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Mechanical Engineering

DrD

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Status Replies posted by DrD

  1. Hi

    1. DrD

      DrD

      I agree. Hello.

      DrD

  2. How would you know if you are talking to an Engineer or a Salesman?

    1. DrD

      DrD

      You could simply ask him which he is.

      DrD

    2. (See 1 other reply to this status update)

  3. Should I learn Autodesk AutoCAD as a Mechanical Engineering Student?. Or which softwares should I learn?

    1. DrD

      DrD

      You should expect that, no matter which software you learn today, it will soon be out of date. In ten years you will be using a software system that does not exist today. That's life.

      DrD

    2. (See 1 other reply to this status update)

  4. Hi I have a doubt I am studying strain of the materials and I wanted to know is there are internal forces when the bodyt is in equilibrium and if so, this is at the molecular level

    1. DrD

      DrD

      Without a doubt there are all manner of internal forces at the molecular level whether the body is in equilibrium or not. These forces are not of engineering interest. We can do nothing with them. We cannot change them, control them, or do anything else. Also, they do not affect anything of engineering concern.

      When we talk about strain, then that implies internal forces caused by stretching and deforming the material. The forces associated with elastic strain are released when the deformation is removed. The forces associated with plastic strain are not fully released when the external load is removed. This is the reason it is sometimes necessary to stress relieve a part after manufacturing, to remove the locked up internal stresses.

  5. Hi,

    I need all types of interview questions on camshaft manufacturing by sand casting.

    Please guide me...

    1. DrD

      DrD

      If you start with cast material for a cam shaft, you have a long way to go to the finished product. Depending on the exact material, you may have to worry about wear and strength as well. Forged material is generally preferred for automotive applications.

      DrD

       

    2. (See 2 other replies to this status update)

  6. n.gif.a93dccc0c76e3211dec5de62f180c6d8.gif

    1. DrD

      DrD

      I'll bite. Why no moustache? The only folks I know of that have full beards with no moustaches are the Amish, but your name certainly does not look Amish.

  7. Hay users. please give me some suggestions about this pdf !!! This is my project and I have to add something .. please give me some suggestions to add something and rewrite again this topic ..

    Arindam_project_1 pdf.pdf

    1. DrD

      DrD

      Before there can be any meaningful comments, we need to know what your objective is for this paper. What are you trying to accomplish (other than simply get a grade)? It is to give qualitative information only, or are you interested in giving quantitative information as well? Have you thought about discussing costs of the various options?

      DrD

  8. In a single cylinder in si engines the power stroke starts in which degree rotation of crankshaft

    1. DrD

      DrD

      The power stroke begins with the piston at TDC. By some conventions, this is 0 degrees, by others it may have some other value; the degree value is arbitrary.

      DrD

  9. What is diesel power plant ?

     

    1. DrD

      DrD

      In the most literal sense, the term "diesel power plant" means a plant that burns diesel oil to produce power in some form.

      Most often this refers to a machine that burns diesel oil in a compression ignition engine to produce power. An electrical generator may be attached to convert that power into electrical form, but the prime mover is the diesel engine.

      DrD

  10. As a graduate which of this area is prefareable to do my masters in vibration of mechanical systems or thermal power

    1. DrD

      DrD

      Karthik Pasala recommends, "you can opt thermal because there is lots of research going in there." I think this is a correct statement, but I also think that this should not be the overriding consideration.

      Hot research come and go in cycles. Today, thermal power is hot, but 10 years from now, there may be quite a bit less interest in it (or there may be more. No one knows.)

      The important thing is to determine where your own interests lie. There is no point at all to studying hard and preparing for a career in any area you really find uninteresting. That is way too much work for too little return.

      There will never come a day when thermal power is not important, but the same can be said of vibrations. The two are often linked. For example, large steam turbines used in power generation have many, many vibration problems. This is also true of couplings, generator rotors, feed water pumps, and a host of other machinery associated with thermal power production. There are, of course, countless vibration problems that have little or nothing to do with power production.

      THINK ABOUT WHAT REALLY INTERESTS YOU!!!

      DrD

    2. (See 3 other replies to this status update)

  11. As a graduate which of this area is prefareable to do my masters in vibration of mechanical systems or thermal power

    1. DrD

      DrD

      That depends entirely on what interest you and what you know the most about. There is work in both areas, so go where you think you can contribute the most.

      DrD

    2. (See 3 other replies to this status update)

  12. Blessed with daughter :)

    1. DrD

      DrD

      Congratulations!

      Your life will never be the same again! (I know; I have two of them as well as a son.)

    2. (See 4 other replies to this status update)

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