Mechanical Engineering question and answers for August 03, 2023
- Q Which of the following is LEAST-Likely a starter driver part?Drive pinion gear, Flywheel, Crankshaft, Capacitor
- Q While having a discussion, Technician A says that a coolantposition sensor attached to the throttle body on the air inletsenses how many degrees the throttle plate is open. Technician Bsays...
- Q Briefly describe one of the method of incorporating fibers into matrix (i.e. fiber reenforced composite manufacturing method).Â
- Q One kilogram of water is contained in a piston-cylinder deviceat 100 degC. The piston rests on lower stops such that the volumeoccupied by the water is 0.835 m3. The cylinder...
- Q A potential wind turbine location has an average wind speed of 5m/s at a height of 10 m.A) Assuming a standard wind friction coefficient of 1/7, what isthe average wind...
- Q 19. 4.5 lbm of water at 158 oF is mixed with 8.3 lbmof water at 30.9 oF. If the specific heat of water is0.8 BTU/lbm-oR, find the resulting temperature of...
- Q 15. A reversed Carnot engine (refrigeration unit) is used tomaintain the temperature inside a freezer at -34 oC. Theroom temperature in which the refrigeration unit operates is aconstant 24 oC....
- Q The state at the beginning of compression of an air-standardDiesel cycle is fixed by p1 = 100 kPa and T1 = 310 K. Thecompression ratio is 18 and the cutoff...
- Q A spring loaded piston cylinder device contains 3 kg of carbondioxide which can be assumed to be an ideal gas. The system isheated from 110 kPa, 23C to 1100kPa, 305C....
- Q Nitrogen undergoes an isothermal process from 100 kPa to 500kPa, T = 300K. How much specific work was required for thisprocess?
- Q You are looking to purchase the DeWalt air compressor. Assumingthe compressor operates (outputs) air at 90psi and at 110F. If theatmospheric pressure is 0 psig and the atmospheric temperature is65F,...
- Q An industrial machine weighing 1000 lb is supported by springswith a static deflection of 0.20 inches. The machine has a rotaryunbalance of 20 lb / in. If this machine is...
- Q Evaluate the challenges and opportunities in the aircraftmanufacturing industry following World War II as commercial andmilitary aircraft evolved from piston-engine tohigh-performance,jet aircraft. In your analysis, consider factors that influencedthe aircraft...
- Q 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 Measurement Engineering course (Mechanical...
- Q Air flows through a short duct with a smooth inside surface andgradually changing flow area. The measured flow rate is equal to288 lbm/min. At the duct inlet, the temperature is...
- Q Water will be pumped from a reservoir free surface of which isat an elevation of “z1†to reservoir the free water surface ofwhich is at “z2â€. Both of the reservoirs’...
- Q The Saturn V rocket used to launch Apollo 11 to the moon has amass of 2.8x106kg. The first stage contains 2.17x106 kg of fuel.Assume that a uniform burn rate (fuel...
- Q Tool wear can result ina. increases in part sizeb. increases in surface roughnessc. increases in machining forcesd. all of the abovee. a and b only
- Q (a) Perform Von-Neumann stability analysis for 1-D transientheat conduction equation and establish the limiting condition fortime step.(b) Compare hybrid differencing scheme and QUICK schemes in finitevolume formulation of fluid flows.(c)...
- Q (a) What is the significance of integration of the governingequations over a control volume during the finite volumediscretiztion?(b) Explain the significance of Peclet number and its impact ondiscretization scheme selection.(c)...
- Q How do I solve this system of equations without using acalculator or fancy matrix math?v1 = 1.8 v2 = ? v3 = ?(1) v1 = 1.8(2) 7150v2+1350v3Â Â = 12780(3) 7150v22 +1350v32...
- Q The pressure in a car tyre depends on the temperature of the inthe tyre. When the air temperature is 27C, the gage pressure is 210KPa. If the volume of the...
- Q A converging–diverging nozzle is designed to generate an exitMach number of 2. The nozzle is supplied with air from a largereservoir in which the pressure is kept at 6.5 MPa....
- Q . A rectangular steel bar is subjected to a fluctuating loadfrom 30 kN tension to 30 kN compression. The bar is 30 mm wide and7 mm thick with a hole...
- Q 1a. Spheroidite steel is a good example of Metal MatrixComposite material. What are the matrix material and the dispersedphase acting as a reinforcing agent?1b. Name one material that is commonly...
- Q 1a. Spheroidite steel is a good example of Metal MatrixComposite material. What are the matrix material and the dispersedphase acting as a reinforcing agent?1b. Name one material that is commonly...
- Q A pump has a displacement volume of 8 in3. It delivers 20 gpm at800 rpm and 1100 psi. If the prime mover input torque is 2000 in ·lb, a) What...
- Q Air expands through a turbine operating at steady state. At theinlet, p1 = 150 lbf/in.2,T1 = 1400°R, and at the exit,p2 = 14.8 lbf/in.2,T2 = 900°R. The mass flow rate...
- Q Given:• Stagnation-to-Stagnation pressure ratio P02/P01 = 3.0• Mass flow rate m= 0.8 kg• Inlet stagnation conditions of To1 = 295 K and Po1 = 100kPa• Tip speed U2 < 500...
- Q Â Â A) What is the difference between datum, datum simulator and datum feature? Illustrate by example.B). Why is surface & plane and line & axis specifically mentioned as datums? Are they...
- Q The state at the beginning of compression of an air-standardDiesel cycle is fixed by p1 = 100 kPa andT1 = 310 K. The compression ratio is 18 and thecutoff ratio...
- Q Air enters the compressor of a simple gas turbine at p1 = 14lbf/in2, T1 = 520°R. The isentropic efficiencies of the compressorand turbine are 83 and 87%, respectively. The compressor...
- Q Air enters the compressor of a simple gas turbine at p1 = 14lbf/in2, T1 = 520°R. The isentropic efficiencies of the compressorand turbine are 83 and 87%, respectively. The compressor...
- Q Q3. 5 kg of water at T = 20° C and P = 7 bar is isobaricallyheated such that ΔU = 5000 kJ. (i) Find the initial and finalvolumes (in...
- Q A layer of cork 6 inch thick is used as layer ofthermal insulation in a flat wall. The temperature of the cold sideis 40 oF and that of the warm...
- Q Design a refrigerator working on propane ammonia andR407C refrigerant and producing -20K, -10K and O K temperatureduring steady state operation....carryout experimental validation using appropriatesoftware.write energy and exergy equation in Fortran...
- Q Towers for support of the electric lines are made of wood(as-grown or laminated), steel or aluminum (either latticestructures or tubular poles), concrete, and occasionally reinforcedplastics. What would you choose, and...
- Q while servicing a pair of aluminum cylider heads:technecian asays if needed,both heads must be machined equally and the sameamount of material removed from each.technecian b says replacebboth heads if warpage...
- Q determine the cutting speed and calculate spindle RPM fordriiling a 1.5\" diameter hole ins AISI-SAE 1020 steel with abrinell hardness of 125 to 175
- Q A gas with cp = 0.950 kJ/kg-K enters an insulated nozzle at30oC and a velocity of 8 m/s. The gas exits at avelocity of 100 m/s. Assuming constant specific heats...
- Q An alloy of magnesium and lead is 50% lead by weight. A) convertthis alloy to an equivalent atomic percentage. B) Convert thisalloy to an equivalent volume percentage
- Q Determine the force vs reduction in height curve in open-dyeforging of a cylindrical, annealed copper specifmen 10mm high and25mm in diameter, up to a reduction of 50% for the followingcases:a)...
- Q Complete exercise 9.20 from the text.(a) Create a function called polygon that draws a polygon in apolar plot. Your function should have a single input parameter –the number of sides.(b)...
- Q Air flows through a pipe that has a length of 45 mwith an inside diameter of 0.025 m. The Mach number of the flowexiting the pipe is 0.26, with a...
- Q . You have two thermal couples. One thermal couple is fixed inspace at (Xo,Yo,Zo) and the second thermal couple is moving inspace. At time to, the second thermal couple moves...
- Q P2) Ethane in a rigid vessel is to be heated from 0.5MPa and 40°C to 290 °C. Using the compressibility chart, determine the finalpressure.
- Q 2. If produced by Method A, a product’s initial capital costwill be $100,000, its operating cost will be $20,000 per year, andits salvage value after 3 years will be $20,000....
- Q 2. If produced by Method A, a product’s initial capital costwill be $100,000, its operating cost will be $20,000 per year, andits salvage value after 3 years will be $20,000....
- Q Estimate the heat loss rate from a person who can beapproximated as a cylinder of diameter 0.3 m and height 1.8 m. The(clothing) surface temperature is 23 °C and the...
- Q Two sections of a pressure vessel are to be held together by 5/8in-11 UNC grade 5 bolts. You are told that the length of the boltsis 1.5 in, the length...
- Q A deli meats factory pumps a liquefied meat mixture throughround plastic pipe that is 75mm inside diameter. Assume that theliquid meat mixture has a specific gravity of 0.9, a dynamicviscosity...
- Q You have to build a long cylinder that will be compressed at anangle slightly askew from the long axis of the cylinder. Thatsqueezing force will cause a Z-axis pancake stack...
- Q In 50-100 words describe how culture and training allowed theUberlingen disaster to happen
- Q Bananas are to be cooled from 28°C to 12°C at a rate of 1140kg/h by a refrigerator that operates on a vapor-compressionrefrigeration cycle. The power input to the refrigerator is...
- Q Consider a large tank holding 50 gal of pure waterinto which a brine solution of salt begins to flow at a constantrate of 6 gal/min. the brine leaves the tank...
- Q In 50-100 words describe ADS-B. Explain how this technology willallow for reduced separation during cruise flight (from 3 milesdown to as little as 1 mile).
- Q (type if possible) As you’ve seen, static pressures increasewith decreasing velocity. Qualitatively describe how this principleexplains how an airplane wing generates lift. How might such ananalysis be useful in designing...
- Q A 2 in schedule 40 pipe insulated with 1 in of 85% magnesia iscarrying a fluid at 800°F. The insulated pipe passes through a roomat 80°F, and the outside surface...
- Q What toughening mechanisms are present in the cermets (10% Vol316L-90%TiC & 20% Vol 316 L 80% TiC) that are not in notpresent in alumina? Discuss thesemechanisms and the difference in...
- Q A micro gas turbine is designed to operate on the regenerativeBrayton cycle and is sized to produce 400kW of netelectric power. Air enters the compressor at100kPa and 300K (dead state),...
- Q Problem 5: A total of 6 measurements are made of the mass of aninjected molded part. The measurements are: [2.68 kg 2.66 kg 2.16kg 2.12 kg 2.50 kg 2.96 kg]...
- Q 3. a) Write a script to prompt the user for the length and widthof a rectangle, and print its area with two decimal places. Putcomments in the script. b) Convert...
- Q which grade of steele example steel 304,316, 321,202, issuitable and easy drilled? please give right answer
- Q A finite wing area of 1.5 ft2 and aspect ratio of 6 is tested ina subsonic wind tunnel at a velocity of 190 ft/s at standardsea-level conditions. At an angle...
- Q Describe two examples of automation technology that contributedto the development of additive manufacturing and why additivemanufacturing would not be possible without that technology.Design for X (DFX) is a design philosophy...
- Q Design for Sustainability (DFS) is a DFX emphasis onsustainability, meaning that the primary design emphasis is onminimizing the negative or adverse impacts of production, usuallywith respect to ecology, but also...
- Q Explain how an STL file can be brought into SolidWorks andprocessed. This would be as taken from a 3D scanner.
- Q in your own words what an STL file in (SolidWorks) is and howit is used in rapid prototyping. For the references ?
- Q 1.Write down the fplot( ) command used to generate a straightline formed by two (x, y) points: (-3, 5) and (3, 8). Plot the linefrom -5 ≤ x ≤ 5....
- Q From the diameter and effective surface temperature of the sun,estimate the rate at which it emits energy. What fraction of thisemitted energy is intercepted by the earth? Estimate the solarconstant,...
- Q Problem 2.Problem 1.An ideal Rankine Cycle with reheat uses water as the workingfluid with a flow rate of 0.15 kg/s.At the inlet of the turbine (state 1) the water is...
- Q An ideal Rankine Cycle with reheat uses water as the workingfluid with a flow rate of 0.15 kg/s.At the inlet of the turbine (state 1) the water is a superheatedvapor...
- Q 3. Upper bike price is $4600, middle bikes price is 10,000.Describe which is the best value for you as a student and why.Identify the critical path on the FAST diagram.4....
- Q An ideal Rankine Cycle with reheat uses water as the workingfluid with a flow rate of 0.15 kg/s.At the inlet of the turbine (state 1) the water is a superheatedvapor...
- Q As part of a mechanical device there is a circular cog, Cog1,that has a diameter of 50 cm. From the mechanic’s point of view,when the device is in action, Cog1...
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