we assumed that, whenever fins are attached to a base material, the base temperature is unchanged. What in fact happens is that, if the tempera- ture of the base material exceeds the fluid temperature, attachment of a fin depresses the junction temperature T below the original t...
19 Aug 2020A bar of diameter 25mm has an axial hole 19 mm bored out concentric with the outer circumference. The bar is submitted to the following loads simultaneously: (a) An axial tension of 13kN. (b) A bending moment of 100Nm. Determine the maximum and minimum normal stresses on the sect...
19 Aug 2020Using the differential equations of the elastic line, calculate the maximum deflection of the beam shown in figure below if it has a flexural rigidity El and the location of the maximum deflection. Also calculate the slopes at points A and B. 23F1 4FL SFL FX = L 8/3, 2 Ans: 48 ET...
19 Aug 2020Compare the buoyant force on a ring of artery versus a ring of siti- cone rubber. Assume that each is 4mm in internal diameter, 0.8mm in thickness, and 3 mm in length. Compute the volume of Styrofoam that would need to be glued to each ring to render it neutrally buoyant. Ass...
19 Aug 2020Example questions 2.5 Example questions Exercise 2.1 Force (= 80 N and the resultant R=120 N (→). Determine the magnitude of force P and the angle a. Answers: P=58.3 N, O=35.44° Exercise 2.2 509 Force Q = 80 N and the resultant R is horizontal. Determine the magnitudes of both fo...
19 Aug 2020Sketch the Bode asymptotic magnitude and asymptotic phase plots for the following function. absady (s3)(s5) s(s 2)(s 4) G(s) =
19 Aug 2020Using the Nyquist criterion, find out whether the following system is stable. R(s) 50 5(8 3)(s 6)
19 Aug 2020Example questions 2.5 Example questions Exercise 2.1 Force Q = 80 N and the resultant R= 120 N (→). Determine the magnitude of force P and the angle e. Answers: P=58.3 N, O = 35.44° Exercise 2.2 50° Force Q = 80 N and the resultant R is horizontal. Determine the magnitudes of bot...
19 Aug 2020Using the Nyquist criterion, find the range of K for stability for the following system: RIS (s 4)(s 6) Nyquistagram 0015 - Imaginary Arts RealAxis
19 Aug 2020with the aid of diagram, discuss the differences between the mechanics of ductile-britti transition and inter granular fracture. Dengan bantuan gambar rajah, bincangkan perbezaan diantara mekanik perubahan mulur-rapuh dan rekah antara butir ) (8 Marks/Markah) (b) A composite DCB...
19 Aug 2020An equimolar mixture of helium and argon gases enters a turbine at 1280℃ and expands adiabatically through a 7.5:1 pressure ratio. If the isentropic turbine efficiency is 80%, determine at steady state the work developed, in kJ per kg of mixture flowing.
19 Aug 2020Two immiscible, incompressible, viscous fluids having the same densities but different viscosities are contained between two infinite, horizontal, parallel plates (Fig. P6.93). The bottom plate is fixed and the upper plate moves with a constant velocity U. Deter- mine the velocit...
19 Aug 2020Shows the terminal styles available for making separable connections in electrical wires. Terminal Barrel Wire Figure: 5 a) Which manufacturing method is suitable for making electrical wires? (4 Marks) b) How will you make the different terminal styles shown in figure 5? (6 Marks...
19 Aug 2020If a steel pipe with square cross sectional area measuring 30m in length and 0.053m in width (internally) is used for conveying liquid at the rate of 2x10 m3/s, calculate the frictional pressure drop for the pipe, given that the liquid has dynamics viscosity 0.001kg/ms, and densi...
19 Aug 2020Argon gas enters an adiabatic turbine steadily at 900 kPa and 450°C with a velocity of 80 m/s and leaves at 150 kPa with a velocity of 150 m/s. The inlet area of the turbine is 60 cm2. If the power output of the turbine is 250 kW, determine the exit temperature of the argon. 4, -...
19 Aug 2020Consider the electrical and mechanical dynamics of a DC motor (effect of L is neglected) that is loaded (without a gearbox reduction) by a rack&pinion gear set with pinion radius r and applies a rightwards pulling force F to an inverted pendulum system. We want to achieve a preci...
19 Aug 2020A hypodermic syringe (see Fig. P5.30) is used to apply a vaccine. If the plunger is moved forward at the steady rate of 20 mm/s and if vaccine leaks past the plunger at 0.1 of the volume flowrate out the needle opening, calculate the average velocity of the needle exit flow. The ...
19 Aug 2020A FEM analysis was used to analyse the safety of a mechanical component made by an average steel (E = 2 × 10° M Pa, v = 0.25, oy= 600 M Pa). For a given loading scenario, the stress tensor E in a critical point is reported below. Calculate the von Mises equivalent stress oVM and ...
19 Aug 2020Contact involves: Select one: O a. changes in material properties. o b. changes in boundary conditions. O c. changes the infinitesimal strain tensor formulation in each element involved in the contact
19 Aug 2020A two-dimensional distribution of doublets oriented in the vertical direction, with constant strength u = (0, u), is placed along the x axis (0
19 Aug 2020Find the camberline shape that leads to a constant-pressure jump along the airfoil chordline for zero angle of attack.
19 Aug 2020Consider the flow of a uniform stream of speed Qo at angle of attack a past a thin airfoil whose upper surface is given by the parabola in Eq. (5.80) and whose lower surface is z = 0. Find the lift coefficient and moment coefficient about the leading edge. mallu) = 4* [ - ] (5.8...
19 Aug 2020Consider the Fourier coefficients for the lifting-line circulation in Eq. (8.42). Show that for wing loading symmetrical about the midspan the even coefficients are zero and for antisymmetrical loading the odd coefficients are zero. Γ(Θ) = 25Ω. ΣΑ, sinne (8.42)
19 Aug 2020The governing equation for the Fourier coefficients in Problem 8.1 is Eq. (8.58). , One method for the numerical solution of this equation is to set all coefficients equal to zero for n greater than some value, say N, and to evaluate the equation for N values of e. The N linear e...
19 Aug 2020A 25 kg block A rests on an inclined surface and a 15 kg counter-weight B is attached to the cable. Neglecting the friction a) Using the constant length of the cable relate the acceleration of A to the relative acceleration of B with respect to A a) Draw FBD for B and express equ...
19 Aug 2020Consider a system in which two pumps with capacities of 30 gal/min and 40 gal/min are connected in parallel. An output of 50 gal/min is required for successful operation. The reliabilities for the modules over the given mission time are R = 0.90 R2 = 0.80 a) Generate a Reliabilit...
19 Aug 2020Consider a pumping system in which two shutoff valves are installed in series in order to assure that the flow can be stopped when necessary. The valves are normally open and when they fail, they fail open. The reliabilities for the valves over the given mission time are R R =0.9...
19 Aug 2020Consider a system in which three pumps with capacities of 30 gal/min, 40 gal/min and 50 gal/min are connected in parallel. An output of 80 gal/min is required for successful operation. The reliabilities for the modules over the given mission time are Ri - 0.90 Applid R2 - 0.80 Re...
19 Aug 2020Air flows into the atmosphere from a nozzle and strikes a vertical plate as shown in Fig. P5.57. A horizontal force of 12 N is required to hold the plate in place. Determine the reading on the pressure gage. Assume the flow to be incompressible and frictionless. If the flow is su...
19 Aug 2020Three square hollow sections of carbon fibre tube are joined to make a cantilever beam.This will be subject to 2 point loads. I think I have done the calculations correctly (apart from max bending moment as I struggle with double integration) any advise on this ?The main objectiv...
19 Aug 2020A thick-walled tube of stainless steel (k =19 W/m C] with 2-cm inner diameter (ID) and 4-cm outer diameter (OD) is covered with a 3-cm layer of asbestos insulation [k =0.2 W/m. CJ. If the inside wall temperature of the pipe is maintained at 600 C, write the heat flux in the form...
19 Aug 2020Calculations (60 points): K1) A thick-walled tube of stainless steel (k 19 W/m°C) with 2-cm inner diameter (m an 14-сm outer diameter (OD) is covered with a 3-cm layer of asbestos insulation [k=0.2 W/m. C). If the inside wall temperature of the pipe is maintained at 600°C, write ...
19 Aug 2020wo parallel black rectangular plates 0.7 by 1.0 m are put apart. One plate is maintained a med at 1273K and the other at 573K. What is the net radiant heat exchange en The two plates? Assuming the shape factor from platel to plate2 F 2 is 0.3, and the Stefan constant o -5.67x108....
19 Aug 2020Two parallel black rectangular plates 0.7 by 1.0 m are put apart. One plate is maintained at 1273K and the other at 573K. What is the net radiant heat exchange between the two plates? Assuming the shape factor from platel to plate2 F12 is 0.3, and the Stefan o =5.67x10. (10points...
19 Aug 2020Simple Question & Answer (40 points): (1) In conduction, heat transfer rate is related to what two factors besides the surface and Or please write the mathematic expression of one dimensional form of Fouriers law of conduction. (4 points) (2) In heat transfer, we often group seve...
19 Aug 2020Simple Question & Answer (40 points): (1) In conduction, heat transfer rate is related to what two factors besides the surface and Or please write the mathematic expression of one dimensional form of Fouriers law of conduction. (4 points) (2) In heat transfer, we often group seve...
19 Aug 2020Plot the process of air(n=1.4) on p-v and T-s diagram, and indicate the minus or plus sign of and Au. (8 points) KI) Process 1-2: reversible compression process, n=1.6 K2) Process 1-3: reversible expansion process, n=1.2 0 0, 0, Au>
19 Aug 2020n convection, the thin re viscosity are observed is called vection, the thin region of flow that neighboring the wall in which the effects of are observed is called what layer? And in this laver the flow often starts from the regular streamline and then become totally irregular. ...
19 Aug 2020A 5-cm-diameter steel sphere (p=7800 kg/m?, c=0.46 kJ/kg. •C, k=35 W/m..C) is initially at a uniform temperature of 200°C. It is suddenly exposed to an environment at 20 •C having a heat-transfer coefficient h=28W/m2 • °C. Using the lumped-capacity method of analysis, write out ...
19 Aug 2020A counter flow single pass double pipe H.E is supplied with hot oil at 120 °C, which is to be cooled to 45 °C by water entering at 18 °C, which flows through the annulus. The mass flow rate of the oil is 0.09 kg/s, and that of the cooling water is 0.14 kg/s. The specific heat cap...
19 Aug 2020A 5 kg mass disc is welded to a uniform rod of mass 12 kg as shown. Determine the angular acceleration a of the system and components of the reaction at B when a force P = 50N is applied and the system is rotating with an angular velocity of 0 = 10 rad/s. %3D 0.2 m 0.6 m A @ = 10...
19 Aug 2020The 40 mm-diameter rod is subjected to the loads shown. Determine the state of stress at points A and B, and show these stresses on a differential element located at these points. 75 MPa (b) For the shown stressed element, determine: 1. The principal stresses. 125 MPa 2. The maxi...
19 Aug 2020Design the condenser of a steam power plant that has a thermal efficiency of 40 percent and generates 10 MW of net electric power. Steam enters the condenser as saturated vapor at 10 kPa, and it is to be condensed outside horizontal tubes through which cooling water from a nearby...
19 Aug 2020The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio. (3 тarks) 2- decrease 1- Increase 3- remain the same c) In a gas turbine plant, a generator increases..... 1- Work output (3 тarks) 2- thermal efficiency 3-pressu...
19 Aug 2020In limit of small scale yielding, sharp crack blunting with plastic deformation can be related to G and K, by crack tip opening displacement (CTOD), 8 = .. In this stage, LEFM is no longer valid. Figure 4 shows the hinge model for estimating CTOD from three point bending specimen...
19 Aug 2020Solve the initial value problem y" - Ly 4y=0 ylo)= y(o)= Answer; y(t) = 64 - tek
19 Aug 2020problem Solve the initial value y"-2y 2y = et ylo)=0 y(o)=2 Answer; y(t) = b et t et cost - 2 Esinta
19 Aug 2020This section is designed to test your knowledge of manufacturing technologies, your ability to select a manufacturing process for a given situation and your design-for-manufacture skills. Question No: 1 Figure: 1 shows a paper cup and its dimensions in mm. 090- Figure: 1 a) Consi...
19 Aug 2020show the raw material form and Figure 3 show the finished form of a tri cone bit used in oil rig operations TUNGSTEN CARINDE INSERTS CONE in Core END ROLLER BEARING BALL BEARING ROLLER BEARING BALL PLUG GAGE PROTECTIVE INSERTS SHIRT TAIL PROTECTION LEG PROTECTIVE INSERTS BACK OF ...
19 Aug 20204, 5 and 6 shows a chuck jaw of a lathe Figure: 4 Figure: 5 Body Manufactured from high strength alloyed cast iron. ensure better bearing properties for longer life . Made from case handen Aloping face ground for accurate arrested External awwwpplied with each chuck 4 Holes For ...
19 Aug 2020