Jump to content
Engineering Wall


Popular Content

Showing content with the highest reputation since 05/13/2015 in all areas

  1. 3 points
    Why centrifugal pump casing is called involutes casing?
  2. 3 points
    Q33. How do you feel about working nights and weekends? BEST ANSWER: First, if you’re a confirmed workaholic, this question is a softball lob. Whack it out of the park on the first swing by saying this kind of schedule is just your style. Add that your family understands it. Indeed, they’re happy for you, as they know you get your greatest satisfaction from your work. Q34. Are you willing to relocate or travel? BEST ANSWER: First find out where you may have to relocate and how much travel may be involved. Q35. Do you have the stomach to fire people? Have you had experience firing many people? BEST ANSWER: Describe the rational and sensible management process you follow in both hiring and firing. Q36. Why have you had so many jobs? BEST ANSWER: First, before you even get to the interview stage, you should try to minimize your image as job hopper. If there are several entries on your resume of less than one year, consider eliminating the less important ones. Perhaps you can specify the time you spent at previous positions in rounded years not in months and years. Q37. What do you see as the proper role/mission of… …a good (job title you’re seeking); …a good manager; …an executive in serving the community; …a leading company in our industry; etc. BEST ANSWER: Think of the most essential ingredients of success for each category above – your job title, your role as manager, your firm’s role, etc. Identify at least three but no more than six qualities you feel are most important to success in each role. Then commit your response to memory. Here, again, the more information you’ve already drawn out about the greatest wants and needs of the interviewer, and the more homework you’ve done to identify the culture of the firm, the more on-target your answer will be. Q38. What would you say to your boss if he’s crazy about an idea, but you think it stinks? BEST ANSWER: Remember the rule stated earlier: In any conflict between values, always choose integrity. Q39. How could you have improved your career progress? BEST ANSWER: You’re generally quite happy with your career progress. Maybe, if you had known something earlier in life (impossible to know at the time, such as the booming growth in a branch in your industry…or the corporate downsizing that would phase out your last job), you might have moved in a certain direction sooner. Q40. What would you do if a fellow executive on your own corporate level wasn’t pulling his/her weight…and this was hurting your department? BEST ANSWER: Try to gauge the political style of the firm and be guided accordingly. In general, fall back on universal principles of effective human relations – which in the end, embody the way you would like to be treated in a similar circumstance. Q41. You’ve been with your firm a long time. Won’t it be hard switching to a new company? BEST ANSWER: To overcome this objection, you must point to the many ways you have grown and adapted to changing conditions at your present firm. It has not been a static situation. Highlight the different responsibilities you’ve held, the wide array of new situations you’ve faced and conquered. Q42. May I contact your present employer for a reference? BEST ANSWER: Express your concern that you’d like to keep your job search private, but that in time, it will be perfectly okay. Q43. Give me an example of your creativity (analytical skill…managing ability, etc.) BEST ANSWER: Remember from Question 2 that you should commit to memory a list of your greatest and most recent achievements, ever ready on the tip of your tongue. Q44. Where could you use some improvement? BEST ANSWER: Keep this answer, like all your answers, positive. A good way to answer this question is to identify a cutting-edge branch of your profession (one that’s not essential to your employer’s needs) as an area you’re very excited about and want to explore more fully over the next six months. Q45. What do you worry about? BEST ANSWER: Redefine the word ‘worry’ so that it does not reflect negatively on you. Q46. How many hours a week do you normally work? BEST ANSWER: If you are in fact a workaholic and you sense this company would like that: Say you are a confirmed workaholic, that you often work nights and weekends. Your family accepts this because it makes you fulfilled. Q47. What’s the most difficult part of being a (job title)? BEST ANSWER: First, redefine “difficult” to be “challenging” which is more positive. Then, identify an area everyone in your profession considers challenging and in which you excel. Describe the process you follow that enables you to get splendid results…and be specific about those results. Example: “I think every sales manager finds it challenging to motivate the troops in a recession. But that’s probably the strongest test of a top sales manager. I feel this is one area where I excel.” Q48. The “Hypothetical Problem” BEST ANSWER: Instead, describe the rational, methodical process you would follow in analyzing this problem, who you would consult with, generating possible solutions, choosing the best course of action, and monitoring the results. Q49. What was the toughest challenge you’ve ever faced? BEST ANSWER:This is an easy question if you’re prepared. Have a recent example ready that demonstrates either: 1. A quality most important to the job at hand; or 2. A quality that is always in demand, such as leadership, initiative, managerial skill, persuasiveness, courage, persistence, intelligence, etc. Q50. Have you consider starting your own business? BEST ANSWER: Again it’s best to: 1. Gauge this company’s corporate culture before answering and… 2. Be honest (which doesn’t mean you have to vividly share your fantasy of the franchise or bed-and-breakfast you someday plan to open). Q51. What are your goals? BEST ANSWER: Many executives in a position to hire you are strong believers in goal-setting. (It’s one of the reason they’ve achieved so much). They like to hire in kind. Q52. What do you for when you hire people? BEST ANSWER: Speak your own thoughts here, but for the best answer weave them around the three most important qualifications for any position. 1. Can the person do the work (qualifications)? 2. Will the person do the work (motivation)? 3. Will the person fit in (“our kind of team player”)? Q53. Sell me this stapler…(this pencil…this clock…or some other object on interviewer’s desk). BEST ANSWER: Of course, you already know the most important secret of all great salesmanship – “find out what people want, then show them how to get it.” Q54. “The Salary Question” – How much money do you want? TRAPS: May also be phrases as, “What salary are you worth?”…or, “How much are you making now?” This is your most important negotiation. Handle it wrong and you can blow the job offer or go to work at far less than you might have gotten. Q55. The Illegal Question BEST ANSWER: Under the ever-present threat of lawsuits, most interviewers are well aware of these taboos. Yet you may encounter, usually on a second or third interview, a senior executive who doesn’t interview much and forgets he can’t ask such questions. Q56. The “Secret” Illegal Question BEST ANSWER: Remember that just because the interviewer doesn’t ask an illegal question doesn’t mean he doesn’t have it. More than likely, he is going to come up with his own answer. So you might as well help him out. Q57. What was the toughest part of your last job? BEST ANSWER: State that there was nothing in your prior position that you found overly difficult, and let your answer go at that. If pressed to expand your answer, you could describe the aspects of the position you enjoyed more than others, making sure that you express maximum enjoyment for those tasks most important to the open position, and you enjoyed least those tasks that are unimportant to the position at hand. Q58. How do you define success…and how do you measure up to your own definition? BEST ANSWER: Give a well-accepted definition of success that leads right into your own stellar collection of achievements. Q59. “The Opinion Question” – What do you think about …Abortion…The President…The Death Penalty…(or any other controversial subject)? BEST ANSWER: In all of these instances, just remember the tale about student and the wise old rabbi. The scene is a seminary, where an overly serious student is pressing the rabbi to answer the ultimate questions of suffering, life and death. But no matter how hard he presses, the wise old rabbi will only answer each difficult question with a question of his own. Q60. If you won $10 million lottery, would you still work? BEST ANSWER: This type of question is aimed at getting at your bedrock attitude about work and how you feel about what you do. Your best answer will focus on your positive feelings. Q61. Looking back on your last position, have you done your best work? BEST ANSWER: To cover both possible paths this question can take, your answer should state that you always try to do your best, and the best of your career is right now. Like an athlete at the top of his game, you are just hitting your career stride thanks to several factors. Then, recap those factors, highlighting your strongest qualifications Q62. Why should I hire you from the outside when I could promote someone from within? BEST ANSWER: Help him see the qualifications that only you can offer. Q63. Tell me something negative you’ve heard about our company… BEST ANSWER: Just remember the rule – never be negative – and you’ll handle this one just fine. Q64. On a scale of one to ten, rate me as an interviewer. BEST ANSWER: Once again, never be negative. The interviewer will only resent criticism coming from you. This is the time to show your positivism.
  3. 2 points
    Mention what are the different kind of cables used for transmissions?
  4. 2 points
    A team researchers used a promising new material to build more functional memristors, bringing us closer to brain-like computing. Both academic and industrial laboratories are working to develop computers that operate more like the human brain. Instead of operating like a conventional, digital system, these new devices could potentially function more like a network of neurons. Researchers are always searching for improved technologies, but the most efficient computer possible already exists. It can learn and adapt without needing to be programmed or updated. It has nearly limitless memory, is difficult to crash, and works at extremely fast speeds. It's not a Mac or a PC; it's the human brain. And scientists around the world want to mimic its abilities. Both academic and industrial laboratories are working to develop computers that operate more like the human brain. Instead of operating like a conventional, digital system, these new devices could potentially function more like a network of neurons. "Memristors could be used as a memory element in an integrated circuit or computer," Hersam said. "Unlike other memories that exist today in modern electronics, memristors are stable and remember their state even if you lose power." Current computers use random access memory (RAM), which moves very quickly as a user works but does not retain unsaved data if power is lost. Flash drives, on the other hand, store information when they are not powered but work much slower. Memristors could provide a memory that is the best of both worlds: fast and reliable. But there's a problem: memristors are two-terminal electronic devices, which can only control one voltage channel. Hersam wanted to transform it into a three-terminal device, allowing it to be used in more complex electronic circuits and systems.
  5. 2 points
    Hey there its my first blog hope you guys will enjoy it. First of all what is suspension..?? Its a basic unit which connects a vehicle to its wheel and provides a relative motion between them. It can be springs, dampers, struts, shock absorbers etc. In this blog I am gonna talk about basics of suspension. The first question is why do we need suspension..?? The basic need of suspension is to satisfy three basic needs which I call the three C namely comfort, control, contact.(I have copied it) We need to be comfortable while driving. Suppose there are stones or pebbles or other things on the road that can cause serious bumping of your vehicles so this makes driving uncomfy. The second and most important thing is contact. While driving tires need to be in contact with the ground or it ​can be hell of a dangerous. The third and most important thing which comes with contact is the control. Now the basic suspension is a spring. Its very simple it just stores energy and releases and are very common with independent suspension. The springs which we use in suspension are either coil spring which we use in independent suspension. The second type of spring is the leaf spring which we can see in trucks. What spring does that it stores energy from the motion of the force pushing into it when compressed and releases when it expands. The drawback is that it will bounce back your car every time the energy releases. So it does not find much use accept in solid wheel axle. The second type which we are gonna discuss are the dampers. Dampers consist of a cylinder with piston fitted into it. Piston has small holes and the cylinder is filled with oil. It basically converts the kinetic energy of shock into other form of energy generally the heat energy. The good thing about dampers is that it reacts to velocity which means that if there is a smaller bump it will dampen less and when the jerk is very large it will dampen​ more. Moreover it shows reactions to turning, braking and accelerations also. Now the main and most used component that's struts. It is a combo of spring and a damper. You know what's the best thing about struts it doesn't only act as a suspension it also act as a basis structural component as it eliminates the need of upper control arm and ball joint(except for wishbone strut which has upper control arm). Now last but not the least the tire has also some spring and damping properties. Hope you guys have enjoyed reading this. Next time I will explain MacPherson struts Cheers Image courtesy- www.google.com
  6. 1 point
    The impulse to stay current and broaden one's horizons is one of the most important characteristics of the professional engineering workforce and such importance highlights the role of continuing education. I welcome thoughts from senior engineers on the importance of continuing education and suggetions to impart for young engineers.
  7. 1 point
    Hi, This is a centrifugal compressor not a pump. The Red Color is a Guide vane and the Yellow one it's a diffuser blade. There are two mine types of pump's casing: 1. Volute. 2. Diffuser. Both of the types work for changing the velocity inside the pump into pressure. Hope this give you the answer for your question Regards,
  8. 1 point



    Transducers ppt
  9. 1 point
  10. 1 point



    Tips, advise and suggestions to engineers for a successful career path....
  11. 1 point
    Evaluation Engineering has published in-depth technical information to the engineering test market for more than 50 years, serving engineers, engineering mangers, and corporate managers responsible for test and quality of electronic products and systems. EE is a multimedia resource delivering a monthly magazine and digital edition, weekly e-newsletters, e-product showcases, special reports, trade show events, and a comprehensive website to buyers and specifiers of test equipment in semiconductors, medical, communication, RF, microwave, and wireless applications. Request Free! View the full article
  12. 1 point
    What is match filter? You can answer this question You can like the best answer You can share the question
  13. 1 point
    digital means on& off , analog means variable from 0 to+vc or -vc ,
  14. 1 point
    Which Branch engineers are more active on the board Help your branch win in the poll !!!
  15. 1 point
  16. 1 point



    Chapter 1. - Introduction Chapter 2. - Analog Signal Conditioning Chapter 3. - Noise and Interference in Instrumentation Systems Chapter 4. - Electronic Sensors for Industrial Measurements Chapter 5. - Optical and Optoelectronic Sensors and Measurements Chapter 6. - Introduction to Biomedical Instrumentation Chapter 7. - Data Acquisition and Conversion. Integration of Data Acquisition Systems.
  17. 1 point
    ​Then there will be one way learning, every oen has to come together to answer and then it will be collective learning
  18. 1 point
  19. 1 point
    The ocean depths are a notoriously treacherous environment for human beings. As such, robots and remote control vehicles have been used for decades to map and monitor underwater environments. The trouble is that robots have to be programmed to do what they do. Even simple tasks, when performed underwater, require a lot of time and attention from engineers, who must write scripts for each particular job. There’s got to be a better way, right? Right. A research initiative at MIT is currently addressing this issue with a new programming approach that gives robots more cognitive capabilities, allowing them to — for lack of a better term — figure stuff out on their own. A robot crew is assigned a certain high-level goal, then the bots work it out among themselves to determine the best way to accomplish the task. In fact, the MIT approach is modeled after time-tested top-down command systems, and specifically inspired by the starship Enterprise from Star Trek. One robot acts as the captain, making high-level decisions, while other bots might serve as navigators, engineers or even doctors — repairing other bots. The approach is similar to a system Williams developed for NASA in the 1990s, which allows for certain autonomous functions on satellites, probes and other spacecraft. Now, a question arises how trustworthy will be the technology. And even if it can reduce a lot of manpower , will it be able to cover all the scenarios of the situation ?? I would like to know your views...
  20. 1 point
    Detail —In real physical processes, some energy is always lost any time work is produced. The lost energy almost always occurs due to friction, especially in processes that involve mechanical motion. But in a new study, physicists have designed an engine that operates with zero friction while still generating power by taking advantage of some quantum shortcuts. The laws of thermodynamics successfully describe the concepts of work and heat in a wide variety of systems, ranging from refrigerators to black holes, as long as the systems are macroscopic. But for quantum technologies on the micro- and nano-scale, quantum fluctuations that are insignificant on large scales start to become prominent. As previous research as shown, the large quantum effects call for a complete reformulation of the thermodynamics laws.In the new paper, the physicists have shown one example of a quantum engine that is "super-adiabatic." That is, the engine uses quantum shortcuts to achieve a state that is usually achieved only by slow adiabatic processes. This engine can achieve a state that is fully frictionless; in other words, the engine reaches its maximum efficiency, while still generating some power.Source: Phys Org.
  21. 1 point
    At this point, I do not see this as engineering, but rather as physics research. It may eventually evolve into an engineering technology, but I do not think that is at all certain. It may also be nothing more than a curiosity forever.
  22. 1 point
    Dear friends as a person past his professional career and carrying the loads of health problems I have dedicated my time to use o project of building a model sailboat from scratch to get in touch with the most diverse technologies. As I started my career as an application engineer in the semiconductor industry my affinity to electronics has strongly influenced my work on this project since nearly a decade. As part of this project I have developed a concept for a sheet control system that has as its objective to implement the some of the techniques used in the original sailboats of the beginning of last century, here the Endeavour. Now talking with experts in real sailboats and with those specialized in building models of sailboats I have been told that the friction of the rope between the sheaves of the pulley in a model scaled 1:20 is so big that the model ship becomes inoperable. Talking with people in physics forums i am told that there is no friction between the rope and the sheaves, only in the bearing of the sheaves! This contradiction made me contact the physics the physics institute at the Ludwig maximilian University, short LMU, here in Munich. The response I got was that physics have the tendency to view problems in ideal systems and as a result their responses are explainable. In the real world there actually is a friction between the rope and the sheaves, the Euler-Eytelwein-Formula. Unfortunately this is not an equation with an "=" sign, but one with =<, I think in english it is called an inequation? The friction issue in the pulley in my model is one were I need a proper response, for which the Euler-eytelwein-Formula is not enough! So, due to this aspect and a couple of other ones i decided to use the method of "Design by Modeling"! First issue I met was that after nearly 4 decades my mathematical skills had eroded and that a lot of advances have taken place, also in mathematics, that I needed to work on it to be able to pursue my objectives! After extensive investigations I do not want to bother you with details I decided to use the modeling and simulation language and environment called "Modelica", details can be found at "www.openmodelica.org", a language that defines itself as an object-oriented equation based modeling language and I decided to use the software tools from Wolfram Software, Mathematica and SystemModeler. Searching in the Internet I found a course from a swiss professor that gave an excellent introduction to Modelica using the tool from Dassault called "Dymola"! But also in this youtube based course he used another tool called "Berkeley Madonna" and referred to the fact that he introduced this tool in in another YouTube video series about "System Physics". This way I learned about System Physics and about the dynamic modeling and the tool he used for it called Berkeley Madonna. The dynamic modeling method was developed by the Sloan Institute of the MIT in the mid fifties of last century to model financial systems to reflect complex dynamic systems. Famous for insiders became this dynamic modeling i.e. the "Club of Rome" used it for its work presented in the famous book about the limits of growth! system Physics is based on research work done at the university of Karlsruhe, Germany, to develop a new didactical method to teach physics. Information about this can be found here. Summarizing the essential of it is, that the system physics found that by applying the methodology from the complex dynamic systems, different areas of physics can be dealt with using the same mathematical equations. In what is relevant for mechanics and therefor the reason why I have made this introduction is, that System Physics, uses the "Momentum" and "Momentum Flow" to deal with translational and rotation mechanics and that the principles of "recipients" and "flows" coming from the "complex dynamic systems" methodology originally developed at the Sloan Institute of the MIT, allow to use the modeling and simulation language "Modelica" to model and simulate physical assignment work! Now, the "sheet control system" concept that I have been developing combines effects and influences from the physical environment in which a sailboat is operated, as multidomain as it is, also covers other aspects that lead to achieve the objective of energy efficiency, thermal aspects, system control aspects and so on. So I decided to model the pulley shown in the above image from the original sailboat Endeavour and that I will implement on my model using system Physics and the Modelica language with the Wolfram Software tools mentioned above. This will allow me to find out if my concept can work with a pulley like the one shown in the picture from the Endeavour and to find out whether the physics were right, or the boating people were right or were between those contradicting positions the reality is! Obviously a model simulation is only as good as the quality of the models used, so that experiments will have to be defined and done to verify the quality of the models used! Finally, the reason I am presenting my project here is, that I want to gain access to the communities, not only of physics electronics and naval experts, but also of the mechanical engineering community. As extensive as this introduction is, I am aware of that it is still very limited to brief you my dear readers enough to capture what this project is all about. So, if you are so nice to start from assuming that what I am dealing with is well thought through, I would ask you to publish the questions that might come up, so that based on responding to those I can expand along the lines of interest you might have!
  23. 1 point
    Sadly no link is given to read about this!
  24. 1 point
    Researchers have developed a shape-changing robot that walks on four legs, can operate without the constraints of a tether, function in a snowstorm, move through puddles of water, and even withstand limited exposure to flames. The soft robot is capable of functioning for several hours using a battery pack or for longer periods with a light—weight electrical tether, and able to carry payloads of up to 8 kg. The robot has been designed by a multidisciplinary team of researchers, including those from the School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, and Department of Chemistry and Chemical Biology, at Harvard University, and the School of Mechanical and Aerospace Engineering at Cornell University.Robots intended for use outside of laboratory environments should be able to operate without the constraints of a tether; this is especially true for robots intended to perform demanding tasks in challenging environments (for example, for search and rescue applications in unstable rubble), researchers said.“We have developed composite soft materials, a mechanical design, and a fabrication method that enable the untethered operation of a soft robot without any rigid structural components,” researchers said.The details of the robot have been described in the journal Soft Robotics.
  25. 0 points
    You can answer this question You can like the best answer You can share the question