Mechanical Engineering question and answers for August 04, 2023
- Q Consider a circular air duct (no insulation) with a constantdiameter of 10 cm and length of 1 m. The inlet condition is 40 degC and 20 m/s. The wall of...
- Q The mass balance for a control volume can be defined as anychange of mass within the control volume is equal to the net gainof mass flowing into the volume through...
- Q Identify the correct statement in the context of forcedconvection. (Check all that apply.)A) Natural convection enhances forcedconvection heat transfer in transverse flow.B) Natural convection hurts forcedconvection heat transfer in transverse...
- Q A thin-walled cylinder gets 200 kN axial compressive force and 3kNm torque moment simultaneously. The diameter of the cylinder is300 mm and the cylinder wall thickness is 3 mm. Determine...
- Q Describe the use of Destructive and Non-Destructive Analyses andContainment and Surveillance in the context of safeguards. Comparethe different approaches and describe the benefits and shortcomingsof each.
- Q Q7 : A cascade refrigeration system is designed to supply 10tonnes of refrigeration at an evaporator temperature of -40°C and acondenser temperature of 36°C. The load at -40°C is absorbed...
- Q Consider a centrifugal water pump whose geometry and flowconditions are as follows: Impeller outlet radius – 2.5 cm,impeller inlet radius – 1.8 cm, impeller outlet width – 1 cm,design speed...
- Q A gas refrigeration cycle with a pressure ratio of 4.3 useshelium as the working fluid. The temperature of the helium is 26°Cat the compressor inlet and 50°C at the turbine...
- Q A piston-cylinder device, whose piston is resting on a set ofstops, initially contains 2 kg of air at 300 kPa and 27ºC. The massof the piston is such that a...
- Q Your objective for this project is todo an Internet-based literature search and describe in detail, themethods/processes used by GE to design and develop green products,sustainable production processes, and implement its...
- Q Q1: What are the criteria by which machinability is commonlyassessed in a production machining operation? Explain thedifference between roughing and finishing operations in machining.What is the difference between peripheral milling...
- Q A venturimeter is placed in a pipe which is at 30 degrees to thehorizontal. The pipe carries gasoline of specific gravity 0.8. Thediameter at inlet and throat diameter are 5cm...
- Q Example 3.7: A commercial steel piping system is deliveringwater at 30°C from pressurized tank A to pressurised tank B asshown in figure below. The internal diameter of the pipe is...
- Q 1. Use Laplace transforms to solve the following differentialequations for ?(?) for ? ≥ 0. Use ?(0) = 0 and ?̇(0) = 1 for eachcase.i. 0 = ?̈(?) + 2?̇(?)...
- Q Design a system that shows a simplified automatic car washsystem with the following operating conditions:- Water level needs to be maintained at water level (>Lower limit and < Upper limit...
- Q Â Q1/ Answer the following:1. What is the main advantage of direct acting thermostats?2. What is the purpose of using a capacitor in a two-phase reversible induction motor?3. What does the...
- Q Air enters a compressor operating at steady state with apressure of 14.7 lbf/in.2, a temperature of 70°F, and a volumetricflow rate of 500 ft3/min. The air velocity in the exit...
- Q . On the Structures, Strengthening, and Heat Treatment of metalalloys:A. Explain the role of the solute and solvent of a solidsolution?Explain five heat-treatment methods used for metal andalloys?
- Q Iwas assigned to find at least two problems/ failures for a tvstand, and provide at least two solutions to the failures by makinga new design. Anyone knows or has any...
- Q - What materials are ( or can be ) used for adhesives?( general families)- What kind of \"triggers\" are used to cause the \"curing\" of somepolymer adhesives?- What geometries are...
- Q 1. What often happens to safety issues during unionnegotiations?2. Who is allowed to accompany an OSHA inspector during an OSHAinspection?3. What are the two types of variances and when might...
- Q One method for reducing the pumping work in throttledspark-ignition engines is early intake valve closing(EIVC). With EIVC, the inlet manifold is held at a pressurepi, which is higher than the...
- Q what are the things to do before, during,after   operation of mechanical rice transplanter (walk behind type)
- Q It is desired to produce liquefied natural gas (LNG), which weconsider to be pure methane, from that gas at 1 bar and 280 K(conditions “1†in the Linde process of...
- Q Using your understanding of how plastic deformation occurs,explain briefly each of the following ways to strengthen metallicmaterialsa. strain strengthening (work hardening)b. alloy strengtheningc. grain boundary strengthening
- Q Compare the bending moment diagrams of the indeterminate andsimply supported beams. What are the advantages of usingindeterminate beams? Why are thereactions different from those ofthe simply suppored beam with similar...
- Q A regenerative gas-turbine power plant with two stages ofcompression and two stages of expansion operates on a Brayton cyclewith a pressure ratio across the two-stage compressor of 12. Airenters the...
- Q Define a matrix of 12 conditions (ej: flight conditions,atmospheric conditions etc) for a J73 turbojet Engine.
- Q Howcould we measure linear position, and angular position. Identify anappropiate sensor to connect to the Siemens PLC S7-1214DCDCDC
- Q What is the answer to this question?Imagine if an artificial cartilage is fully made of chondrocyteswhich has a compression modulus 0.41 KPa and apparent viscosity of3.0 KPa.s.a) If such a...
- Q Problem 2: Plot the LST (y?axis) correspondingto 10:00 AM versus months (x?axis) (consider the 21st day of eachmonth as the representative of each month) for Panama City Bay,Florida. Â
- Q What is the best way to reduce the average grain size in a metalspeciman.
- Q A thick steel slab (Ï= 7800 kg/m3, c= 480 J/kg·K, k=50 W/m·K) is initially at 300°C and is cooled by water jetsimpinging on one of its surfaces. The temperature of...
- Q 1- The interdependence between materials and their __________must also be recognized.a.environment         b. processing         c. structure   d. properties2-The design process primarily consists of design, prototype,and __________ stages.a. production         b. selection         c. quality      d. structure3- Approaches...
- Q Complete the followingprogram so that C = A*B where A and B are the matrices definedbelow.N=4;M=3;A=rand(M,N);B=rand(N,M);C = ?for m = 1: MÂ Â for n = 1: ?for p = 1...
- Q An insulated pump receives liquid engine oil (density Ï = 55lbm/ft3 , specific heat c = 0.442 Btu/lbm-R) at 75 oF and 15 psia,and exhausts the oil at 3000 psia...
- Q What are some of the common decision-making errors thatteams and groups encounter?
- Q step by step solution on how to create Index Slide insolidworks
- Q The air in a room has a pressure of 1 atm, a dry-bulbtemperature of 24°C, and a wetbulb temperature of 17°C. Using thepsychrometric chart, determine(a) The specific humidity,(b) The enthalpy,...
- Q Air enters a steady-flow turbine. The conditions of the airentering and leaving theturbine are as follows: inlet, 300 kPa and 52°C; exit, 100 kPaand 12°C. The massflow rate is 10...
- Q In large steam power plants, the feedwater is frequently heatedin closed feedwater heaters (basically heat exchangers) by steamextracted from the turbine at some stage. Steam enters thefeedwater heater at 1.5...
- Q Joe Bruin has a big lawn in front of his house that is 30 meterswide and 20 meters long. Josephine makes him go out and mow thegrass every weekend, so...
- Q §Take any two sectors (cement/ automobiles/ oil/ bottleddrinking water, garments/ furniture/ refrigerators, etc) and drawtheir distribution/supply networks.§ Comment on their supply chain uncertainty§ Identify 4 or more supply chain metrics...
- Q (Torsion Expirement) strenght of materials (+200 words)Describe the behavior of the material as it respond toincreasing load. Pay special attention tot the region above theyield where linerar elastic theory no...
- Q Can you describe a physical life phenomena (not from yourresearch – but you realize in your day to day life) which needsflux integral and concurrently the divergence theorem.
- Q MCQ : Compressible flowNitrogen is escaping from a pressurized bottle (internaltemperature 300 K, internal pressure 650 kPa) through an open valvethat happens to be shaped like a converging-diverging nozzle, withan...
- Q MATLAB 2017bThe trajectory of a projectile is given by:Write a program which will draw thetrajectory for seconds. Make sure to label, title and grid yourgraph.
- Q Please list and discuss 5 translational opportunities based onthe research in designing football helmets to be safe and minimalbrain impact injury.
- Q What is the advantages and disadvantages of stress strain curve.Please solve it in easy way, clear writing so I can understandit.
- Q What are some ways that professional collaborations can bemanaged to reduce the possibility of research misconduct?
- Q Determine the critical resolved shear stress for an iron crystalwhich deforms by simultaneous slip on (110) [111], (110) [111],(110)[111], and (110) [111] when the tensile stress along [010] is95.2 MPa....
- Q Fluid Mechanics question:Describe the processes in a wind turbine from a) the perspectiveof a system and b) from the perspective of a control system
- Q One method in which gear tooth interference can be avoided is tolengthen the pinion teeth and shorten the gear teeth. A 12 toothpinion with a diametral pitch of 2 teeth/in...
- Q What does Lean Manufacturing try to accomplish? How? Why? Where?When? What message don’t we want Lean to represent, Why? Why isvisual management so important? Provide 3 examples from yourpersonal experiences...
- Q Things never seem to slow down, particularly on your existingsubsea project. While all this activity is going on with the newoil zones, SIT issues, you and your team have to...
- Q Develop a transient numerical model for the Trombe wall,
- Q Strain gauges are placed at two locations on a wing that isbeing tested in a wind tunnel. The first gauge is near the fixedbase of the wing and the other...
- Q 1. A premixed stoichiometric methane-air flame has a laminarflame speed of 0.33 m/s and a temperature of 2200 K. The reactantsare initially at 300 K and 1 atm. Find the...
- Q 1. A premixed stoichiometric methane-air flame has a laminarflame speed of 0.33 m/s and a temperature of 2200 K. The reactantsare initially at 300 K and 1 atm. Find the...
- Q 1. The material removal rate of EDM process increaseswith (select all that apply):a.Decrease in the melting temperature of the workpiece material,Tmb.Increase in the discharge current, Ic.Voltaged.Increase in the melting temperature...
- Q What is Standard Work? What are the benefits of a one-piece flowversus batch manufacturing? What examples have you seen which areeither good or bad examples of Standard Work? If bad,...
- Q What is Standard Work? What are the benefits of a one-piece flowversus batch manufacturing? What examples have you seen which areeither good or bad examples of Standard Work? If bad,...
- Q Your scenario: You are a member a small engineering firm with astaff of 8. Your team meets every Wednesday morning for a meetingto review projects and activities.Engineers provide updates onprojects...
- Q Fundamentals of Engineering Thermodynamics By Michael J.Moran8th edition5.83)Two kilograms of air within a piston-cylinder assemblyexecute a Carnot power cycle with maximum and minimum temperaturesof 750 K and 300 K, respectively....
- Q Determine the temperature rise in the specimen for each case inProblem 6.75 (Open-die forging of a cylindrical, annealed copperspecimen 10 mm high and 25 mm in diameter, up to a...
- Q 3) Derive the matrix equation used to solve for the coefficientsfor least-squares polynomial regression for a quadratic model.4) Derive the matrix equation used to solve for the coefficientsfor least-squares multiple...
- Q break down of the system in sub system?when we are adding spring and damper in series and parallel insecond order system
- Q Write an ESSAY on what you understand about:1. Anti- Ice and De-ice2. Type of Ice3. Type of ice accretion detectors4. Areas need for protections5. 4 principle of Anti-ice6. Rain protection.MAKE...
- Q write a “quiz†program on a topic, about which you areknowledgeable. this quiz can be work related, general knowledge orany set of questions where there is a specific answer. ignorequestions...
- Q Explain the importance of mechanical engineering in today’ssociety. 800 words.
- Q A 20 kg block of iron and a 50 kg block of lead are sealedtogether in a tank with 5 kg of air. Initially the iron, lead, andair are at...
- Q Mark Each One True (T) or False (F)33. Polymers have only covalent bonding and no other type ofbonding.34. Weight average molecular weight and number average molecularweight are the same.35. Teflon...
- Q A horizontal uninsulated steam pipe passes through a large roomwhose walls and ambient air are at 300 K. The pipe of 125-mmdiameter has an emissivity of 0.85 and an outer...
- Q product safety for engineersWhy can a manufacturer be held liable if an injury is due toperson’s use of the manufacturer’s product in a way which was notintended?
- Q Using the SSL values of T, p and Ï,calculate thestandard atmosphere values at an altitude of 22km using theequations and graphs. How do these values compare to the valuesfound from...
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