Mechanical Engineering question and answers for July 25, 2023
- Q Explain how Doppler (Fuel Temperature Coefficient) changes asfuel temperature rises. Why does this occur? A picture will behelpful.
- Q Show to use ode45 built-in function in MATLABto solve the following ODE problem:dydx=x^2 / y y(0)=2Â Â Calculate y(x) for 0 ? x ? 20 and compare the results toanalytical solution y...
- Q 1. What has the greatest influence on the length and detail of aprocess plan, and why?2. What usually determines the way a process plan startsout?
- Q Ifa solution with 50% one fluid 50% another flowing through a pipe,with a given temperature, and internal diameter of pipe andpressure gradient per metre.How would you confirm the flow is...
- Q 1)Describe what a “riser†is in the context of sand casting.What are its functions?In light of Chvorinov’s rule, what should be taken into accountwhen determining the geometry, dimension, andlocation of...
- Q 1)Describe what a “riser†is in the context of sand casting.What are its functions?In light of Chvorinov’s rule, what should be taken into accountwhen determining the geometry, dimension, andlocation of...
- Q The spectral absorptivity of a large diffuse surface is????=0.850 for ??<1???? and ????=0.25 for ???1????. The bottomof the surface is well insulated, while the top may be exposed toone of...
- Q Two parallel rectangles having emissivities of 0.6 and 0.9 areeach 1.2 meters wide and 2.4meters high. They are positioned 0.6 meters apart. The plate with ?= 0.6 is at 1000...
- Q In the rolling lab we measured the following conditions:R = 32.25; % roller radius (mm)Nr = 30; % roll rotational speed inrpmA 8-pass flat rolling process was performed with one...
- Q A Cessna 172 has the following characteristics: Wingspan: 36’ 1â€Wing Area: 174 ft2 Normal Gross Weight: 2,450 lb Fuel Capacity: 54gal of aviation gasoline Power Plant: 1 × Lycoming IO–360–L2Apiston...
- Q An automotive engine develops maximum torque at a speed of 1000rpm At this speed, the power developed by the engine is 25 kW. Theengine is equipped with a single plate...
- Q A component requires two (2) operations to complete it. Thefirst operation has the following information: Machining Time =2.445 min., Handling Time = 1.334 min., Tool Change Time = 21.45min. which...
- Q Write and test MatLAB code implementing the mathematical modelsof the boundary value problem to evaluate the elastic deflection ofthe beam based on Euler-Bernoulli and Timoshenko theories withfinite difference discretisation (for...
- Q A voltage source and a current source both supply current on anelectrical system. So why do we call a voltage source a voltagesource? What is the difference between the two?
- Q The energy flux of solar radiation arriving at Earth orbit is1353 W/m2. The diameter of the sun is 1.39x109 m and the diameterof the Earth is 1.29x107 The distance between...
- Q Write down the equation for the Stress-Strain relation in afluid.
- Q Express the shear stress at a wall, using the Newtonianmodel.
- Q A 2in dia bolt is clamping sheets of the metal which are 8mmthick.the total length of the bolt is 12in. Calculate the length ofthe total threaded portion as well as...
- Q Which type of extinguisher can be used on all classes offire?A. WaterB. FoamC. Class DD. None of the above
- Q Question from Transport Phenomena in Material Processing, D.R.Poirer & G.H. Geiger#12.10Describe the conditions under which the following terms areapplicable: (1) self diffusion, (2)tracer diffusion, (3) chemical diffusion, (4) interstitialdiffusion, (5)...
- Q A vapor-compression heat pump with a heating capacity of 500kJ/min is driven by a power cycle with a thermal efficiency of 20%.For the heat pump, Refrigerant 134a is compressed from...
- Q A vapor-compression heat pump with a heating capacity of 500kJ/min is driven by a power cycle with a thermal efficiency of 20%.For the heat pump, Refrigerant 134a is compressed from...
- Q The majority of metals processing starts with what type ofprocessing technique?What is the difference between a wrought and a cast product?Describe the Disamatic casting process. What is the advantage tothis...
- Q At the beginning of compression process of an air standard dualcycle operating with a compression ratio of 15.88, the pressure is95 kPa and the temperature is 300 K. The cutoff...
- Q The seawater through which a boat sails moves 4 knots towardsthe East with respect to the bottom of the sea. The boat moves 15knots with a direction of 60 degrees...
- Q Consider a Rankine cycle with an ideal intermediate steampickup, one of which is open and the other is closed feed waterheaters. The steam enters the turbine at 12.5 MPa pressure...
- Q A spring with a spring rate of 75 lb/in has a working deflectionof 1 in. It provides a minimum of 150 lb at installation. Thespring is formed from 0.25 in...
- Q A single-tooth hardened-steel worm has a catalog rating of 2000W at 600 rev/min when meshed with a 48-tooth cast-iron gear. Theaxial pitch of the worm is 25 mm, the normal...
- Q Complete problem 4.53 in the textbook. Calculate what is askedfor with the given Young’s modulus, but also assuming the floor isconcrete, and if it is rubber. You may use Matlab...
- Q Determine the resolution of a manometer required to measure thevelocity of air at 50 m/s using a pitot tube and a mercurymanometer to achieve an uncertainty in the velocity of...
- Q Can I have a two-page summary of the book of \"Theory and Designfor Mechanical Measurements\", Sixth Edition starting from Chapterone to chapter seven? In your summery please show in your...
- Q Can I have a two-page summary of the book of \"Theory and Designfor Mechanical Measurements\", Sixth Edition starting from Chapterone to chapter seven? In your summery please show in your...
- Q A mass of 5 kg of saturated liquid vapor mixture of water iscontained in a piston cylinder device at 100 kPa, initially 2 kg ofwater is in the liquid phase...
- Q Explain with sketch the hydrodynamic effect in hydrodynamicjournal bearings.
- Q there is a vertical air space and heat is transferredhorizontally. Surface temperature on the two sides of the air spaceare -10 and 10F respectively. The thikness and effectiveemmitanceof the air...
- Q Write a user-defined MATLAB function that uses classical fourthorder Runge-Kutta method to solve a first order ODE problem dydx =f(x, y) in a given interval a ? x ? b...
- Q Whyis representation of features important in technical drawing forengineers?
- Q How can you make glass that is1) MechanicallyFlexible, 2) Electrically Conductive, and 3)Optically Transparent?
- Q Explain the working principle of construction hoist and itsapplication ?
- Q The pressure p and volume v of a given mass ofgas are connected by the relationk=(p+a\v^2)(v-b)where a, b, and k are constants.Using the composite trapezoidal method, write a MatLab script...
- Q Describe the effect of both temperature and strain rate on thestiffness, strength and ductility of viscoelastic polymermaterials.
- Q Regarding the fracture mechanism of metals, polymers andceramics(a) Explain why FCC metals show a ductile fracture even at lowtemperatures while BCC metals do not.(b) What is crazing? What can you...
- Q 13.75 Air enters the compressor of a simple gasturbine power plant at 70F, 1 atm, is compressed adiabatically to40 lbf/in.2, and then enters the combustion chamber where it burnscompletely with...
- Q what is the difference between electrode and filler inwelding process?how do you select proper electrode and filler inyour process?
- Q Provide a summary of the ASTM E112–12 standard’s definition ofthe grain size number G. Your summary should give the precisemathematical definition for G. Your summary should also supply aconceptual description...
- Q Solve an equation where the input is a complex number.s = x + j(3)^0.5*xEquation: s^3+3*s^2+2s+k = 0Solve for k and x
- Q An ideal Brayton cycle stationary power plant operates with apressure ratio of 10 to 1. if it is designed to generate 800 MW ofpower what is the minimum flow rate...
- Q Hydraulic excavators always have a 4-bar linkage between theinverted crank-slider mechanism and the bucket. Find a picture fromwhich you can determine if this 4-bar linkage is a triple rocker, adouble...
- Q Consider a fluid flowing perpendicular and over a longcylindrical body and the free stream velocity described by equationU(x) = 2 Uinf sin (x/R) where R=D/2 is the radius of thecylinder.For...
- Q 3. Describe step-by-step brittle fracture of some metals andceramics with poor ductility and toughness. In discussion highlightand use relevant terms such as transgranular, Chevron pattern andothers.Text Book- The Science and...
- Q The flow rate of warm air into the air conditioning is5,000 cfm. An air conditioning system takes outdoor air at95 degrees F dry-bulb and 70% relative humidity, and discharges itat...
- Q fluid mechanics question:Why do birds have long narrow wings?
- Q A solid sphere ofradius R is rotating with angular velocity w (omega) in otherwisestill infinite fluid of density p (rho) viscosity u (mu).(a) For creeping flowassumptions to hold, which condition(s)...
- Q (Chapter 10)Q: Explain the difference between coarse and fine pearlite?
- Q how do you make an engineering and true stress-straincurve given the displacement (mm) and force (N)
- Q only for field engineers please: why would you choose to thissegment \"measurement while drilling\"?why would you choose \" well completion\"?
- Q (Materials Testing Results)Q: The 30% rubber group reported Rockwell numbers for fresh 48hour and old as 12.5,21.5, and 88.5. How do you explain theseresults?
- Q Explain the importance of Fanno and Rayleigh flows in the design ofNozzles for jet propulsion
- Q (Materials Testing Results)Q: The 30% rubber group reported a strain at yield of 0.38 and astrain at break of 0.3. Please explain this change.
- Q A helical compression spring has 14 active coils and the freelength is 12.5in. The outside diameter is 7/16 in and the springhas squared and ground ends. The end plates are...
- Q Using Excel, plot the internal temperature of a computer chip k=1.38 W/(m-K) that generated 2,000 W of power. The chip is 10 cm wide. Assume one side is at 40oC...
- Q The mean diameter of the square threaded screw having pitch of10 mm is 50 mm. A load of 20 kN is lifted through a distance of 170mm. Find the work...
- Q Find an important engineering failure that involves some of thetopics discussed in MSE 350. Describe the failure, why it occurred,the damage (human, environmental, and economic) and the changesthat could have...
- Q A centrifugal compressor has 22 radial impellers with animpeller exit radius of r2 = 0.25m.Assuming the mass flow rate through the compressor is mdot =10kg/s, the shaft speed isomega =...
- Q The electrical conductivity and the electron mobility for copperat room temperature are 6.0 X 107 (W.m)-1 and0.003 m2/V-s, respectively. Compute the number of freeelectrons per copper atom.
- Q QUESTION 1Tick the option which correctly describes the units ofparameters defined in an operation sheet?a.Cutting Speed (ft/min), Spindle Speed (rev/min), Feed (in/rev),Depth of Cut(in)b.Cutting Speed (in/min), Spindle Speed (rev/sec), Feed...
- Q If a strain gage is placed in the wing of an aircraft where thetemperature drops by 50 degrees F in flight. How do you configurethe bridge to compensate for the...
- Q Water vapor at 5 bar, 320°C enters a turbine operating at steadystate with a volumetric flow rate of 3 m3/s and expandsadiabatically to an exit state of 1 bar, 160°C....
- Q Regarding Fused Deposition Modeling (FDM)process, answer the following questions with a detailedexplanation:1. How and why temperature, pressure/force, and time impact thefollowing quality issues:- Surface finish- Dimensional accuracy2. ?Identify and explain...
- Q a.) What is the thermal efficiency of a steam power plantoperating on the Rankine cycle if saturated steam is supplied tothe turbine at 1000 psia, and the condenser is at...
- Q Derive the electromagnetic wave equation in terms of themagnetic field H
- Q Briefly describe what a duct blowers function is as it appliesto residential energy audits
- Q You and your teammates will construct a Concept Map that clearlyillustrates how to use the \"steam tables\" (A-4 through A-7 in SIunits) to find the thermodynamic properties and/or determine thephase...
- Q At what distance ‘X’ will the carbon concentration in a steelspecimen be 0.70 wt. % after 10h at 1100 0C, if the startingcomposition was 0.35 wt. % C and the...
- Q Carbon Dioxide is being generated in an occupied space. Eachperson breathe out carbondioxide at the rate 0.0107 cfm. Outdoor air with CO2concentration of 280 ppm is beingsupplied to the space...
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