Mechanical Engineering question and answers for August 05, 2023
- Q Lets say that we are testing an engine that produces 17 kW ofpower. As this engine is operating, it absorbs 95 kW of heat fromthe surrounding air at 17 C....
- Q Explain the concept of shape functions and compare and contrast theshape functions for the different element types introduced in thismodule. Use diagrams as necessary. Relate this to the capabilitiesand limitations...
- Q Refrigerant 134a, initially (state 1) a saturated liquid at-80C, is contained in a piston-cylinder assembly. The waterundergoes a process to the corresponding saturated vapor (state 2),during which the piston moves...
- Q What are the Ethical and professional responsibilities of thepusher type system in the industry?
- Q Air passes through a jet engine nozzle operating at steadystate. The flow at the nozzle inlet has a temperature of 900° F.The nozzle inlet has an area of 5 ft2....
- Q A gas turbine expands air adiabatically at 1000 kPaand 550 â°C to 120 kPa and 130â°C. Air enters theturbine through a 0.25 m2 opening with an aveage velocity of 45...
- Q Â 1. Discuss Professional Responsibility of engineers in a situation of ethical dilemma. CLO1(2.5)Â 2. How individualism effect the situation when whistle blowing is going on? CLO2 (2.5)Â 3. Why safety is important...
- Q Making intricate and very small metal parts by casting is adifficult task. Suggest the casting technique for that and explainthe steps in that technique.
- Q Define the following items?1-Sensor; 2- Signal conditioner; 3- Zero error; 4-Accuracy; 5- Hysteresis;
- Q CO2: Explain the ethical duties and responsibilities ofengineers in society related to legal, management andentrepreneurship aspectsPO9: Apply ethical principles and commit to professional ethicsand responsibilities and norms of engineering practice
- Q List the high-level benefits of programming languagesand identify the particular language(s) which are most closelyassociated with each such specific benefit.
- Q Apply ethical principles and commit to professional ethics andresponsibilities and norms of engineering practice
- Q jubail college advertised two post1/ Lab technician2/ a teaching assistantWrite a job objective
- Q A vertical close coiled helical spring must have a stiffness of4,3 kN/m. The maximum shear stress of 130 MPa is induced by a loadof 720 N. With the spring fully...
- Q HW Problem 5: A 150 kW motor drives a hollow round shaft at1,200 rpm. The outer diameter of the shaft is 100-mm and the innerdiameter is 0.95*outer diameter. It is...
- Q To start a three-phase motor, three switches (A, B and C) arerequired in such a way that its operation occurs only under thefollowing conditions: • When closed only B •...
- Q Whats the difference between fracture surfaces of ductile andbrittle materials? Whats the effect of axial load verse torsionalload on the fracture surface of ductile and brittle materials.
- Q Air within a piston cylinder assembly executes a Carnotrefrigeration cycle between hot and cold reservoirs at TH=500 K andTC=300 K, respectively. The magnitude of the heat transfer rejectedto the high...
- Q Çapı 50 mm olan sabit kesitli bir borudan 1.5 m/s hızla suakmaktadır. Boru giriÅŸindeki etkin basınç 590 kPa’dır. Borununçıkışı, giriÅŸinden 25 m daha yüksekte ve atmosferbasıncındadır.(Ïsu=1000 kg/m3, g=9.81 m/s2)a) Borunun...
- Q A vapor-compression refrigeration cycle working with R22 contains a liquid-to-suction heat exchanger. The saturated liquid refrigerant at 40 ℃ leaving the condenser and enteringthe heat exchanger is used to superheat...
- Q Â Explain fibers and voids in a microstructure?
- Q An actual Rankine Engine turbo-generator receives steam at apressure of 10MPa and etropy of 6.931 j/kgK, the steam then expandsto 500kPa with a temperature of 250°C and leaves the condenser...
- Q Select a solid, rectangular, Eastern hemlock beam for a 5msimple span carrying a superimposed uniform load of 4132 N/m
- Q a. What is N-S equations for incompressible flows in cartesiancoordinates in long form (in x,y,z coordinates)?b. What is continuity equation and N-S equations forincompressible flows in polar coordinates in long...
- Q Question 22.1Â Â Â Â Â Â A brass rod of 25 mm indiameter is enclosed in a steel tube. The tube is 10 mm thick withan outside diameter of 50 mm. The bar and...
- Q Case Study In Francisco Automotive Manufacturing Plant, a largenumber of engineering activities are carried out in a wide range ofareas. These activities include design, production of parts,assembly, testing, and quality...
- Q In general, cutting heat in cutting operations mainly affectstool wear, whereas grinding heat in grinding operations has asignificant effect on the surface finish of the workpiece. Explainwhy this is so...
- Q An open forging die used to forge a cylindrical part with theinitial diameter is 45 mm and the initial height is 40 mm. Thecoefficient of friction at the die-work interface...
- Q case study related to \"lifting Hazards to human bodyin workplace\"
- Q Define the Reynolds number for pipe flow, film flow, annulusflow and particlemotion in a fluid.
- Q A syngas fuel consists of these following volumetriccomposition: 75% methane and 25% butane. The syngas at 100 kg/hourand 25 C is mixed with 20% excess air at 30 C. Due...
- Q Q1.a. List and discuss the three basic types of engineeringproduction.b. List the role of Quality Control and Inspection during themanufacture of a product.c. List any two reasons why automation is...
- Q A steam powerplant operating on an ideal Rankine Cycle isoperating at a boiler pressure of 5.75MPa, steamenters the turbine at500°C andexpands to 147kPa. If the powerplant is producing5MW of energy...
- Q A round composite bar is used to conduct heat. It is held at600K at one end and 1000K at the other end but all other surfacesare insulated. The two end...
- Q The system has zero -3, poles -2 ± j and gain 5.Please find the Transfer Function of the closed loop unityfeedback system.
- Q Discuss a technical problem you have experienced with a device,equipment or vehicle in form of a story (one paragraph).Note: you have to follow the problem solving checklist asfollows:1. User's observations-...
- Q 1. (USE MATLAB) Create a table using fprintf that shows theconversion from US Dollars to Yen, Euros, Mexican Peso, andCanadian Dollars. Use the internet to find the conversion factors.Prompt the...
- Q 1. A steam powerplant operating on an ideal Rankine Cycle isoperating at a boiler pressure of 5.75 MPa, steam enters theturbine at 500°C and expands to 147 kPa. If the...
- Q 4. Use music wire to make a series of springs withwire diameters [0.075â€, 0.080â€, 0.085â€, 0.090â€].Each spring should have a free length of 3†and rate of 50 lbf/ftand exactly...
- Q Design a double-dwell cam to move a follower from 0 to 2.5 in.in 60°, dwell for 120°, fall 2.5 in. in 30°, and dwell for theremainder. The total cycle must...
- Q NE 321 Nuclear Heat TransportSummer 2020Homework- 5Due: Â Â Q1) Derive the 2D unsteady heat conductionequation in Cartesian coordinates with heat generation and variableK.Q2) Derive the 3D unsteady heat conductionequation in Cartesian...
- Q The stress state on the inside flange of an aluminum alloy2024-T3 wheelhub is found to beσxx=−83 MPa,σyy=−145 MPa,σzz=−35MPa,σxy= 44 MPa,σxz= 0, .σyz=−22 MPa. What is the safety factorguarding against failure...
- Q Define Octane number and Cetane number?in 200 words
- Q heat transferThe double-glazed window with a height of 1.2m and a width of 2mhas a gap of stagnant air (k = 0.026W / m ° C) with a width of...
- Q  Task 2 – Subsequent MotionThe ball in Task 1 will then continue to bounce and rebound until it loses all energy. By first finding an expression for the maximum height...
- Q Can you give some important viva questions afterobserving these topics listed below?UNIT IProjections- projections of straight lines,planes and solids, section of solids.Isometric projection of solids.UNIT IIThreaded fasteners: Terminology, Screw threadsforms...
- Q At the beginning of the compression process of an air standardOtto cycle, p1 = 1 bar, T1= 300 K. The maximum temperature in the cycle is 2250 K andthe compression...
- Q Determine the heat transfer rate per unit width for a 1.1-m longplate with a surface temperature of 125°C for critical Reynoldsnumbers corresponding to (A) 105, (B) 5 x 105, and...
- Q Toflokpo-Crane is new company that specializes indesigning and manufacturing small-scale automatic jib cranes formoving heavy loads around a workshop or production lineenvironment. Their primary selling point is the integration ofneural...
- Q Explain the best technique to increase the impact resistance andovercome the cracking problem of nails and bolts during thequenching process. With the aid of sketches, briefly describe howto conduct this...
- Q Derive a finite-difference method for solving the non-linearparabolic equation using the Explicit MethodUt=v*Uxx-U*UxWhere v is the viscosity
- Q rewrite the below-working principle of hydraulicpower steering system in your own word with out missing the generalconcept of the principleIn this type of power steering system as we discussed above...
- Q A piston-cylinder apparatus contains argon at initial conditionsof 15 psia, 70F, and 0.30 ft3. The argon is thencompressed slowly and frictionlessly to a final pressure of 150psia. Heat transfer between...
- Q In a Porter governor, the mass of the central load is18 kg and the mass of each ball is 2 kg. The toparms are 250 mm while the bottom arms...
- Q In a hydraulic circuit, four double acting cylinders areconnected together in the circuit. When a 4/3-way directionalcontrol valve (DCV) is actuated manually by using lever, the firstand the third cylinder...
- Q Astemperature increases toward the critical temperature, the valuesof v_f and v_g become more far away from each other.
- Q A motor apply power 10-hp split-phase motor speed at 1700 rpm isused to drive a rotary pump, which operates 24 hours per day. Anengineer has specified a 7-in small sheave,...
- Q Given the “As Received†analysis of a coal:    Sulfur          =1.52%                 Hydrogen     = 6.36%    Carbon        =79.56%               Nitrogen       =1.42%    Oxygen        =5.02%                 Moisture      = 2.51%    Ash             = 6.12%Using the ASH AND MOISTUREFREE ANALYSIS OF THE COAL, calculate the following:a) Theoretical O/Fratiob) Actual...
- Q write the mathematical code in language fortran 77about Linda Hanson palstic cryocooler refrigerator using r407crefrigerant with moving coil magnet compressor technology thecompressor is used is scroll casing using r407c refrigerant...
- Q a viscous turbulent flow can be described by which equtions
- Q For a marine diesel engine application, a fluid-film journalbearing has a shaft diameter of 32 mm and the length of the bearingis 24 mm. The bearing uses SAE grade 20...
- Q In view of the product life cycle, consider the progression thatthe EV (electric vehicle) industry is undergoing by stage. Discussthe 4 P's for each stage within the EV product journey....
- Q NASA is sending a remote-sensing spacecraft to Mars.Given:Earth parking orbit altitude= 1000 kmMars Parking orbit altitude=  500 kmμEarth =  3.99x105km3/s2μMars =  4.280x104km3/s2μSun =  1.33x1011km3/s2Earth's orbital radius =   1.50x108 km (assume Earth has a circular orbit...
- Q All else being equal, for rolling element bearings, which ismore damaging?They are equivalent.outer ring rotation.Stop worrying--they're both fine!inner ring rotation.
- Q A jet of water 50 mm in diameter with a velocity of 20 m/sstrikes a flat plate inclined at an angle of 30° to the axis of thejet. Determine(i) the...
- Q After the experiment of Aluminum, Copper and Nylonspecimens, data shows that the tangent modulus is lower than theYoung's modulus.What does that physically mean?Are the specimens showing signs of softening or...
- Q The following data is provided for the spectral distribution ofthe radiation emitted by a diffuse surface.Elambda (W/m2 micrometer) = 0 for lambdabetween 0 and 5Elambda (W/m2 micrometer) = 100 forlambda...
- Q given and sketch in steps the root locuse of transfer function bymatlab and hand calculationG(s)=(s+3)/s(s+2)given solution please
- Q a rocket is moving along a curve with its equation given bys=2t^3-24t+s(s in meter and t in second).find the time required for the rocket to reach a velocity of 126m/s...
- Q The Space Shuttle is covered with special tiles which prevent it from burning up upon its return to the atmosphere. These tiles are made from Select one: a. CMC-type material b. PMC-type material c....
- Q The velocity of steam at inlet to asimple impulse turbine is 1200 m/s and the nozzle angle is 21°. Theblade speed is 500 m/s and the blades are symmetrical.Evaluate:The blade...
- Q 1. A thick metal plate (alpha = 3.5 x 10-6m2/s and k = 0.7 W/m-K), initially at a uniformtemperature of 100oC, is suddenly exposed to aconvection environment of water at...
- Q Discuss the difference between the ideal and the actualindicator diagrams of four stroke SI engine.
- Q Identify five mechanical properties of materials which can beused to describe their behaviour as a result of applied externaland internal forces. For each of the properties youidentified,answer the following questions:a....
- Q 7.11 Consider two cases involving parallel flowof dry air at V = 1 m/s, T∞ = 45°C,and atmospheric pressure over an isothermal plate atTs = 20°C. In the first case,Rex,c...
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