Mechanical Engineering question and answers for August 14, 2023
- Q Your newly purchased house where you are aiming for an indoortemperature of 18.0°C is well insulated apart from a 5.0 cm thick12m² wooden wall facing the garage. Typically, the garage...
- Q Q2. A shaft carries four masses A, B, C and D ofdifferent magnitude and revolving at radii as mentioned below inplanes measured from A at 300 mm, 400 mm and...
- Q Describe how to cut a thread on a lathe, using freehand sketch.What is the relative motion between the tool and the work part.
- Q The ethanol-water mixture is separated on a distillation column. Feed contains 20% ethanoland 1000 kmol / hour speed is entering the system. The feed temperature is 30ºC and its enthalpy...
- Q 2. Based on initial guesses, a mesh for a CFD simulation isset up for an external ow around an object. Theow does not experience signicant separation on the body surface.The...
- Q How does turbulent intensity change according to 4 strokeengine’s cycle? What are some bulk motion you can do to increasethe turbulent intensity?
- Q Describe in simple terms how an XRD instrument can be used toperform a residual stress analysis of a strained steel sample. Whatneeds to be measured, and how are the measurements...
- Q A batch production operation has a machine setup time of 4.0 hrand a processing time of 1.50 min per cycle. Three parts areproduced each cycle. No tool handling time is...
- Q An intermediate pressure steam turbine is to bedesigned with 7 repeating stages as described above. The inletconditions are: total temperature = 550°, total pressure = 4.0MN/m2. The exit total pressure...
- Q Scenario 2: Hunter Molding Machine (Machine Guarding)While operating a Hunter molding machine, it is necessary for asingle operator to reach inside the machine to adjust the patternor blow it off...
- Q Two kilograms of air is stored in a rigid volume of 2 m3 withthe temperature initially at 300°C. Heat is transferred from theair until the pressure reaches 120 kPa. Calculate...
- Q A flat plate solar collector with no cover plate has a selectiveabsorber surface of emissivity 0.1 and solar absorptivity 0.95. Ata given time of day the absorber surface temperature ??...
- Q Find the general solution for the following ODEs. If initialcondition is given, solve the initial value problem.3) (D^4 − 13D^2 + 36I)y = 12e^x4) (D^3 − D^2 − D +...
- Q Q.3) Suppose (y, z) plane forms the boundary between anonconducting linearmedium (1) and a conducting medium (2). A monochromatic plane wavetravelingin the x direction and polarized in the y direction...
- Q A straight cylindrical pipe (içi boş boru) lying along the xaxis has a length of L and inner diameter of R1 and outer diameterR2. It is made of a material...
- Q Acetylene gas (C2H2) with 20% excess air, fully in continuous regimeincinerated. Air and fuel, separate to the combustion chamber, separate temperature of 250C and 1 atmunder pressure and under reaction,...
- Q The net power of a steam power plant operating according to thesimple ideal Rankine cycle is 30.5 MW. Water vapor enters theturbine at 7 MPa pressure and 500 ° C,...
- Q Refrigerant R-134a enters the compressor of a refrigerationmachine at 140 kPa pressure and -10 ° C temperature and exits at 1MPa pressure. The volumetric flow of the refrigerant entering thecompressor...
- Q The pressure ratio of a Brayton cycle with air operatedregenerator is 8. The lowest and highest temperatures of the cycleare 310 K and 1150 K. The adiabatic efficiency of the...
- Q a=2 b=1A bullet is to be tested in the laboratory to determine the dragforce on it. Dependent parameter the drag force D (Newton) dependson the velocity of the bullet V(m/s),...
- Q The compression ratio of an ideal air-powered Diesel cycle is20. At the beginning of the compression process, the pressure ofthe air is 100 kPa, the temperature is 20 ° C,...
- Q Vibration absorbers are used in railroad cars toprotect sensitive loads from large acceleration due to periodicexcitation given by rail links. For certain trains, the railconnection is 5 m. The car,...
- Q You are invited to give a talk to SPM students who wish tochoose their future career in engineering field. As a youngengineer graduated from UPNM, you are being selected to...
- Q A 6.2-mm-diameter electrical transmission line is exposed towindy air. Determine the drag force exerted on a 165-m-long sectionof the wire during a windy day when the air is at 1...
- Q Course : Heat Transferquestion 3a-) In heat transfer by radiation, describe theswallowing,reflection, passing coefficients, write down therelation between them.b-)Write the expression radiative heat transfer between twosurfaces with different areas in...
- Q Show that 2D potential flows satisfy Euler’s equations even if μ≠0.
- Q 1. Mention fundamental differences from the Auto Pilotsystem, Stability Augmentation System, and Command AugmentationSystem?2. State the fundamental differences between theHydro-mechanical Assisted Control System and the Hydro-mechanicalPowered Control System?please this answer
- Q Question 1) Water at 20 C flows through a galvanized pipe at anaverage speed of 2.5 m / s. The diameter of the pipe is 150 mm. Theroughness of the...
- Q 1.Why is the hole missing ?•Operator error.2.Why did the operator make the error ?•He wasn’t inspecting the parts as required.3.Why wasn’t he inspecting the parts ?•The supervisor told him we...
- Q 1) Give 3 methods to determine machining time.2) What is the difference between process optimisation andeconomic.3) From your understanding, would the costing calculation makedifference from one machining process to another.Why?
- Q 1.Why is the hole missing ?•Operator error.2.Why did the operator make the error ?•He wasn’t inspecting the parts as required.3.Why wasn’t he inspecting the parts ?•The supervisor told him we...
- Q A steel drill rod that is 10 mm in diameter and 20 cm long isbeing heat treated in an oil bath. The 1050°C rod is quenched andheld at 700°C and...
- Q Combustion gases with an average specific heat ratio of k=1.33and a gas constant of R=0.280 kJ/kgK enter a 10-cm-diameteradiabatic duct with inlet conditions of Ma1=2,21 T1=521 K, and P1=182,1 kPa....
- Q A mass of 0.07 kg of air at a temperature of 30°C and pressure100 kPa is compressed to a pressure of 600 kPa, according to thelaw:(i.e. Polytropic process, n=1.3). Determine:i.The...
- Q FLUID MECHANICSAn aircraft flying at an altitude of 5 km with a Mach number of0.15.Calculate the velocity of the aircraft? (+1 point)Calculate the pitot tube measurement reading at the nose...
- Q A cast iron saucepan of mass 4.4 kg is filled with 20 L of waterat 25 °C, placed on an electric hotplate, and initially brought upto boiling point. Further heat...
- Q In an Otto cycle air is compressed from an initialpressure 120 kPa and temperature 370 T (K). The cycle hascompression ratio of 10. In the constant volume heat additionprocess 1000...
- Q Briefly Discuss the attributes (max ofthree) of Product lifecycle Stages in Design and Manufacturing.Please limit yourself to one paragraph, max 6 lines. Pleaselist attributes separately as items 1, 2 and...
- Q In an intermediate superheated steam cycle, water vapor is 4 MPapressure, 440 oC high, isentropic and 0.80 highAfter entering the pressure turbine, it expands to 0.4 MPa and theintermediate superheater...
- Q Would you recommend the use of magnetic particle testing for thedetection of surface cracks in an aluminum object? Explain youranswer.b) How is magnetic particle testing used to detect surfacecracks in...
- Q Design a power generation system by choosing one of the optionsgiven below.1. Geothermal sourced power plantï‚· Define the geothermal power plant type (TotalFlow/Flash/binary)ï‚· Define turbine isentropic efficiencyï‚· Show all the...
- Q Consider the two-dimensional laminar boundary layer flow of airover a wide 15 cm long flat plate whose surface temperature varieslinearly from 20°C at the leading edge to 40°C at the...
- Q a. State the difference between personal frequency andexcitation frequencyb. State the difference in angular frequency and linearfrequencyc. State the difference between transient response and steady stateresponsed. Mention the different meanings...
- Q 6 m3/s recirculated roomair at 22oC Tdb and 50% saturation, is mixedwith 1.5 m3/s of incoming fresh air at 10oCTdb and 6oC Twb. Determine allproperties of the mixed air that...
- Q 19.7 Consider an AISI 4135 steel in which all of the alloyingelements have the mean or average value of their ranges.(a) Determine its ideal critical diameter.(b) Determine the maximum diameter...
- Q 3-5 page paper on Graphene
- Q 1. Name some sources of industrial vibration?2. What is whirling?3. How is the critical speed of a shaft determined?4. Does the vibratory force transmitted to the foundationincrease with the speed...
- Q 3 kg of air in a closed movable container undergoes a fewprocesses. Initially, the air with P1=330kPa and T1=70°C is cooledwithout producing any work until P2= 100kPa, and then it...
- Q a steam power plant operates on a superheated rankine cyclewhere steam at 10kg/s entering the turbine at 5MPa and 375 degreecelcius and leaving the turbine at saturated vapor at pressure...
- Q 4. 4MPa, 350°C of water vapor enters the insulating turbines,and is discharged into 50kPa of saturated vapor after expansion.Ignore kinetic energy and position energy.1) Draw a schematic diagram and a...
- Q Air at 50 ° C with 1.7 bar gauge pressure enters thecylindrical bearing system, the diameter of which is below, andstanding in an upright position, with an average flow rate...
- Q a frozen ice cream is placed into a container beforethe freezing process is complete. The container has dimensions ofinfinite shapes 8, 10 and 12 cm and is then placed in...
- Q Mastery Question:1. Show an engineering problem and solve the kinematic parametersby using normal-tangent coordinates systems usedto define the motion of an object.Note: Provide a clear diagram of the suggested engineeringproblem...
- Q 1. Show an engineering problem and solve the kinematicparameters by using polar coordinates systems usedto define the motion of an object.Note: Provide a clear diagram of the suggested engineering problemwith...
- Q A centrifugal pump has an eye diameter and an impeller diameterof 300 mm and 600 mm respectively while running at 850 rpm. Whenrotating, the blade angle is measured at 35o...
- Q An engineer is conducted the centrifugal pump at aircrafthangar. The pump has an eye diameter and an impeller diameter of200 mm and 500 mm respectively while running at 900 rpm....
- Q A Rankine cycle power plant is being developed to operate anirrigation system. In this power plant solar energy will be used toboil a low boiling point fluid within glazed flat...
- Q Use the passion curve handout to make an n = 200, c = 1 OC curveand answer the following questions.(4 pts)Use the OC curve to determine the percentage of lots...
- Q An ideal Otto engine has a compression ratio of 10 and uses airas the working fluid. The state of air at the beginning of thecompression process is 100 kPa and...
- Q An air conditioning system is to take outdoor air at 30oC and 70% relative humidity at a steady rate of 10m3/s and to condition it to 25 oC and 50%relative...
- Q CASE 750W MICROWAVE OVEN. COMPULSORY In your new roleas quality manager of the high-tech unit of a large nationalcompany, you identify a problem which is typified by the twointernal memos...
- Q A cylinder(σY= 230 MPa)which is initially free from residualstress has internal radius b = 20 mm and external radiusa= 50 mm.Determine:a)The maximum internal pressure without yielding the cylinder.Give your answer...
- Q 3.1. Oil with (Ï = 788 kg/m3 and ν=0.00067 m2 is removed to theatmosphere through a pipe, 7mm diameter, and 37m long. The pipe islocated 3.5m from the top of...
- Q A refrigeration system with a flash chamber operates with R134abetween the pressure limits of 1.0 and 0.1 MPa. The refrigerantleaves the condenser as saturated liquid and is throttled to aflash...
- Q Each axis of a two-axis plotter utilises a stepper motor with 60pulses per revolution. For each axis, the output is coupled to alead screw with a 13:1 gear reduction and...
- Q Consider a steam power plant operating on a simple idealRankine cycle and having a net power output of 57 MW. The steamenters the turbine at 9 MPa and 575 °...
- Q The department has been approached by the school superintendentabout starting a Fire and Life Safety Education Program for allgrades, K-12. As the fire inspector, this project will fall underyour responsibility....
- Q Getparts for hydrogen cars and design your own car.
- Q In an interchangeable system, why is statistical approach ispreferred over a complete interchangeability approach? State thecondition for complete interchangeability approach.
- Q An air conditioner using R134a as the working fluid operates onan ideal vapour compression system between 0.3 and 0.8 MPa. If thespecified capacity for air conditioning is 20 kW. What...
- Q We have a metal alloy (bcc) thatMetal A is FCC, 30 atom% (40.244 wt%), r=0.2 nm, A = 55g/moland, Metal B is BCC, 70 atom% (59.756 wt%), r=0.24 nm, A...
- Q A bio-reactor is kept at 45°C on a day where the outside is20°C. It is estimated that the bio-reactor loses 12 kW to theambient. Waste heat at 450 K from...
- Q An audit was conducted on a large food processing plant and itrevealed poor maintenance practices resulting in numerous andrepeated equipment failures, low reliability and availability. Youare required to recommend the...
- Q anx ray diffractometer recorder chart for an element that has eitherBCC or FCC structure showed diffraction peaks at the following 2@angles: 41.07, 47.73, 69.879, 84.396. the wavelenght of theincoming radiation...
- Q An audit of the maintenance management function in a foodprocessing plant indicated that Maintenance Technicians were notsuitably equipped to perform their jobs effectively. What are therequirements or resources needed by...
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