Mechanical Engineering question and answers for August 08, 2023
- Q The composite wall of a building consists of a 100 mm layer ofcommon brick, a 100 mm layer of glass fibre (organic bonded), a 10mm layer of gypsum plaster (perlite...
- Q R-134a expands through a throttling device from 900 kPA and 30oC to -10 oC.a- determine the entropy generation of this process.b- the working fluid R-134a, this time expands adiabaticallythrough a...
- Q A 1-m-diameter cylinder, 1 m long, is maintained at 800 K andhas an emissivity of 0.65. Another cylinder, 2 m in diameter and 1m long, encloses the first cylinder and...
- Q What are the major source of emissions in power plant and howcan we reduce it?
- Q a) Discuss the heat generation mechanism in electric arc weldingand oxy-acetylene gas welding.b) Discuss the generation of neutral, reducing and oxidizingflame in gas welding along with the application of each...
- Q Sirius has a mass of 2 solar masses and radius of 1.71 solarradius, determine averagedensity of Sirius.a) pressure at half radius of Sirius b) temperature at halfradius of Sirius c)...
- Q A 400-W cylindrical resistance heater is 1 m long and0.5-cm-diameter. The resistance wire is placed horizontally in afluid at 20â—¦C, flowing at a velocity of 20 m/s. Determine the outersurface...
- Q When is a pressure operated valves used?Sketch a non-compensated flow controlvalve.i) Differentiate the non-compensated and pressurecompensated valve.ii) Name 2 example of flow control valve used inindustry.
- Q Compare the Otto cycle, Diesel cycle, and Stirling cycle.a: Draw the P-v diagrams and label all the processes.b: Draw the corresponding T-s diagrams for the three powercycles and label all...
- Q What is intrinsic and extrinsic workability?
- Q Explain how the compressibility and shock wave generationaffects the design of fighter jets.
- Q Metallurgy question:What is the most important properties ofthese materials ( Lead, tin, Silicon, Arsenic)?
- Q For a BCC iron-carbon alloy that contains 0.23 wt% C, calculatethe fraction of unit cells that contain carbon atoms.One carbon atom per  ? unit cells.
- Q (1) Describe briefly the definition of fully developed laminarflow.(2) From governing laws for fully developed laminar flow, derivean equation for fully developed laminar flow that shows therelation between flowrate and...
- Q Steam at 5mpa and 300C enters a turbine in a steady flow manner,from the turbine the steam expands to 200 kpa with a quality of90%. FInd the ff:a. The work...
- Q Problem10-3A helical compression spring is wound using 2.5-mm-diameter music wire. The spring has an outside diameter of31mm with plain ground ends, and 14 total coils.(a) Estimate the spring rate.(b) What...
- Q 15 -The difference between the absolute pressure and the localatmospheric pressure is ……………. .A)Vacuum PressureB)Atmospheric PressureC)Gage PressureD)Specific PressureE)Absolute Pressure
- Q A rigid tank with a volume of 20 litres initially contains waterat 0.1 degree of dryness and a pressure of 175 KPA. A steamdisposal Valve is located at the top...
- Q Search 5 pages about ( truncation errors and Taylor series )contains Abstract, Introduction, Discussion, Conclusion, andReferences
- Q Describe the conduct of a typical creep test
- Q A mass of 0.3 kg of saturated refrigerant-134a iscontained in a piston-cylinder device at 240 kPa.Initially, 70 percent of the mass is in the liquid phase. Now heatis transferred to...
- Q which materials are best for heat exchangers.I want to know everything that heat exchanger depends on likereynolds no., thermal conductivity, friction factor, etc.,please explain everything of dependency of heat exchanger.
- Q 5. Identify any THREE hazards associated with the weldingprocess.6. What is difference between consumable and non-consumableelectrodes? Identify one welding process that employs a consumableelectrode and one that employs a non-consumable...
- Q A weighted piston-cylinder device (pressure is not constant)initially contains 1.2 kg saturated liquid water at 190oC. Now heatis transferred to the water until the volume quadruples (increasefour times) and the...
- Q Derive the constitutive model for a viscoelastic model thatconsists of a Voigt element (E1 for spring, and η for dashpot) inseries with a spring (E2).Now rearrange your expression so that...
- Q A vapor-compression refrigeration cycle working with R22contains a liquid-to-suction heat exchanger. The saturated liquidrefrigerant at 40 °C leaving the condenser and entering the heatexchanger is used to superheat the saturated...
- Q An animal in our JunglePark application needs to check whetheranother animal is in its neighborhood (close to it). To implementthis behavior, add isClose() method to the Animal base class andimplement...
- Q Answer the following question.Describe an electro-mechanical machine. How do the systems worktogether to achieve a common goal?
- Q Q5 : A PV module is installed in Baghdad city on (19 January)with slope angle (33.3o) equal to the latitude and facing (19o)west of south. At 12 PM, calculate the...
- Q design and develop a miniature cryocooler in FORTRAN77 software and validate it's result with EES AND fluent......everything is well defined dont worry...you can skipit....
- Q Part B. The worm shaft shown in part a of the figuretransmits 1.2 hp at 500 rev/min. A static force analysis gave theresults shown in part b of the figure....
- Q            For the metal matric composite above, determine the specificstiffnesses under (a) longitudinal and (b) transverse loadings. Thefiber and matrix specific gravities are 8.29 and 6.08. Report theresult in GPa.                                  For the...
- Q Consider a clocked synchronous state machine with two inputs, Aand B, and a single output Z that is 1 if(1) A had the “same†value at each of the “three“...
- Q Discuss the role and implementation of Material Control andAccountancy in the context of nuclear safeguards. Describe thepurpose, use, and implementation of Key Measurement Points (KMP)and Material Balance Areas (MBA).
- Q discuss the limitations of design wings of MAV aircraft by usingFoilSim and Airfoil?
- Q saturated humid air at 1 atmosphere and 10 degreesCelsius is to be mixed with atmospheric air at 1 atmosphere, 32degrees Celsius and 80 percent relative humidity, to form air of...
- Q Air (Cp = 1.005 kJ/kg · K) is to be preheated by hot exhaustgases in a cross-flow heat exchanger before it enters the furnace.Air enters the heat exchanger at 95...
- Q The piping system that delivers water to the second floor ofyour house, at an elevation of 16 feet from the ground, consists of22 feet of 0.75\" ID (ID = Internal...
- Q • Write the Conservation of mass equation as it applies TO YOURSYSTEM• Write the Conservation of Energy equation as it applies TOYOUR SYSTEM• List all the assumptions and idealizations for...
- Q Q2/ Superheated steam enters convergent divergent nozzles at (2MN/m²) and ( 325 C°) with mass flow rate (7.5 kg/sec ). It isexpand according to (PV 13= C) through the nozzles...
- Q What is the difference between dual duct and multizoneair-conditioning systems? Which one provides more temperaturevariation across the zones and which one is economical tooperate?
- Q PROJECT4 : DESIGN A HYDRAULIC MOBILE CRANEREQUIREMENTS:•Design the system to carry load of up to 5000 lb•Use a hydraulic winch(rotary actuator)to move the pulleys upand down•Use fail-safe measures to support...
- Q It is required to maintain the air in a building at 20oC and 40%saturation when theoutside conditions are 28oC, 50% saturation with a barometricpressure of 1.01325bar. The total heat gains...
- Q Q1 : A cascade refrigeration system is designed to supply 10tonnes of refrigeration at an evaporator temperature of -40°C and acondenser temperature of 36°C. The load at -40°C is absorbed...
- Q a) There are different ways of categorizing the wide variety ofavailablejoining processes. According to classification by the AmericanWeldingSociety (AWS), joining processes fall into three major categoriesi.ewelding, adhesive bonding and mechanical...
- Q Q3) Three methods of supplying a 100 000 MJworkload and a 300 000 MJ heat load to a new shopping mall are tobe compared. Work in the form of electricity...
- Q At130°C, a bronze hoop 20 mm thick whose inside diameter is 600 mmjust fits snugly over a steel hoop 15 mm thick. Both hoops are 100mm wide. Compute the contact...
- Q what can you say about newtons law of viscosity andpascals law ???
- Q ?? / ? = (?? - ?) ?? / ?Since it is;a) By mathematical analysis, show which Mach number the criticalsection will be.b) In which nozzle does the critical section...
- Q QI: Choose the appropriate answer A, B, C, or D (25point) 1- In the open loop transfer function, what is therelationship between input and output signals? (A) Output does notdepend...
- Q design and perform your experimentation and evaluatethe energy storage performance of these sensible heat thermalenergy storage system natural number friction factor are to befound using friction and Reynolds number and...
- Q A solid cylindrical shaft, 3 in. dia. 20 in. long, is used forthe transmission of mechanical power at a rate of 50 hp running at1300 rpm. The modulus of rigidity...
- Q Assuming you are new engineer working in R & D division atmanufacturing company which has decided to evaluate CAD/CAM systemto adopt in your company in order to meet Industrial 4.0....
- Q A 4 ? edge bucket with a 1.5 ? opening at the right end of thelid contains 48 ?3 of water. If the cube experiences a horizontalacceleration of 14,715 ?...
- Q Motor sizing decision must consider 3 factors; stall torque, noload speed and maximum power. With the help of motor performancechart, please discuss them in detail.
- Q The levels of combustible species in the exhaust of adirect-injection diesel engine are: HC, 0.8g/kW.h; CO, 3 g/kW.h; particulates, 0.7 g/kW.h. If the specificfuel consumption is 210g/kW. h calculates the...
- Q Water at 60 ∘C is pressurized in a pump from 90 kPa to 1600 kPa.If this requires 2.4 kJ for every kg of water that moves throughthe pump, then what...
- Q I need a mathematical model governing the mechanism ofair source heat pump with split evaporator connected with bryairdehumidifier for water heating and space coolingapplication....draw a schematic arrangement using AutoCAD anddevelop...
- Q â€1. The impeller in a centrifugal pump has inner diameter as125 mm and outer diameter as 270 mm. The pump runs at 1400 rpm. Thevane angles of impeller at inlet...
- Q A 75â€mmâ€diameter orifice with D and D/2 taps is used to measurethe flow rate of 65°C water in a 150â€mmâ€ID pipe. Determine thepressure difference for a flow rate of 20 L/s
- Q A gas refrigeration cycle with a pressure ratio of 4 uses heliumas the working fluid. The temperature of the helium is -6°C at thecompressor inlet and 50°C at the turbine...
- Q Set up a study about tensile testing indicating its effect onselecting materials for design applications.Including introduction, results , conclusion andrecommendations.
- Q The atmospheric air 32 °C dry bulb temperature and 70% relativehumidity supplied to the cooling coil at a rate of 45m3 /min. Theair cooling to the saturated state and leaving...
- Q 3. Safety is one of the most important concerns in anyoccupational environment particularly in process industries.a. What the main things that a safety training program foroperators should involve b. What...
- Q Please post a rough draft of your Research Proposal
- Q A turbo fan blades of an airplane is made from hard materialwhich is titanium.a) Suggest the most suitable non-traditional machining processthat can be used to produce the turbo fan bladesb)...
- Q Indicate whether the following statements are true orfalse. Explain.Rate of energy transfer induced as a result of a temperaturedifference between a system and its surroundings is called apower.When a system...
- Q how to calculate a shaft diameter of horizontal wind turbine
- Q You are using a silver spoon to stir water that just startedboiling so that you can achieve a more even heat distribution inyour water. The spoon is partially immersed in...
- Q Write down the reasons why motors draw overcurrent from themains and the names and protection types of motor protection relaysused against this risk.COMMAND AND POWER CIRCUIT IS A WHOLE IN...
- Q Water is to be heated from 12â—¦C to 70â—¦C as it flows through a 2centimeter internal diameter, 7 meter long tube. The tube isequipped with an electric resistance heater, which...
- Q Consider a steam power plant that operates on a reheat Rankinecycle and has a net power output of 80 MW.Steam enters the high-pressure turbine at 10 MPa and 500°C and...
- Q A new refrigerator is being designed. Magnets will be used tohold the door closed, and the rubber seal thickness can be selectedto adjust the separation between the magnets (and therefore...
- Q A ship is fitted with six-cylinder CI engine of 75 mm bore and100 mm stroke. The engine has a brake power output of 110 kW at 370rpm. The volumetric efficiency...
- Q Sketch and describe the working of a Locomotive boiler. Showthepositions of fusible plug, blow off cock, feed check valve andsuperheater.Mention the function of each. Describe the method of obtainingdraught inthis...
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