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Popular Content

Showing content with the highest reputation since 12/08/2010 in all areas

  1. Basically a Pump is used for liquid or fluid to transform it to a much high pressure head while a Compressor is used for gases to transform from low to a much high pressure. From Mechanical Engineering point of view liquid is incompressible so Compressor cannot be used for liquid substances. Posted by AbdulQadir Abba Sheriff on linkedin
    52 points
  2. 1. What is the difference between scavenging and supercharging ? Ans: Scavenging is process of flushing out burnt gases from engine cylinder by introducing fresh air in the cylinder before exhaust stroke ends. Supercharging is the process of supplying higher mass of air by compressing the atmospheric air. 2. What are the names given to constant temperature, constant pressure, constant volume, constant internal energy, constant enthalpy, and constant entropy processes.Ans: Isothermal, isochroic, isobaric, free expression, throttling and adiabatic processes respectively. 3. In a Rankine cycl
    39 points
  3. 7,789 downloads

    ANSYS offers engineering simulation solution sets in engineering simulation that a design process requires. Companies in a wide variety of industries use ANSYS software. The tools put a virtual product through a rigorous testing procedure (such as crashing a car into a brick wall, or running for several years on a tarmac road) before it becomes a physical object. This pdf gives good start to understand and learn ANSYS
    39 points
  4. Version 1.1.0

    43,600 downloads

    A COMPLETE INSTRUCTOR AND STUDENT SUPPLEMENT PACKAGE - Continued These ppts are set of instructor and student supplements. . A FOCUS ON DIAGNOSIS AND PROBLEM SOLVING The primary focus of these ppts is to satisfy the need for problem diagnosis. Time and again, the author has heard that technicians need more training in diagnostic procedures and skill development. To meet this need and to help illustrate how real problems are solved, diagnostic stories are included throughout. Each new topic covers the parts involved as well as their purpose, function, and operation, and how to tes
    31 points
  5. the world’s biggest engine, has a weight of 2.3 million kilogram. If the weight of the average adult person is 70 kilograms, this world’s biggest engine has a weight equivalent to the weight of 33,000 people. World’s Most Powerful Engine Can Light a Small Town When the world’s biggest engine is running at 102 revolutions per minute, it produces 80 million watts of power energy. If the average household bulb consumes 60 watts of energy, 80 million watts is enough power for 1.3 million bulbs. If the average house has 6 bulbs lighting at any one time, the Wärtsilä-Sulzer RTA96 engine will p
    27 points
  6. 9,800 downloads

    Dear Folks, Enjoy with useful Engineers pocket guide
    27 points
  7. Selection of material is an important aspect for manufacturing industries . The quality of product is highly depends upon its material properties. These properties are used to distinguish materials from each other. For Example: A harder material is used to make tools.A ductile material is used to draw wires. So the knowledge of mechanical properties of material is desirable for any mechanical student or for any person belongs to mechanical industries. This post brings top 18 mechanical properties. Mechanical properties of material: There are mainly two types of materials. Firs
    25 points
  8. What is the difference between pump and compressor ? When we use pump and When we use compressor? You can answer this questionYou can like the best answerYou can share the question.....You can get updates of new questions on Facebook linkedin twitter & google plus
    25 points
  9. Posted by Mohammed sulieman in linkedin • abdulQadir i think ur answer is right and 2 make it more simple and easy 2 understand allow me 2 do this: pump: 1- used 4 incompressible fluid 2 transfer them from 1 place (low pressure) 2 another (high pressure) normally. 2- No change in fluids temp or volume when it s passed through pump. compressor: 1- use 4 compressible fluid whether 2 increase the fluid pressure or even 2 transform them from gas 2 liquid 2- there ll be a change in fluids temp, volume n pressure. in addition, da comprssor can be used along with a storage which mean
    21 points
  10. Shaft is a mechanical element that transmit power and torque moment. Usually shafts are the elements with gears and pulleys attach on them (power transmission). The axle on the other hand is a mechanical element that does not transmit power. It can rotate or it can stand still. It is only loaded with bending moments. In vehicles, the terminology is same. The shafts that transmit power to the wheels are called drive shafts. The driven wheels have axles. Some people like to call the drive shafts axles (or half axles), from where the confusion can occur. The right term is drive shafts.
    20 points
  11. 11,844 downloads

    The Internal-Combustion Engine in Theory and Practice Volume I : Thermodynamics, Fluid Flow, Performance Second Edition, Revised by Charles Fayette Taylor Professor of Automotive Engineering, Emeritus Massachusetts Institute of Technology
    18 points
  12. 10,845 downloads

    Presentation on Design of- Clutch Brake Belts Chain Gears
    17 points
  13. As an older engineer, I am rather dismayed by what I see as the results of engineering education today. I have seen most young engineers come out of their college degree programs with a modest familiarity with come CAD program and a related Finite Element program, and an almost complete lack of capability to analyze machine components without the use of FEA. Thus they are unfamilliar with basic design calculations relating shear stress in a shaft to the power being transmitted, the shaft sped and the shaft diameter. Instead, they want to create an FEA model and run the numbers that way which i
    17 points
  14. saurabhjain

    Metal Forming

    7,241 downloads

    Powerpoint Notes on Metal forming Topic includes— Hot &Cold working Forging Extrusion Rolling Drawing
    17 points
  15. While both devices provide a form of forced induction for internal combustion engines The primary difference lies in how the devices are powered. Turbochargers are powered by exhaust gasses. Superchargers are powered by a belt, chain link, or gears, directly to the engine (the crankshaft in most cases). Turbochargers perform better at higher rpm's do to more exhaust gases spinning the turbine which then in turn causes the compressor to draw in more air. This has a downside due to lag time which can be referred to as spooling up. Superchargers work better at low RPM's due to the direct link
    17 points
  16. Machine is a device which converts any available form of energy into useful work where as engine is a device which converts heat energy to convert mechanical energy .
    17 points
  17. What is the difference between first angle method and third angle method in engineering drawing? Why is first angle method preferred over third angle in most of the countries?
    16 points
  18. This is one important point missing in the two previous answers. The "cc rating" of an engine is a volume measure, as previously stated, but it is not the actual cylinder volume. Rather, it is the swept volume of the cylinder, also called the "displacement" of the cylinder. The actual cylinder volume is always somewhat greater than this value because the piston at TDC does not leave zero cylinder volume. The small volume remaining at TDC is called the "clearance volume," the volume available for the early stage of combustion. DrD
    16 points
  19. In DTSi, instead of 1 we are using 2 spark plugs. Flame front formed is able to consume more air-fuel mixture as compared with 1 spark plug, thus more complete burning and more efficiency. in DTS-Si, with addition of 2nd spark plug, what they are doing is relocating valves position. With proper designing of inlet and outlet valves you can induce extra swirl for inoming air fuel mixture. Due to turbulence, extra efforts are provided for proper mixing of air and fuel. (We can not allow petrol to go in liquid droplet form, it should be finely atomized). With well atomized air fuel mixture, eff
    16 points
  20. Why first angle and third angle method is used and why second and fourth angle method is not used? 1. You can answer this question 2. You can like the best answer 3. You can share the question...
    15 points
  21. 9,325 downloads

    Fit_and_Dimensional_Tolerances_Mechanical_Engineering_Drawing Source Ashish K Darpe Department of Mechanical Engineering IIT Delhi Thanks to Mr. Ashish K Darpe Regards Saurabh Jain
    15 points
  22. Version 1.0.0

    1,346 downloads

    INTERVIEW preparatory Syllabi, answers and HR questions for a Mechanical Engineer !
    15 points
  23. From the album: Engineering images

    An air conditioner works as a heat exchanger. It takes in warm air in your room and passes it over a set of cooling coil and then blows it back to the room as cold air. The cooling cycle of your air conditioner involves two basic processes: condensation and evaporation (you must have learned about them in school). There are 4 important components in your AC that control the cooling cycle: Compressor Condenser coils Evaporator Coils Freon- Cooling agent Compression and condensation cycle The coolant (mixed with lubricating o
    14 points
  24. From the album: Engines

    How the cam and follower system in an internal combustion engine work is shown in the animation of the four stroke cycle above. If you like it - do share it
    14 points
  25. THIS IS A WONDERFUL ANIMATION ON HOW AN IC ENGINE WORKS..FROM FORD DESIGN TEAM...
    14 points
  26. Pumps can handle both liquids and gases. But Compressor can handle only the gases due the incompressible nature of liquids.................
    14 points
  27. Please reply Name Engineering college Location (City/ Country) Engineering Batch Engineering Company/ Dream company to work for Area of Interest Project undertaken Any other info you want to share
    13 points
  28. An axle is a center of rotation (derived from the word axis). A shaft is a rotational power transmission device. The words are often used interchangeably. Specifically in a vehicle: An axle is often thought of as extending transversely (side to side) the full width of the vehicle - from wheel to wheel. For a motorcycle it extends to both sides of the frame through the wheel hub. A propeller shaft is a shaft that runs longitudinally (front to back) like an airplane propeller shaft. A shaft is a power transmission device, connected to a gear or coupler on both ends. An axle may or may not transm
    13 points
  29. A Community Built on False Values This may well prove to be the least popular thing I ever post on this blog because what I have to say may offend many. I do not say it with the intent to offend, but because I am compelled to give a warning. One of the most interesting things that has developed from my blog, Mechanics Corner, here on the ME Forum has been the opportunity to correspond directly with a modest number of readers. This has included both young men and young women scattered across India, Southeast Asia, the Middle East, and the rest the world. The majority of them are still students,
    13 points
  30. There has always been a debate and discussion among all engineering students about which engineering course is the best? Students always love discussing about the best branch of engineering. Though this is a proven fact and it needs no discussion that mechanical engineering is the best still I will be providing 10 reasons over here which make mechanical engineering The Best among all other branches of engineering. #1 Evergreen Field: Mechanical engineering is an evergreen field. Applications of mechanical engineering have spread over such a wide spectrum that it has penetrated into a
    12 points
  31. Dear Mechanical Engineering members, I want you all to visit iMechanical Engineering Forum once every day and for same I am starting "Attendance Please" Post. Many of us read as guests, some of them just sign in and sign out and then I request every one to mark your attendance by replying to this post. Your presence will make all members active and visible on the board.
    12 points
  32. DrD

    How To Become An Expert

    Mechanics Corner A Journal of Applied Mechanics and Mathematics by DrD © Machinery Dynamics Research, 2016 How To Become An Expert Introduction This is going to be another of those personal experience/opinion pieces, so if these bore you, be warned! This may be the time to click on something else. A reader recently wrote to me asking how to become an expert. I have to tell you, I don't spend much time thinking about being an expert, but I suppose on some reflection, the shoe probably fits. (Most of the time, I see myself as simply a tired old man
    12 points
  33. saurabhjain

    v-twin engine-animation

    From the album: Engines

    12 points
  34. Most of the time gears are used for reduction. So pinion is smaller as compared to gear, i.e. no of teeth on pinion are less as compared to gear. This in accordance affects the number of cycles. Thus in any operation, pinion performs more cylces as compared to gear. More cycles means more wear and hence generally pinion material is selected such that its hardness is more than material of Gear.
    12 points
  35. In second angle, both top and front view are drawn above the x-line whereas in fourth angle its vice versa. In second and fourth angle method, top view and front view overlaps. hence we never use those methods. In first angle method, front view lies above the x-line and top view lies below. vice versa for third angle. As both the views lies on either side of x-line in first & third angle, we make use of these methods.
    12 points
  36. Basic Difference is the how their are measured.. [1] i.e. A pipe is measured by ID(inner diameter) and a tube is measured by OD(outer diameter). [2] a pipe is like a vessel to store a liquid/gas so inside volume is important factor, while a tube is seen as structual member so total volume is important factor.
    12 points
  37. Chanu

    Catia 3D Design

    Version 1.1

    5,284 downloads

    11 points
  38. Mechanical Engineering Interview Questions and answers for freshers on design, safety and maintenance. 1) What is an accident ? An accident is a unexpected and unforeseen event which may or may not injury to a person or a machine tool. 2) What are the standard sizes of drawing board as per Indian Standards? As per Indian Standards :1250×900,900×650,650×500,500×350,350×250 sizes are available. 3) What are the functions of a scale ? (a) To measure distance accurately. (b) For making drawing to scale either in full size, reduced size or enlarged size. 4) What is
    11 points
  39. I have been encouraged to contribute to the Mechanical Engineering web site by Dr. D. I have started the blog "Not Taught in Class". The purpose of the blog is to provide examples of lessons learned in the field that you would not learn in class. These stories are not white papers, just real life examples of things not expected and problems solved. The blog postings will also attempt to provide insight and perspective that comes with many years in the field of engineering. I hope the blog postings will be informative and in many cases entertaining.
    11 points
  40. ABS- it allows the brakes to be applied while maintaining a tractive contact with the road. it does not allow the wheels to be stopped a once. if it was stopped at once due to inertia(because of the speed with which it comes), the vehicles skids. it is more prominent in low friction surfaces like on ice, wet road etc. In ABS the wheels are not stopped at once. It grips the disc mounted on the wheel. the disc is pressed and released with a gap of nanoseconds. thus the driver do not actually feel it. It increases the braking distance. EBD- It is an electronic device that is mounted on the vehic
    11 points
  41. The question posed was, "Is mechanical engineering good for girls?" but I would like to take a contrarian position and ask the opposite question, "Are girls good for mechanical engineering?" I have no doubt that young women are able to complete the educational process and to perform the job (at least some of them are), but are they a good investment of our educational resources? Most young women will want to marry; it is a natural thing. With marriage come additional family responsibilities, a husband, children, a home to manage. This usually leads to one of two possible ends: (1) they d
    11 points
  42. Tyres are mixture of various rubbers with carbon black added. Carbon black improves traction and wear resistance of pure rubber. Another reason is that black color has higher absorption capability by which the tyre of any vehicle becomes adhesive to road
    11 points
  43. air conditioning is not only related to cooling air.. its about controlling temperature, humidity, purity and flow of air throughout the area.. Refrigeration is only related about reducing temperature..
    11 points
  44. Difference between working of centrifugal pump & reciprocating pump ?
    10 points
  45. 1. pressure represent intensity of external forces acting at a point. but stress represent intensity of internal resisting forces develop at a point.2. pressure is always acts normal to the surface. but but stress may also act either normal or parallel to the surface.3. magnitude of pressure at a point in all direction remain same. but magnitude of stress at a point in all the direction are unequal.4. pressure can be measure by using measuring device.like pressure gauge. but stress can't be measure directly by using any device.
    10 points
  46. DrD

    Where Will I Find A Job??

    Where Will I Find A Job?? As I read over the questions that readers post here on ME Forum and elsewhere, I sense a common theme in many of them. There seems to be a wide, dare I say almost universal, concern about where those currently in college will find employment after graduation. To a degree this is entirely understandable; we all wonder what is in our future. Even so, the level of anxiety that I sense in many of your postings strikes me as extraordinarily high. Let us consider this a bit. Most readers of ME Forum are currently enrolled in an engineering curriculum somewhere. Some are jus
    10 points
  47. Machine is a device to transmit force it may or may not produce power whereas Engine is used to produce power.
    10 points
  48. The original question was, "Why is first angle method preferred over third angle?" I think in the long run, it all comes down to local custom and tradition. Both convery the same information, so neither it truly superior to the other. That said, there is one basis for a good selection that might tilt in favor of one or the other. It is desireable to minimize the number of hidden lines in a drawing, so if one method results in more hidden lines than the other, the second option is preferable. Again though, I think it is a matter of familiarity, what we are all agreed upon, all of wh
    10 points
  49. To draw a projection of any object first we need to place this object in any quardrant then fit a source of light in front, above or any angle you want. A shadow will occur in the opposite side of the light source which will represent the projection of that object. Now after drawing this projection, the horizontal plane is to be rotated 90 degree clockwise. in second and fourth angle projection due to this process horizontal and vertical plane will overlap with each other. That's why we can't draw second and fourth angle projection.
    10 points





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