Mechanical Engineering question and answers for July 24, 2023
- Q I need a two pages summary of the book ( Theory And Design ForMechanical Measurements, 6th Edition) for the chapters from one tochapter seven. The book also contain an introduction...
- Q 1. A load of 25,000 N is applied on a part of radius 15 mm, whatis the shear stress,??Hint, shear stress = load/cross sectional area.(up to 10 points)2. If the...
- Q Exercise 6.5 Compute the stresses in laminate coordinates at topand bottom of each lamina in Example 6.1 (p. 178) when the laminateis subjected to ?0x = 765(10?6) mm/mm, ?0y =...
- Q 10.8D According to researchers, advances in nanomaterialfabrication are leading to development of tiny thermoelectricmodules that could be used in various applications, includingintegrating nanoscale cooling devices within the uniforms offirefighters, emergency...
- Q Superheated steam at 8 MPa and 480°C leaves the steam generatorof a vapor power plant. Heat transfer and frictional effects in theline connecting the steam generator and the turbine reduce...
- Q Estimate the value of the acentric factor, w, for nitrogen, using tabular vapor pressure andcritical data. The vapor pressures of nitrogen at 85 and 90 K,respectively, are 2.291 and 3.608...
- Q If four nuclei of 1H1 were to fuse toproduce a nucleus of 2He4, what is the massdefect and the corresponding energy released? What is the energy inkJ that would be...
- Q a) A machined steel has the following properties: Sut= 400 MPa,Sy= 350 MPa, and S’e= 200 MPa. The value f = 0.9 Sketch the S-Ndiagram for this material, label the...
- Q From a surface measurement made by surface profilometer, thefollowing point values were obtained. (The scale factor is 0.6micrometer). There are 10 points.516,534,518,533,518,530,520,526,521 and 526.Try to find Ra,Rq,Rt values and Ratio...
- Q Clearly identify and explain the reasonbehind the key processing limits relevant to thematerial extrusion process - FDM(Fuse deposition modelling) thatare based on:a. Limits of the material beingprocessedb. Limits of the...
- Q Answer the 2 questions below in regards to the materialextrusion process , FDM (Fusedeposition modelling).a. Detailed Explanation of how andwhy the following 3 variables affect theSURFACE FINISH of the product1....
- Q Air as an ideal gas enters a diffuser operating at steady stateat 5 bar, 340 K with a velocity of 512 m/s. The exit velocity is110 m/s.For adiabatic operation with...
- Q Problem 8-49 from the textbook, Mechanics of Materials by R.C. Hibbler. It is the 10th addition. Â
- Q Nitrogen (N2) at 1 bar, 300 K enters a compressoroperating at steady state and is compressed adiabatically to anexit state of 16 bar, 750 K. The N2 is modeled as...
- Q What are the 5 different type of sensory warnings for productsafety?
- Q Describe the physical structure of bonded abrasives.identifying what is grit number, bond strength, andporosity.
- Q Water vapor at 5 MPa, 320°C enters a turbine operating at steadystate and expands to 0.1 bar. The mass flow rate is 2.52 kg/s, andthe isentropic turbine efficiency is 92%....
- Q i have to write a survey paper on the history of adynamics related concept, tool, application, or mechanism. i amstruggling to find good topics. please help me by suggesting sometopics
- Q Rank the following from most isotropic to least isotropic.Unidirectional Long FiberRandom shortFiber Randon long fiber (not woven)Oriented short Fiber
- Q Consider a machine that has a natural process time of 1 minute(deterministic) when it works but is subject to failures withMTTF=100 minutes and MTTR=10 minutes. Assumecr=1. This machine receives parts...
- Q Explain what are the properties (that is, relating to itsvelocity vs temperature) of a SAE 5W/30 oil
- Q List 5 Suitable applications of Lubricating Greases inMechanical Engineering?
- Q Water flowing at a rate of 0.667 kg/s (Cp = 4.192kJ/kg. K) enters a counter current heat exchanger at 318 K and isheated by an oil stream entering at 393...
- Q Describe step-by-step brittle fracture of some metals and ceramicswith poor ductility and toughness. In discussion highlight and userelevant terms such as transgranular, Chevron pattern andothers.Answer should jot exceds more than...
- Q information about the metal additive manufacturing process anddefects and parameters
- Q I want an example that explains and calculate the kineticsrocket based on FBD by idealizing the NASA space shuttle to aparticle which has curvilinear motion. Assume the Earth is flat...
- Q What type of directional valve is used to control theforward and reverse of a double-acting hydraulic piston?a) 3 way/ 2 positionb) 4 way/ 2 positionc) 4 way/ 3 positionand why?
- Q Plot longitudinal tensile strength of an E-glass/epoxyunidirectionally reinforced composite as a function of volumefraction of fiber and assuming tensile strength follows a volumerule of additivity.E-glass: modulus = 72.4 GPa, tensile...
- Q Explain the physics behind pistons in paragraph format.
- Q 1. An aluminum circular cylinder 50 mm in diameter with endsinsulated is initially at 100â—¦C. Approximate the temperature at thecenter of the cylinder after 2 s if the lateral surface...
- Q In one batch of nickel (Ni)-plated cast iron components, youobserved that there were minute pores in the Ni surface coatinggrowing down to the cast iron surface.Should you allow this batchof...
- Q Aquaplaning(General Question)What is happening physically when a pontoon of a floatplanebegins to aquaplane. Like are forces from water on the floats lessbecause its not fully submerged anymore?
- Q The Lockheed SR-71 Blackbird aircraft cruises at Mach number of3.3 at an altitude of 85,000 ft. Calculate the speed of sound andflight speed at these conditions. Compare the flight speed...
- Q A rigid tank of volume 0.63 m3 initially has some air inside at0.5 bar and 300 K. A hole develops in the wall, and air from thesurroundings at 1 bar,...
- Q A steam thermoelectric plant operates a Rankine cycle withoverheating. Water enters the pump as saturated liquid , 7.7 kg/s.The efficiency of the pump is 0.9 The water enters the highpression...
- Q Prepare 5 pages (max. ) brief description about Multiphase flowpumps that work at high gas volume fraction or percentage ( highGVF).The report should address the following important points:1- Differences between...
- Q What are the advantages and disadvantages of the PI controller,PD controller and PID controller ?ADVANCED DYNAMICS AND CONTROL SYSTEMS
- Q Develop a maintenance/life cycle plan for your house/car. Itshall include at least 8 items that are done over the life cycle ofthe system and go out for at least 5...
- Q A certain process requires 2.8 cfs of water to be delivered at apressure of 30 psi. This water comes from a large-diameter supplymain in which the pressure remains at 60...
- Q You are investigating two sensors to use in an experiment.Sensor A has area 600 ± 0.3 mm2 and the gap thickness is 0.3 ± 0.01mm. Sensor B has area 400...
- Q A steam generator consists of a bank of stainless stell (k=15W/m·K) tubes habing the core configuration of CF7.0-5 and an innerdiameter of 13.8 mm. The tubes are installed in a...
- Q AEROSPACE ENGINEERING PROBLEMEDITED.(20 pts) A spacecraft is launched on a mission to Mars startingfrom a 300 kmcircular parking orbit. Calculate the departure angle, of thedeparture hyperbola.May I please get some...
- Q A solid round bar with diameter D=1D=1 has a grove of depthe=0.1e=0.1 in, with radius r=0.1r=0.1 in, as shown in TableA-15-15. The bar is made of cold drawn steel with...
- Q Two previously undeformed cylindrical specimens of an alloy areto be strain hardened by reducing their cross-sectional areas(while maintaining their circular cross sections). For onespecimen, the initial and deformed radii are...
- Q The dry- and wet-bulb temperatures of atmospheric air at 98 kPaare 28 and 14°C, respectively. Determine the followingvalues.  1. The specific humidity in  kg H2O/kg dryair2. The relative humidity in %3. The...
- Q Consider a light, single-engine, propeller-driven, privateairplane, approximately modeled after the Cessna T-41A. Thecharacteristics of the airplane are as follows: wingspan = 35.8 ft,wing area = 174 ft2, normal gross weight...
- Q Consider an airplane patterned after the Beechcraft BonanzaV-tailed, single-engine light private airplane. The characteristicsof the airplane are as follows: aspect ratio = 6.2, wing area = 181ft2, Oswald efficiency factor...
- Q Consider an airplane patterned after the Fairchild RepublicA-10, a twin-jet attack aircraft. The airplane has the followingcharacteristics: wing area = 47 m2, aspect ratio = 6.5,Oswald efficiency factor = 0.87,...
- Q As the dimensions of an object reduces, why does the surfaceforces become more dominant as compared to the body forces? Forexample a 1 in^3 of SiO2 will drop to the...
- Q In looking at the thermoelectric effect in silicon crystallinenanowires, why does DECREASING NANOWIRE DIMENSION ANDINCREASING WIRE SURFACE ROUGHNESS increase thethermoelectric figure of merit?
- Q Two parts of a machine are held together by eight equally-spacedM6x1.0 grade 5.8 bolts that are unifomly tightened to provide atotal inital clamping force of 44 kN. Each bolt has...
- Q Problem1. A piston cylinder device containing 0.5 kg of waterhas initial volume of 0.5L. The device starts and goes through aCarnot cycle and generates 500.3 kJ work. If the maximumtemperature...
- Q R-134a flows in a horizontal 8 mm diameter circular tube. Themass flux is 400 kg/m2s, the entering quality is 0.0, and theexisting quality is 0.8. The tube length is 3...
- Q Differentiate continuous and project typeproduction
- Q Consider the TOYCO model given below:TOYCO Primal:max z=3x1+2x2+5x3s.t.x1 + 2x2 + x3 ? 430 (Operation 1)3x1 + 2x3 ? 460 (Operation 2)x1 + 4x2 ? 420 (Opeartion 3 )x1, x2,...
- Q List and describe the sequence of events for injectionmolding.
- Q Introduce current technological challenges with respect to theengineering design of vision systems for drones and autonomousvehicles. Also, present the underlying physical and engineeringprinciple of autonomous vision systems. How can the...
- Q How would one machine a typical shaft and shaft sleeve? Describethe sequence of operations. What are the manufacturing processused? Please answer with detail.
- Q b. Conduct an analysis for a gas turbine combustor usingPropane, C3H8, you can assume the product outlet temperature is1500 K and the air inlet temperature is 650 K on a...
- Q List the parameters that influence temperature during metalcutting, and explain why and how?
- Q A thin airfoil can be approximated as a flat plate. The airfoilis set at an angle of 10° to an air flow with Mach 2, a temperatureof –50°C, and a...
- Q A small research vehicle with a length of 4 ft travels at Mach15 at altitudes of 100,000 and 250,000 ft. Determine whether, atthese two altitudes, the missile is in the...
- Q Consider a compressor in which air enters at 1 bar, 27°C andexits at 3.5 bar, 127°C. The work required is 127 kJ/kg of airflowing through the compressor. Heat transfer between...
- Q An object of irregular shape has a characteristic length ofL = 1 m and is maintained at a uniform surface temperatureof Ts = 325 K. It is suspended in anairstream...
- Q Explain unconventional machining process?b) why it applicable to small machining operations.
- Q Determine L10 (hours) for the given system below:Type of bearings: Angular-Contact Ball BearingsSeries: 02-55 (Bore = 55 mm)Which ring rotates? Inner ringn_D (revs/min) = 320af (application factor) = 1.2R =...
- Q Explain the effect doping towards an intrinsic silicon. Give oneexample of donor element and one example of acceptor element.(15marks)Please help answer by typing using computer. please help .pleasemake sure answer...
- Q A rigid body of any given shape rotates freely under zerotorque. Show by using Euler’s equationsthat the rotational kinetic energy and the magnitude of the angularmomentum areconstant.
- Q 12-5. An air-cycle unit operating on the simple system is designedfor the following  conditions: 15 lb/min of conditioned air, air entering the turbineat 60 psia, cabinpressure 14 psia, dry-air rated discharge...
- Q Very briefly, give a short no more than one-page (per subject)tutorial (i.e., introduction and problem statement,state-of-the-art, and recent advances) on NO MORE THAN 3 (anythree) of the following topics.Topics:i) Bio-inspired...
- Q derive equation of thermal energy balance for fin?also draw figures applicable
- Q Provide a description of the following micro-sensors/actuatorsfabrication processes:1.) photolithography2.) oxidation3.) chemical vapor deposition4.) chemical and plasma etching5.) bulk micromanufacturing6.) surface micromanufacturing7.) LIGA process
- Q Provide a description of the materials selection for thefollowing micro-sensors/actuators:1.) substrates and wafers2.) silicon compounds such as dioxide, carbide, nitride, andpolycrystalline3.) silicon piezoelectric4.) gallium arsenide5.) piezoelectric crystals6.) polymers7.) films
- Q Provide a description of the working principles of the followingmicro-actuators1.) thermal forces2.) shape-memory alloys3.) piezoelectric4.) electrostatic
- Q Provide a description of the working principles of the followingmicro-sensors:1.) chemical2.) optical3.) acoustic wave4.) pressure5.) thermal
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