comapanySubject: New Internet Cable Tension Machineinstallation IssueAction: Your recommendation with detailedanalysis and guidelines are required.HINT: The question is worded like a businessmanwould write to you....
- Q The face of a dam is vertical to a depth of 6m below the watersurface and then slopes at an angle of 30â—¦ to the vertical. If thedepth of the...
- Q Poiseuille flow describes laminar flow in a circular pipe. Thevelocity distribution in such flow has a parabolic form. Prove thatthe mean velocity is equal to one-half of the maximum velocity...
- Q What is the purpose of equipping a robot with a sensingsystem?2) What are the categories of photo-electric sensors? Defineeach category3) What are tactile sensors? Give example of how tactilesensors are...
- Q Refrigerant 134a enters a horizontal pipe operating at steadystate at 40°C, 300 kPa, and a velocity of 25 m/s. At the exit, thetemperature is 70°C and the pressure is 240...
- Q Problem 4.016 SI Refrigerant 134a enters a horizontal pipeoperating at steady state at 40°C, 300 kPa, and a velocity of 25m/s. At the exit, the temperature is 90°C and the...
- Q A pipe fitted with a closed valve connects two tanks. One tankcontains a 5kg mixture of 62.5 percent CO2 and 37.5 percent O2 on amole basis at 30C and 125kpa....
- Q whyshould you inspect a thermostat before installing it?
- Q Explain the significance of Charles Lindbergh's epic flight to the growth of aviation.
- Q Calculate the fatigue stress concentration for a steel filletedshaft that is loaded axially.Given Data:Sut = 690 MPaD (for larger cross-section) = 54 mmd (for smaller cross-section) = 40 mmr(fillet radius)...
- Q A vertical composite rod made up from a solid part connected inseries with a hollow partis fixed at its top end and has a collar attached at the lowerend.The following...
- Q Water at a mean temperature of 80 °C and a mean velocity of 0.15m/s flows inside a 2.5 cm ID and 3.3 cm OD, copper tube.Atmospheric air at 20 °C...
- Q A 50-tooth spur gear is in mesh with a 27-tooth pinion. Thegears have a diametral pitch of 5 teeth/in, and a pressure angle ofφ = 25°. The gears transmit 80...
- Q A pair of helical gears is used with the following properties:14.5 degree normal pressure angle, 45 degree helix angle, diametralpitch of 8 teeth/in, 1.5-in face width, and normal diametral pitchof...
- Q An AISI 1010 carbon steel plate of 1 by 1 m size and of 6 mmthickness is hung vertically after a heat treatment to 300°Cuniform temperature. It is cooled by...
- Q 5 t/hr of soybean oil is pumped through a smooth stainless steelpipe 5 cm in diameter at 30C.A) What will the coefficient of friction be?B) If by heating the oil...
- Q A transformer that is 10 cm long, 6.2 cm wide, and 5 cm high isto be cooled by attaching a 10 cm x 6.2 cm wide gold heat sink toits...
- Q Â I have to write a review paper of one measurement technique (any device you feel interested in or have experience with), which could be what I have learned in Mechanical...
- Q Describe the mathematical models of the boundary value problemto evaluate the elastic deflection of the beam based onEuler-Bernoulli and Timoshenko theories with finite differencediscretisation (for numerical integration and differentiation)
- Q Exhaust gases from a manufacturing plant are being dischargedthrough a 10-m-tall exhaust stack with outer diameter of 1.2 m. Theexhaust gases are discharged at a rate of 1.2 kg/s, whiletemperature...
- Q What is the piezoelectric effect. What is the reason? Whatapplications are there (Maximum 90 words)please with a good handwrite
- Q What is stress discontinuity?What is the difference between averaged and unaveragedstresses?What is the purpose of determining structural error?What is convergence as it is applied to the computation ofanalysis results?What is...
- Q Can you rewrite this MATLAB code using a for loop instead of awhile loop?%formattingclc, clear, format compact;%define variablesk=1;b=-2;x=-1;y=-2;%while loop initializationfor k <= 3disp([num2str(k), ' ',num2str(b),' ',num2str(x),'',num2str(y),]);y = x^2 -3;if y<...
- Q The machine repair model may often be used to approximate thebehavior of a computer’s CPU (central processing unit). Supposethat 20 terminals (assumed to always be busy) feed the CPU. Afterthe...
- Q Draw water and ammonia cycle in Einstein refrigerator, from tocondenser + generator, mark and name each component
- Q In 6 sentences discuss how should Kevin Clearing proceed at thispoint?Kevin Clearing is the engineering manager for the Verdant CountyRoad Commission (VCRC). VCRC has primary responsibility formaintaining the safety of...
- Q In a tensile test of an aluminum rod it has a calibrated length of 50.8 mm and a diameter of12.74 mm. A load of 3 180 kg and an...
- Q A 20ft x 20ft metal building has a steel roof that reaches atemperature of 140o F on a hot day. A cool front thenmoves in such that air at 60oF...
- Q An industrial process is using river water to cool105 kg/h of saturated steam in a heat exchanger at 0.1bar. The cooled steam exits the heat exchanger as a saturatedliquid at...
- Q Determine the required size (area, nominal diameter, and BarNo.) of the three reinforcing steel bars used in a 9 in. wide and12 in. deep concrete beam to assure the beam...
- Q Consider a single crystal of a cubic metal that is subjected toa tensile stress along the [0 1 2 ] direction.Calculate the Schmidt factor for the following slip systems. Ineach...
- Q 1.What is working progress for Design for cost? 2.What isworking progress for Design to cost?
- Q 1. What is Work process of Design for cost(DFC)? 2.What ischecklist for DFC? 3. How can we do Design for cost analysez? 4.What is work process of Design to cost(DTC)?...
- Q Water at 20°C flows up a vertical pipe of circular section andinternal diameter of 2 inches and height of 12 metres at avolumetric flow rate of 6.7 litres per second....
- Q What is the aluminum profile? What is themanufacturing method of aluminum profile? What are the materialsused in the manufacture of the product, describe in detail. Whatare the stages of the...
- Q A plane wall has thickness of 5 cm, thermal conductivity of 2W/mK and generates heat. The left face of the wall (x=0) has asurface temp. of 80C and has air...
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