Mechanical Engineering question and answers for July 18, 2023
- Q Refrigerant 134a is the working fluid in a vapor-compressionheat pump system with a heating capacity of 60,000 Btu/h. Thecondenser operates at 180 lbf/in.2, and the evaporatortemperature is 0°F. The refrigerant...
- Q the following plastic and composite processing techniquesexplain the two manufacturing processes: 1- extrusion 2- blowmolding.Note: sketches are required and your explanation should includediscussion about the process, tooling, products and materials.
- Q The fatigue life of a component is 5 x 105 cycles at200MPa and 2 x 105 cycles at 400MPa. If this componentis subjected to the loading sequence: 100 cycles at...
- Q Design a steam power plant that works as an ideal RegenerativeRankine cycle with 2 closed feedwater heaters cascaded backwards byselecting their extraction pressures to optimize cycle efficiency.The available steam conditions...
- Q Air enters a turbine operating at steady state at 10 bar, 1200 Kand expands to 0.8 bar. The turbine is well insulated, and kineticand potential energy effects can be neglected....
- Q A jet propulsion engine has an air that enter the compressor at100 kPa and 290K. The pressure ratio across the compressor is 14and the turbine inlet temperature is 1500K. When...
- Q Write a project which study steady state conduction in series/parallel configuration such as are used in conventionalresidential constryuction .This includes analysis of the walls,windows,doors and cieling .Also calculate energy saving...
- Q In an air standard Otto cycle, the maximum and minimumtemperatures are 1400 and 15?C. The heat supplied per kilogram ofair is 800 kJ. Calculate the compression ratio and the cycleefficiency....
- Q A four-cylinder petrol engine has a swept volume of 2000 cm3,and the clearance volume in each cylinder is 60 cm3. Calculate theair standard cycle efficiency. If the introduction conditions are...
- Q In a dual-combustion cycle, the maximum temperature is 2000 ?Cand the maximum pressure is 70 bar. Calculate the cycle efficiencyand the mean effective pressure when the pressure and temperatureat the...
- Q The engine of problem 10 is supplied with a mixture of gas andair in the proportion of 1 to 7 by volume. The estimated volumetricefficiency is 85 % and the...
- Q (a)Sketch and describe a hydraulic telemotor system(b) Explain it principle of operation
- Q define heat exchanger mechanical flow switch
- Q The upper end of a vertical steel wire 4mm diameter and 2,5 mlong is held securely. The other end is fixed central to a steelcylinder, 80 mm diameter and of...
- Q Describe the Rockwell hardness test. Include information on theindenter type, loading conditions and quantities measured.Describe how an Izod impact test of a polymer specimen isperformed. What does the test measure?
- Q estimate the microstructural properties (ferrite, pealite,bainite. martensite) from CCT tables. Estimated cooling time of2900 seconds with vickers hardness value of 286
- Q A 10-kg block A is released from rest 2 m above the 5-kg plateP, which can slide freely along the smooth vertical guides BC andDE. Determine the velocity of the...
- Q Describe how Aluminium can corrode or degradein AircraftFuselage.And methods for avoid degradation in Aircraft Fuselage.
- Q Describe how Aluminium can corrode or degradein AircraftFuselage.And methods for avoid degradation in Aircraft Fuselage.
- Q 1. Rocket motor cases may be fabricated as thin walled tubesfrom:a) Low alloy steel of proof stress 1200 MPa and GC =24 kJ/m measured in sheet of an appropriate thickness,...
- Q Q] What are the advantages and disadvantages of acceptancesampling over 100% inspection? Under what conditions shouldacceptance sampling be preferred over 100% inspection?Subject - Materials Management
- Q a) Advantages and Limitations FEAfor modal Analysisb) Advantages and Limitations ofExperimentak modal analysis
- Q 3. One mole of air is compressed isothermally at 300K from oneatmosphere to fifteen atmospheres.  a) Calculate the amount of work required in the compression.b) How much heat must be added...
- Q Liquid penetrant testing is a suitable method for almost anymaterial. What can not be inspected by liquid penetrant testingmethod? Explain why pre-cleaning is the most important step Imagine a part...
- Q A nozzle is is designed to achieve M=4 under expanded exit flowconditions. For the given total pressure and total temperature,calcuate:a) exit Machb)mach at which normal shock occurs in the model
- Q 13.3Â Â Â Â Why are clear objectivesand standards needed in the appraisal process?
- Q 13.2Â Â Â Â Why do supervisors appraisetheir employees? What in the process will benefit supervisors? Whatwill benefit their employees?
- Q In a surface condenser a section of the tubes near tothe air pump suction isscreened off so that the air is cooled to a temperature below thatof the condensate, separate...
- Q Why are the parts manufactured using powder metallurgy of nearnet shape? For mixtures of dissimilar metal powders, explain how(a) blending/mixing, and (b) compaction are carried out beforesintering. Explain how (i)...
- Q 15.3Â Â Â Â What does the Wagner Actprohibit?
- Q Define the phenomenon of Springback in sheetmetal forming, andprovide a detailed explanation of the methods used to compensatefor springback in finished sheetmetal products.
- Q What are the advantages of using an electric power steeringsystem?
- Q For each of the following pairs of polymers, plot and labelschematic stress-strain curves on the samegraph [i.e. make separate plots for parts (a), (b) and (c)].(a) Polychloroprene rubber having a...
- Q Consider a converging-diverging nozzle with an exit-to-throatarea of 3. The inlet reservoir pressure is 1 atm and the exitpressure is 0.5 atm.(a) For this pressure ratio a normal shock will...
- Q In a combined cycle of gas turbine, can a steam turbine drivethe same generator driven by the gas turbine? Or it must drives aseparate generator?Also, is there any gas power...
- Q A disk cam rotating at 200 rpm lifts a radial roller followerwith simple harmonic motion through a maximum displacement of 2.5in. while the cam rotates through 90°. There is then...
- Q How to calculate suitable spring rate for oscillating forcedclosed cam and follower having simple harmonic motion so that itwill always in contact with cam.Also at which speed it will losscontact...
- Q A steel rotor disc of uniform thickness 50mm has an outer rimdiameter 800mm and a central hole of diameter 150mm. There are 200blades each of weight 2N at an effective...
- Q Write an Matlab Program for Wankel EngineGemontry.State your and assumptions and post the code
- Q Describe how the arc weld is generated in the manual metal arc(MMA) welding process and discuss the mechanism of metal transferfrom the electrode to the weld pool. Also name and...
- Q Code an Entire Piston Design in MATLAB or C with thegiven input parameters areCrank Length , crank radius, crank angle , maximum explosionpressure (Pmax) , bore , strokeAssume any for...
- Q 14.5Â Â Â Â What are the major pitfallsa supervisor can fall victim to when carrying out disciplinaryfunctions?14.6Â Â Â Â What does it mean to befair when disciplining employees?14.7Â Â Â Â Why should you knowyourself and your...
- Q Write a program in MATLAB that processes a series of employeesto determine the days until/since a given employee’s birthday asfollows: To populate the employees' data, read in a comma separatedfile...
- Q Explain how the processing parameters for INJECTIONMOULDING can influence the tensile strength for agiven polymer, explain this in terms of polymer properties.
- Q Detailed methodology required in carry out experiment on theeffect of adulterated gasoline (gasoline + kerosene) on the sparkignition engine.
- Q 6. An increase in roughness of a pipe with laminar flow wouldincrease the pressure drop of the pipe. Assume the velocity is thesame for the smooth pipe and the rough...
- Q A large vented tank containing water at 20 C has a pipedischarging to the atmosphere horizontally from the bottom. Thepipe is 2.3 cm in diameter, has a surface roughness of...
- Q 2 kg/s of steam enters a turbine operating at steady state at 1MPa, 200oC and exits at 40oC with a quality of 83%. Stray heattransfer and kinetic and potential energy...
- Q Â It is required to select a compressor for a car manufacturing plant which uses Pneumatic tools and equipment 24 hours a day continuously. Therefore, following tasks are required:a. Research different...
- Q  It is required to select a ‘chemical feed pump’ to transport corrosive chemicals such as potassium permanganate, ferric chloride and fluosilicic acid. Therefore, following tasks are required:a) Research different pumps...
- Q explain why constant volume combustion gives a higher indicatedfuel conversion efficiency than constant pressure combustion forthe same compression ratio.
- Q Comparison between the four different materials(steel,copper,brass and Aluminum):a. Which material has the greatest tensile strength? How did youmeasure that?b.Which material has the highest yield strength?c. Which material the greatest modulus...
- Q Why is HTST better than LTLT? A juice product is needed to beheat processed to achieve 2 log reduction in microbial count. Itcould be accomplished by heating the juice product...
- Q Introduction: write about tensile test concept and it’simportant. (about 1 page)
- Q Ahorizontal tube of 53-mm outer diameter, with a surface temperatureof 34 degrees Celsius, is exposed to steam at 0.22 bar. Estimatethe condensation rate and heat transfer rate per unit length...
- Q Explain How fuel system components works:Booster pump-Jet Pump-Surge tank-Crossfeed valve-Jettison valve-Capcitance fuel gauge-
- Q Determine the Modulus of Elasticity (unit is in GPa) from analuminium specimen?Determine the 0.2% Proof Stress for aluminium (in MPa)?Calculate the Ultimate Tensile Strength (UTS) of aluminium.Given the maximum load...
- Q Millwrights in a factory need to suspend a machineweighting 10500ib from a beamhaving a span of 12.0 ft so that a truck can back under it. Assumethat the beam is...
- Q Discuss the requirements for each of the following componentsand discuss which of the processes you would choose to make theproduct. Please provide references where possible.1. Screwdriver.An example is shown below:Example:...
- Q Discuss the requirements for each of the following componentsand discuss which of the processes you would choose to make theproduct. Please provide references where possible.1. Bicycle Gears.An example is shown...
- Q Water at a flow rate of 20,000 kg/h will be heated from 20°C to35°C by hot water at 140°C. A 15°C hot water temperature drop isallowed. A number of 3.5...
- Q 3(a) What is the operating frequency of Zigbee and what is thewavelength?(b). Explain the data format for the Zigbee protocol.
- Q 9(a). How can a Zigbee based WSN avoid interferences fromanother Zigbee based sensor network in the same region?(b). How the power in expressed in decibel, and what are theapproximate power...
- Q Consider the parallel planes of infinite extent normal to thepage having opposite edges. The planes are in the environment ofTenv = 300 K as shownUsing the appropriate view factor relations...
- Q Q) List down the factors that should be considered whiledesigning a factory building? Will you prefer \"L\" shaped buildingover rectangular building for new plant? Why?
- Q Definition of Work, Energy,Power, and TorqueIn Gasoline Engine
- Q 1. an undulated surface that is designed to reduce friction byeliminating wear particles from the sliding interface. Theinterface is subjected to normal force N. The sliding speed is solow that...
- Q Flow measurement (rotameter)1. If a rotameter is not level, is the reading it provides toohigh or too low? Why?2. Why is it important to submerge the tubing end beforetaking the...
- Q Air flows through a 8-in-diameter, 60-ft-longadiabatic duct with inlet conditions of V1= 550 ft/s, T01=650 R, and P1= 50 psia. For an average friction factor of0.03, determine the velocity, temperature,...
- Q a) An open cycle gas turbine engine consists of a compressor, acombustion chamber and a two-stage turbine with a re-heater. Thegas enters the compressor at a temperature of 15 C....
- Q a. Explain the operation of thermodynamic systems i.e. opensystem and closed system with the aid of diagrams and examples.b. Define the term 'property of a substance' in a thermodynamicsystem and...
- Q Evaluate the polytropic process parameters bya. writing out the relationship between pressure and volumeb. deriving the expression for work flowc. relating polytropic index 'n' with different types ofprocesses in the...
- Q MERMED Inc. is a medical device manufacturer.The company’s headquarters is located in Houston, Texas. It is aglobal leader in developing, manufacturing, selling and servicingdiagnostic imaging and therapeutic medical devices used...
- Q Case Heavenly Chocolates Web Site Transactions .Heavenly Chocolates manufactures and sells quality chocolateproducts at its plant and retail store located in Saratoga Springs,New York. Two years ago, the company developed...
- Q Describe:-Different pressure fields to start the solution of the momentumequations for the computational process-The differences between correcting the velocities with avelocity potential versus pressure correction.-The different features associated with the...
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