Mechanical Engineering question and answers for July 19, 2023
- Q A block sits on a flat horizontal surface. The block's mass is100kg. The coefficient of static friction is 0.3. The coefficientof kinetic friction is 0.25.Find whatis the friction cone angle...
- Q “Main landing gear of each aircraft is used to absorb the loadof the aircraft in landing/ take-off and also weight of it while itis on ground. After reaching its flight...
- Q A standard vapour compression cycle uning R22, whichhave the following data: > Power developed 50 kW ofreftigeration. - Power required for compression 11 kW. >Evaporation pressute 4 bur. > Mass...
- Q MATLAB CODE: Making cubic spline iterpolation function. Then, Tosolve use Tridiagonal matrix algorithm(TDMA)xi-0.5-0.4-0.200.20.40.60.8yi0.040.10.410.350.20.30.04
- Q 6.1 Housing of gearboxanalyse and identify the manufacturing processes used to make thecomponent – both primary (bulk shape forming) and secondary (orfinishing) processes. Include sub-sub-section as follows for eachcomponent:o 6.1.1...
- Q Design an longitudinal and cirvumferential connectionsfor boilers that are 2.4 meters in diameter and loaded withpressure of 1 N / mm2. The longitudinal jointis made with a triple riveted butt...
- Q intower crane, explain the possibilility of inversions on theidentified mechanism .
- Q 3. Determine the effective spring constant of the followingsandwiches of materials under compressive load (determine thematerial spring constant only). The material sandwiches are beingheld in place by a ½-13 UNC...
- Q A 3/4-6 ACME threaded screw is used to lift a 2 kN load. Notethat this has a pitch of 1/6. The mean collar diameter is 4 cm.Find the torque to...
- Q In a closed combustion vessel, propane (C3H8) and air are mixedat equivalence ratio of 1.11, temperature of 298 K, and pressure of1 bar. The mixture is burned to produce solely...
- Q Explain what is Single-Phasing
- Q Particle A (mA = 1 kg) is given initial velocity 10 m/s to theright, while particle B (mB = 1:5 kg) is initially at rest. Thecoecient of restitution for any...
- Q material science question; Please write down the yourobservation of tearing a plastic bag in a (1) slow and (2) fastfashion, especially any difference in terms of morphology or crackformation!
- Q what are the benefits and disadvantages of a DynamicAbsorber.
- Q Design a gas power plant that works as a non-ideal RegenerativeBrayton cycle by determining the pressure ratio required tooptimize the net power output of the cycle. The minimum cycletemperature is...
- Q List and discuss different roboticapplications.
- Q In a gas turbine plant, air is compressed from 1.01 bar and 15?C through a pressure ratio of 4. It is then heated to 650 ?C in acombustion chamber, and...
- Q How many constant volume processes are modeled when analyzing anAir Standard Diesel cycle?Question 10 options:A)2B)4C)1D)3E)0
- Q A gas turbine plant consists of a compressor with a pressureratio of 10, a combustion chamber, and a turbine mounted on thesame shaft as the compressor; the net electrical power...
- Q What is a unit step function?Is the value U(0) = 1?Ex. when t=20 and equate to U(t-20)=U(0)=1???
- Q . In a gas turbine plant, air enters a compressor at atmosphericconditions of 15 ?C, 1.0133 bar and is compressed through apressure ratio of 10. The air leaving the compressor...
- Q why is the linear coefficient of thermal expansion in polymersgreater than that of ceramic?
- Q Elaborate briefly on the various types of friction experience bya body.
- Q Describe with a neat sketch the working of a single platefriction clutch
- Q Water flows in a horizontal pipeline at a steady flow rate of0.03 m3 s-1. The pipeline terminates with a reducing bend thatdeflects the water upwards at an angle of 45...
- Q Is the thrust generated typical of a small jet aircraft engine?I got -99 N explain and give me a source
- Q Write discussion, conclusion, recommendations, real lifeapplication of HYDRAULIC PRESSURE CONTROL VALVE-REDUCING VALVEOPERATION
- Q Howdoes oxidation effect steel and what consequences does this have onsteel bridges?
- Q USE SI UNITSProblem Statement Normalizing is a heat treatment process usedto relieve internal stresses, refine the grain size and improvemechanical properties. Normalizing is done to give steel a uniformand fine-grained...
- Q 4. (a) Draw a P-V diagram of a real refrigerator that uses 1 kgof HFC-134a as the working fluid.Identify the compressor. condenser. throttle and the evaporatorstages of the cycle and...
- Q 4. A Rankine cylce operates between pressures of 2 psia and 1500psia. If the steam entering the turbine is superheated to800oF, calculate the efficiency of the cycle. Neglectpump work. Note:...
- Q 8. In a Rankine cycle steam enters the turbine at 900 psia and1000oF and exhausts at 1 psia. What is the thermalefficiency? Neglect pump work.State your answer as a percent...
- Q An ideal diesel engine uses air as the working fluid and operateswith a thermal efficiency ?th =0.5 with a rate of heat additionQin=120 kW. The temperature at the beginning and...
- Q (c) Draw a schematic graph of resolved shear stress versus shearstrain for a single crystal of a pure metal. Clearly label thepoint of the critical resolved shear stress and the...
- Q 5 example in industrial-valve in i/c engine
- Q What distinguishes scientific and experiential disciplines?a)Science is based on facts and is always right and cannot befalsifiableb)Scientific disciplines are more difficult to understand, teachand learnc)Experiential disciplines do not use the...
- Q One end of the straw is blocked by a finger when You pushed theother side of straw under water h_0 (m) and right after that fingeris removed from end of...
- Q # sensors for process nonitoring : cutting process..- Briefly explain the process ( first explain it un general andthen related with the sensor)-- I need it typing and clear and...
- Q In Finite Element Analysis (FEA) What is a localstiffness matrix and a global stiffness matrix?
- Q Draw a simple circuit to open and close a double actinghydraulic cylinder.
- Q Q11 a) What is the basis for piston rod design? Explain thesignificance of area ratio.b) List 4 of the likely causes for slow or erratic motion of anactuator in a...
- Q Mechanical vibration.Examples of forced damped oscillation with harmonic force.
- Q An oven may be regarded as a cube,each side 1.2m long. The oven stands on thin legs and the heattransfer through each of the six faces is identical. The walls...
- Q In the Injection Moulding Process, thicker parts are moresusceptible to shrinkage. Explain why this is the case.
- Q Acylindrical piece is shaped by a cold open die forging. The initiallength is 70 mm, and the diameter is 50 mm. The piece length willbe 40 mm at the end...
- Q This is problem 5-5 from El-Wakil’s Powerplant Technology book-- steam expands ideally in a turbine from 2500 psia and 1000degFahrenheit to 1 psia. Compare the maximum steam velocities andthe number...
- Q A CAT D&H (power-shift) dozer is used to push material thatweights 87 pcf in the bank state. It is estimated that the materialwill swell 5% from a bank state. The...
- Q Using the given lead-tin phase diagram for an alloy content of80 wt % Sn and a temperature of 100 C (a) what is the primary phase(b) what are the mass...
- Q Instead of the control-volume formulation, such as the Reynoldstransport theorem (Eqs. 11.5 and 11.6 of WMD), please consult fluidmechanics textbooks such as “Viscous Fluid Flow†by F.M. White(Chapter 1 &...
- Q A shell and tube type of heat exchanger with one shell pass andtwo tube passes will be designed to provide the given heat transferrate Q(kW) to cool hot water by...
- Q I want an example of the kinetics of rocket with FBD whichcalculate the curvilinear motion and rectilinear motion
- Q Saturated water vapor at 300F enters a compressor operating atsteady state with a mass flow rate of 5 lb/s and is compressedadiabatically to 750 psi.Determine:a) The percent isentropic compressor efficiency.b)...
- Q You are the test engineer responsible for the final productiontesting of an automobile (VW Golf R 2018) - create a list of testswith specifications as well as a block diagram...
- Q In regards to the Injection Moulding Process. Explain whythicker parts can be more susceptible to shrinkage ,suggest twomethods to reduce the shrinkage for a given component geometry?
- Q Why does shrinkage occur in the injectionmoulding process?You can use diagrams to assist with your answers if youlike.
- Q Explain how the processing parameters for INJECTIONMOULDING can influence the tensile strength for agiven polymer, explain this in terms of polymer properties.
- Q In regards to the Injection Moulding Process, discuss whichpolymer properties influence the MFI (melt flow index) and how theindividual polymers MFI is related to the various processingparameters for injection moulding....
- Q Identify the key steps in the injection moulding process,explaining how and why temperature, time and pressure are importantin each step.
- Q You are starting a new job at a plant that makes computerboards. You  are responsible for putting the componentson the board and also to do soldering.   What should yoube oriented on?...
- Q Quesiont is'Explain Luder's band in detail. Make reference to the yieldpoint, dislocation motion and solute atoms'
- Q Define any two (i) PVC (ii) Glass Transition Temperature(iii) LDPE and (iv) Thermoplastics
- Q A double-pipe heat exchanger is designed as an engine oilcooler. The flow rate of oil is 5 kg/s, and it will be cooled from60°C to 40°C through annulus (ID =...
- Q For a eutectoid steel, describe isothermal heat treatments thatwould be required to yield specimens having the following tensilestrength-ductility (%RA) combinations:(a) 900MPa and 30% RA(b) 700MPa and 25% RA
- Q What is the difference between superalloys and high-temperaturestainless steel?
- Q What are the materials used in an airplane engine forhigh-temperature purposes?Explain the reason for using each material.
- Q What are the most common alloying elements used in stainlesssteel materials?What are the effects of each alloying elements on steel?
- Q (Maintenance Engineering) In assigning job priorities, it isimportant to consider some factors like
- Q A squared cross- sectional bar of 3cm by 3cm is under acompressive stress of 300 MPa. The bar deforms elastically, what isthe area of the cross section after deformation. Provide...
- Q Compare and contrast the relative merits and demerits ofReactive maintenance and Predictive maintenance.
- Q Consider the following combined cycle. The mass flow rate of airis 73 kg/s. Air enters the compressor at state 1 with Patm =1 atmand Tamb = 20°C. The compressor has...
- Q 4-) Given the following data:Drilling Fluid Density : 12 ppgWell Depth: 10,000 ft.Drill Bit Nozzle Sizes: 13-13-13Pump Horsepower: 1800Pump Volumetric Efficiency: 80%Maximum Pump Pressure: 4,500 psiMinimum Flow Rate: 350 gpmParasitic...
- Q Design a cam for a rise-return-dwell (RRD) application using thefourth order polynomial. The position, velocity, and accelerationshould be zero at the beginning of the rise h, and the velocityshould be...
- Q 2. A Carnot cycle using water as the working fluid operateswithin the wet region (saturated conditions). If the high pressurefor the process is 500 psia and the low pressure is...
- Q Calculate the entropy production for the piston-cylinderpower producing cycle you analyzed in Problem 1. Consider that allheat flows into the system come from a constant temperature sourceof 1800K and that...
- Q 1.      Air enters aconverging-diverging nozzle with a total pressure of 1100 kPa and atotal temperature of 127°C.  The exit area to throat arearatio is 1.8.  The throat area is 5cm2.  The velocity at the...
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