Mechanical Engineering question and answers for July 16, 2023
- Q A 5 kW split-phase motor running at 1750 rev/min is used todrive a rotary pump, which operates 24 hours per day. An engineerhas specified a 200 mm small sheave, and...
- Q Justify selection of a non-destructive testing method to be usedfor inspection of welds on a 3m high 2m diameter steel storage tankon a remote worksite.
- Q how would you manfacture a 1mm hole 200mm deep and inside ametal block? (process) (introduction to manufacturing ,1st yearengineering)
- Q Which type of process does the equation dQ= T dS hold?A.reversibleB.isothermalC.isobaricD.irreversible
- Q 1. a) Make sketches to differentiate between microstructures incastings generated by homogeneous and by heterogeneous nucleation.What sort of structures provide the best mechanical properties?b) For a simple binary alloy exhibiting...
- Q Design fins/convection enviornment to remove 27 W/cm2from a square copper surface (50x 50 cm) while keeping the surfaceat a temperature of 80oC or below. The convectionenvironment has a bulk temperature...
- Q Explain why glass fiber are very strong in tension and bulkglass generally is not.
- Q Give an example of a stress state where Mohrs circle degeneratesto a point.
- Q Name or describe in some detail a technique that can be used todetermine the elemental composition of surfaces. YOU SHOULD mentionone technique and write more details about it
- Q QUESTION 1In the case of arbitrary planar curvilinear motion the bestchoice for coordinate system is tangential-normal systemA.yesB.noQUESTION 2Tangential coordinate axis is selected so that its positivedirection is in the direction...
- Q Manufacturing Processlist the similarities and differences between direct extrusionand drawing.
- Q Natural gas consists of a mixture of several gases. One exampleis 84% methane, 14.8 ethane, 0.7% carbon dioxide and 0.50% nitrogenby volume. Calculate the specific heats, the molecular weight andthe...
- Q A cast aluminium-silicon alloy containing 12 % silicon whichcannot be age hardened would normally solidify with ahyper-eutectic structure. This alloy can be used for bothsandcasting and metal die-casting. Describe THREE...
- Q From the expressions we derived for the kinetic theory of gases,it can be shown that the fraction of gas molecules having speeds inexcess of a particular speed c isf(c) =...
- Q Write the lay-up in proper composite lay-up notation. 45 Fabric(fiberglass); 0 (Carbon fabric); 0 Tape (Carbon); 0 Tape (Carbon);90 Tape (Carbon); +45 Tape (Carbon); -45 Tape (Carbon); +45 Fabric(Carbon); -45...
- Q State the Bragg’s law and how it is used for X-ray analysis.State the advantages of the field-emission electron gun over thetungsten electron gun.State the functions of electromagnetic lenses in anSEM/EPMA.If...
- Q Subject: Heat exchanger LabQuestion:1.1) in heat exchanger analysis, the following quantities areused. Explain what each means and givea formula for each. Assume the mass flow rates, fluid properties,inlet, temperatures, and...
- Q 1. (a) Outline the principles and essential differences betweenContinuous Cooling Transformation and Isothermal TransformationDiagrams  (b) Using the TTT diagram for a plain carbon steelwith 0.53%wt C, define the nature of...
- Q Water vapor at 800 lbf/in.2, 1000 F enters a turbine operating atsteady state and expands adiabatically to 2 lbf/ in.2, developingwork at a rate of 490 Btu per lb of...
- Q 1. Water at a flow rate of = 0.25 kg/s is cooled from 70 C to 30c by passing it through a thick-walled tube of internal diameter ofDi =50 mm...
- Q In the discussion for fatigue up to this point we have talkedabout the damaging effect of the number of cycles of loading but wehave not discussed about frequency (i.e. how...
- Q Describe all processes in Otto cycle and Diesel cycle and plotits P-v and T-s diagram respectively
- Q 1. How much energy(kJ) is required to vaporize 10 kg of water at500 kPa?2. What is the state of water of 150 deg Celcius and 415.7kPa?
- Q A 150-mm-wide polyamide F-1 flat belt is used to connect a50-mm-diameter pulley to drive a larger pulley with an angularvelocity ratio of 0.5. The center-to-center distance is 2.7 m. Theangular...
- Q An Inertial Measurement Unit (IMU) is an important sensor usedin aerial robotics. A typical IMU will contain an accelerometer anda rate gyro. Which of the following information does a robot...
- Q Discuss the impact of contemporary robotics locally, regionallyand globally
- Q Calculate the expected life of N (# of cycles) in a compressionspring with the specifications.Material: 302 Stainless SteelEnd type: closedOverall Length: 2\"OD: 0.5\"ID: 0.406\"Wire Diameter: 0.047\"Wire Shape: RoundCompressed Lenght: 1.35\"Maximum...
- Q a.If you see a white, powdery deposit on a surface, what does itmean to the component?b.Why does intergranular corrosion reduce the strength of acomponent and does thisaffect airworthiness of an...
- Q a.What are the main types of corrosion concerning aircraft?b.What is the main difference between corrosion in steel andaluminum?c.Why is humidity critical for Filiform corrosion?d.What is meant by stress corrosion and...
- Q a ) The moment of inertia of a rigid body, of mass 40 kg, aboutan axis through a point at 0.5 m from the mass centre, is 110kg.m2. What is...
- Q A section of pipeline is being lowered from a vessel to thesea bed. Assuming that the section of pipe is vertical whilst it isbeing lowered, at what point in the...
- Q In regards to the subject of Vibrations: Equations of Motion maybe formulated using Newton’s Second Law force and moment balance orLagrange’s Equations. Briefly discuss how to decide which method touse.
- Q Mechanical systems must usually operate over a range ofconditions. Unfortu- nately, one or more resonance points may haveto be passed through during sys- tem startup to operating state orduring system...
- Q Briefly explain the steps, tools, and techniques that you wouldtake to analytically investigate a vibrations problem.
- Q How do you determine whether or not to consider transientsolutions in the investigation of a vibration problem?
- Q a throttling calorimeter is used to determine thequality of a saturated mixture of steam. if steam expands through athrottling calorimeter from4mpa to 100kpa and 160 degree c.determine the quality of...
- Q In a gas turbine plant, air is compressed through a pressureratio of 6 from 15 ?C. It is then heated to the maximum permissibletemperature of 750 ?C and expanded in...
- Q theoretically designing a turbo propeller engine with a static power output of 500kW.
- Q A combustion process consumes 1.25 g/s of fuel. The fuel has aheat of combustion of 45 MJ/kg.The air flow rate is 19 g/s and the air enters the engine at...
- Q The internal energy value is ____________ that the enthalpyvalueA) smaller or equalB) lager or equalC) can be equal ,smaller or larger
- Q A solar cell module 100 cm x 50 cm which generate power 100 Wpeak per module. Solar power plant planned to generate electricalpower to a village with 50 houses. If...
- Q Use the False Position method to find a guess of the root off(x) = cos(x2 ) with lower and upper bounds of 0 and 2,respectively. Then, narrow the interval and...
- Q shear and bending moment drawing for mechanical ofmaterials.
- Q 3c) List and explain why AISI 1050 Plain Carbon Steel is moreprone to cracking and distortion as compared to AISI 01 Tool Steelduring hardening heat treatment.remarks: For the question above,...
- Q A racquetball court is 40 ft long by 20 ft wide by 20 ft high.Express the volume of the racquetball court in ft^3, m^3, in^3, andgallons.
- Q Briefly list and discuss all of the structural components, andlayout, found in the fuselage of a Boeing 747-300/400. Including,but not limited to, cockpit, hatches, doors, or other openings, andany ancillary...
- Q Write a three page report on the recent advancements in the areaof plasma in engineeringThe paper will be in 12 point times new roman single spaced andwill be three pages...
- Q Develop the formula for friction factor ‘f’. Keeping in mind theRe# should always be in turbulent region. What value of D should beselected to get turbulent flow. Start the value...
- Q Humid air at 300 kPa, 10°C, and 90% relative humidity is heatedin a pipe at constant pressure to 50°C. Calculate the amount ofheat, in kJ/kg dry air, required
- Q The flowrate for water traveling through a horizontal 300 m-longcast iron pipe with a diameter of 0.6 m and a pressure drop of 17.2kPa is to be found. P.S. use...
- Q In a gas turbine of a thermoelectric plant a regenerator is usedthat preheats the air before it enters the combustion chamber. Youhave the options of a backflow heat exchanger or...
- Q The paper rolls, shown in the figure below, are 0.9 m OD x 0.22m ID x 3.23 m long and have a density of 984 kg/m3 . The rolls aretransferred...
- Q Ethane (C2H6) is burned with air in asteady-flow combustor. The mass flow rate of fuel entering thecombustor is 0.57 kg/s and the equivalence ratio is 0.64. The fuelenters at 25oC...
- Q Ethane gas (C2H6) is burned with air. Thefuel flow rate is 0.1 kg/s and the air flowrate is 2.2 kg/s.Ethane’s enthalpy of formation is -84,680 kJ/kmol. Determine:The equivalence ratioEthane’s lower...
- Q a .25 mm diameter wire .2 m long is to be held at 1035 deg C.The wires surface is black. how much electrical power is requiredto maintain it's temp? The...
- Q Q2 Write short notes on any two of the following:a) Optimum Design. b) New Design c) Empirical Design [12 marks](iii) Mention two methods used in design in minimizing stressconcentration. [5...
- Q Explain how tacticity (isotactic, atatic) effect the moleculescrystalinnity and other characterstics.
- Q Question 3 a)In an Electrochemical Machining process, thefeedstock is made of an aluminium alloy (Ultimate TensileStrength=572 MPa, Tensile Yield Strength=503 MPa). The desired timeto machine a hole (?=10 mm) through...
- Q Briefly explain the following terms:a)Exiting phenomena(drilling)b)Sparkling out process(grinding)c)Six point rules
- Q 1045 Steel (quenched specimen)Draw a picture of what you think the microstructure would looklike and label the constituents (martensite, ferrite, cementite orwhatever you expect to find in this quenched specimen)....
- Q Iron ores found in Ireland and Britain are not suitable forproduction of high-quality steel because they contain too much ofwhich one of the following elements:(a) Sulphur(b) Carbon(c) Nitrogen(d) Phosphorus?The inside...
- Q Capillary number is proportional to { (viscous force) / (surfacetension force) } and is used in momentum transfer in general andatomization and 2-phase flow in beds of solids calculations inparticular....
- Q Give three examples of materials properties, and indicate wherethey are used in engineering product development. Compare any oneof the listed properties for Metals, Ceramics, and Polymersmaterials on the same scale...
- Q A circumferential aluminum fin is attached to an electronicresistor having 1/4 inch diameter. The fin is 1/8 inch long and.001 inches thick. The convective heat transfer coefficient to thesurrounding media,...
- Q A two-pass shell and tube heat exchanger has an overallconductance of 450 W/m2 oC when used as a condenser fora large air conditioning system. Refrigerant R-134a entersthecondenser at 20 kg/...
- Q Explain the principle of a critical radius when adding isolationto pipes
- Q Sailplanes use updrafts to stay aloft for hours at a time. Nearone particular airfield, a stone quarry (with very dark rocks)surrounded by a wooden area provides a particularly regular sourcefor...
- Q With your knowledge of heat transfer, explain how birds regulatetheir temperature
- Q Compute the elastic modulus for the following metal alloys,whose stress-strain behaviors may be observed in the \"TensileTests\" module of Virtual Materials Science and Engineering (VMSE):(a) titanium, (b) tempered steel, (c)...
- Q What is steady-state error? What is the type of the system?What is the steady-state error of type 0, type 1, and type 2systems for step signal, ramp signal, and parabolic...
- Q A refrigerator with a cooling capacity of 5 ton uses ammonia asthe working fluid. The condenser and evaporator maintain a pressureof 1500 kPa and 200 kPa respectively. The compressor has...
- Q Give me the refernces pleasewhat is the maximum? temperture and minimumfor Airbus 320-200 ? Give me the referncespleasewhat is the maxiumum speed and altitude? Give me the refernces pleasewhere is...
- Q The elevator starts from rest at the first floor of the buildingand comes to a complete stop at the 6th floor. It can accelerate at6 ft/s2 and then decelerate at...
- Q After additively manufacturing a part, many manufacturers willperform Hot Isostatic Pressing (HIP) to remove pores from thematerial. These pores form naturally as part of the process ofadditive manufacturing, and negatively...
- Q Using an iron-carbon phase diagram and the lever rule ,calculate the expected phases and volume fraction of each phase atroom temperature for the a) the 0.20 wt.% C steel and...
Get Answers to Unlimited Questions
Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!
Membership Benefits:
- Unlimited Question Access with detailed Answers
- Zin AI - 3 Million Words
- 10 Dall-E 3 Images
- 20 Plot Generations
- Conversation with Dialogue Memory
- No Ads, Ever!
- Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!