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Quality Control Vs Quality Assurance - Difference Between QC and QA
Definition Of Quality Control and Quality Assurance   What is Quality?  Quality is meeting the requirement,...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/quality-control-vs-quality-assurance-difference-qc-qa/" aria-label="View Post: Quality Control Vs Quality Assurance &#8211; Difference Between QC and QA">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Quality Control Vs Quality Assurance &#8211; Difference Between QC and QA","url":"\/\/www.gunkrazy.com\/quality-control-vs-quality-assurance-difference-qc-qa\/","articleBody":"&nbsp;\r\nQuality Control Vs Quality Assurance - Difference Between QC and QA\r\nDefinition Of Quality Control and Quality Assurance\u00a0\r\n\r\nWhat is Quality?\r\n\r\nQuality is meeting the requirement, expectation, and needs of the customer being free from defects, lacks and substantial variants. There are standards needs to follow to satisfy the customer requirements.\r\n\r\nWhat is Quality Control?\r\n\r\n \tQuality control is that \u201cpart of quality management focused on fulfilling quality requirements.\u201d\r\n \tQuality Control is known as QC and focuses on identifying defect. QC ensures that the approaches, techniques, methods and processes are designed in the project are following correctly. QC activities monitor and verify that the project deliverables meet the defined quality standards.\r\n \tQuality Control is a reactive process and is detection in nature.. It recognizes the defects. Quality Control has to complete after Quality Assurance.\r\n\r\nWhat is Quality Assurance?\r\n\r\nQuality assurance consists of that \u201cpart of quality management focused on providing confidence that quality requirements will be fulfilled.\u201d The confidence provided by quality assurance is twofold\u2014internally to management and externally to customers, government agencies, regulators, certifiers, and third parties.\r\n\r\nQuality Assurance (QA) is the set of activities (including facilitation, training, measurement and analysis) needed to provide adequate confidence that processes are established and continuously improved in order to produce products or services that conform to requirements and are fit for use.\r\n\r\nAssurance is provided by organization management, it means giving a positive declaration on a product which obtains confidence for the outcome. It gives a security that the product will work without any glitches as per the expectations or requests.\r\n\r\nis known as QA and focuses on preventing defect. Quality Assurance ensures that the approaches, techniques, methods and processes are designed for the projects are implemented correctly. Quality assurance activities monitor and verify that the processes used to manage and create the deliverables have been followed and are operative.\r\n\r\nQuality Assurance is a proactive process and is Prevention in nature. It recognizes flaws in the process. Quality Assurance has to complete before Quality Control.\r\n\r\nqc vs qa\r\nDifference between quality assurance and quality control\r\n\n\n\n\n\tQuality ControlQuality Assurance \n\n\n\n\n\tQC is a process which deliberates on fulfilling the quality request.Quality Assurance is the process which deliberate on providing assurance that quality request will be achieved.\n\n\n\tquality control takes place after the final product is produced.Quality Assurance is pro-active which is just opposite of the Quality Control because quality assurance takes place at the time of development of the product\n\n\n\tIt's a Corrective techniqueIt's a Preventive technique\n\n\n\tQC confirms that the standards are followed while working on the productIn order to meet the customer requirements QA defines standards and methodologies\n\n\n\tQC ensures that whatever we have done is as per the requirement, and that is why it falls under validation activityQA ensures that everything is executed in the right way, and that is why it falls under verification activity\n\n\n\tIt requires involvement of Testing team\nIt requires involvement of the whole team\n\n\n\tStatistical technique applied on QC is known as SQC or Statistical Quality ControlStatistical technique applied on QA is known as SPC or Statistical Process Control (SPC)","headline":"Quality Control Vs Quality Assurance &#8211; Difference Between QC and QA","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2018-03-01","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2018\/03\/qc-vs-qa.jpg","height":279,"width":279},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/product-life-cycle-product-life-cycle-example/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2018/03/product-lifecycle-diagram.jpg')"></div><span class="sr-only">link to What Is Product Life Cycle &#8211; Product Life Cycle Example</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/product-life-cycle-product-life-cycle-example/">What Is Product Life Cycle &#8211; Product Life Cycle Example</a></p></header><div class="excerpt"><p>What Is Product Life Cycle - Product Life Cycle Example
Definition of 'Product Life Cycle'
Definition: Product life cycle (PLC) is the cycle through which every product goes through from...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/product-life-cycle-product-life-cycle-example/" aria-label="View Post: What Is Product Life Cycle &#8211; Product Life Cycle Example">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"What Is Product Life Cycle &#8211; Product Life Cycle Example","url":"\/\/www.gunkrazy.com\/product-life-cycle-product-life-cycle-example\/","articleBody":"What Is Product Life Cycle - Product Life Cycle Example\r\nDefinition of 'Product Life Cycle'\r\nDefinition: Product life cycle (PLC) is the cycle through which every product goes through from introduction to withdrawal or eventual demise.\r\nProduct life cycle introduction\r\nEvery product goes through a cycle from birth, followed by an initial growth stage, a relatively stable matured period, and finally into a declining stage that eventually ends in the death of the product as shown schematically in Figure\r\n\r\nA company\u2019s positioning and differentiation strategies must change as the product, market, and competitors change over the product life cycle(PLC). If we are saying product has life cycle then we have assert 4 attributes:\r\n\r\n \tProducts have a limited life .\r\n \tProduct sales pass through distinct stages, each posting different challenges, opportunities and problems to the seller\r\n \tProfits rise and fall at different stages of the product life cycle.\r\n \tProducts require different marketing, financial, manufacturing, purchasing, and human resource strategies in each life cycle stage.\r\n\r\nProduct Life cycle Diagram :\r\nproduct lifecycle diagram\r\n\r\n(1) Introduction stage:\r\n\r\nIn this stage the product is new and the customer acceptance is low and hence the sales are low.\r\n\r\n(2) Growth stage:\r\n\r\nKnowledge of the product and its capabilities reaches to a growing number of customers.\r\n\r\n(3) Maturity stage: \r\n\r\nThe product is widely acceptable and sales are now stable, and it grows with the same rate as the economy as a whole grows.\r\n\r\n(4) Decline stage:\r\n\r\nAt some point of time the product enters the decline stage. Its sales start decreasing because of a new and a better product has entered the market to fulfill the same customer requirements.\r\n\r\nProduct Lifecycle Example : NOKIA\u00a0\r\n\r\nNokia is a Finland based multinational company which was introduced during the year 1865 by Fredrik Idestam. Not many of us know this but Nokia started by producing cables, pulp and rubber. In 1992, Nokia launched it\u2019s Digi-handheld GSM phone, Nokia 1011. It didn\u2019t provide or launched a variety of models due to it\u2019s less demand and sale. Nokia sold both GSM as well as CDMA phones.\r\n\r\nproduct lifecycle of nokia\r\n\r\nGROWTH:\r\n\r\nAfter a lot of research Nokia then launched it\u2019s first phone without an antenna, Nokia 3210 on March 18, 1999. With more than 160 million units sold this model is one of the most popular and successful phones in history. When I-phone and Samsung came in competition, Nokia then launched phones like N95 to compete with them.\r\n\r\nMATURITY:\r\n\r\nDuring this stage, Nokia launched a lot of touch screen models, one of which was N-97 qwerty+touch which was huge success and the most profit was gained.\r\n\r\nDECLINE:\r\n\r\nNokia\u2019s poor product design and having it\u2019s main focus on Windows as it\u2019s OS, lead to it\u2019s decline. Nokia is going through this stage now.","headline":"What Is Product Life Cycle &#8211; Product Life Cycle Example","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2018-03-01","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2018\/03\/product-lifecycle-diagram.jpg","height":182,"width":258},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/slotter-machine-function-types-slotting-machine/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2018/02/slotting-machine-288x300.jpg')"></div><span class="sr-only">link to Slotter Machine Function -Types Of Slotting machine</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/slotter-machine-function-types-slotting-machine/">Slotter Machine Function -Types Of Slotting machine</a></p></header><div class="excerpt"><p>Slotter Machine Function -Types Of Slotting machine
A Slotting machine may also be known as heavy-duty shaper. Slotting machine resembles a shaping machine in all respect except that the ram instead...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/slotter-machine-function-types-slotting-machine/" aria-label="View Post: Slotter Machine Function -Types Of Slotting machine">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Slotter Machine Function -Types Of Slotting machine","url":"\/\/www.gunkrazy.com\/slotter-machine-function-types-slotting-machine\/","articleBody":"Slotter Machine Function -Types Of Slotting machine\r\nA Slotting machine may also be known as heavy-duty shaper. Slotting machine resembles a shaping machine in all respect except that the ram instead of reciprocating to and fro in the horizontal plane, moves up and down in the vertical plane. Therefore, the slotting machine is sometimes called as vertical shaper. In this article we will see slotter machine functions and types of slotting machine .\r\n\r\nSee also:\u00a0Major Shaping Machine parts and its Functions\r\nFunctions of Slotting Machine\r\nThe main function of a slotting machine is to remove metal from a piece of a work to bring it to the required shape and size. This is accomplished by holding the work rigidly on the machine and a reciprocating single point tool mounted on tool head. The single point tool moves along a vertical axis over the work piece. The pinion which is in mesh with the main gear gets its drive from a pulley through a belt by motor. The gear is coupled to the slotted disc. The circular motion of slotted disc is converted into the reciprocating one with the help of connecting rod. The crank pin can be formally set in the slot of slotted disc at different distances from the centre for verifying the length of the ram stroke. The position of the stroke is adjusted with the help of hand lever provided for the stroke adjustment. Slotting machine is usually provided with horizontal circular worktable, but coordinate tables are also provided some times. The table is mounted directly over a bed casting and heavy work may be placed on it. The circular table can be revolved by hand or power fed. It is graduated around its outer edges and work can thus be mounted and turned to a predetermined position, depending upon the function for which slotter is designed.\r\n\r\nslotting-machine\r\nTypes of Slotter Machine\r\nSlotting machines are mostly of the following four types:\r\n1. Precision Tool Room Slotter\r\n2. Puncher Slotter\r\n3. General Production Slotter\r\n4. Keyseater Slotter\r\n\r\n1. Precision Tool Room Slotter\r\nTool room slotter is precision type with is use for very precise machining. It is lighter machine and is operate at high speeds. By use special jigs machine can handle a number of equal works on a production basis.\r\n\r\n2. Puncher Slotter\r\nPuncher slotter is weighty machine and operational with powerful motor. It is propose to remove large quantity of metal as of large castings or forgings. Length of the stroke is too large.\r\n\r\n3. General Production Slotter\r\nProduction slotter is general type of slotter use for general production work. Drive of ram is by means of slotted disc with connecting rod. Fly wheel is fixed to prevent shock at the end of stroke.\r\n\r\n4. Keyseater Slotter\r\nKeyseaters, also identified as keyseating machines with keyway cutters, are specific machines designed to cut keyways. It is similar to vertical shapers; the dissimilarity is that cutting tool on a keyseater enters the work piece as of bottom and cuts on down-stroke, as the tool on a shaper enter the work piece as of the top and cuts downward. One more difference is a keyseater has a guiding system over the work piece to reduce deflection, which results in a closer tolerance cut. Process starts by clamping the work piece to the table by a fixture or vise.\r\nThis machine can cut other straight sided features other than keyways. They can also make blind slots, which are slots that do not enlarge through the whole work piece.","headline":"Slotter Machine Function -Types Of Slotting machine","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2018-02-27","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2018\/02\/slotting-machine-288x300.jpg","height":300,"width":288},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/carburizing-process-pack-liquid-gas-carburizing/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2018/02/pack-caarburizing-and-gas-carburizing-300x127.jpg')"></div><span class="sr-only">link to Carburizing Process &#8211; Types Of Carburizing heat treatment Process</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/carburizing-process-pack-liquid-gas-carburizing/">Carburizing Process &#8211; Types Of Carburizing heat treatment Process</a></p></header><div class="excerpt"><p>Carburizing Process - Types Of Carburizing heat treatment Process
Surface Hardening or Case Hardening:
The process by which the surface of an object or part can be made hard and leaving the...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/carburizing-process-pack-liquid-gas-carburizing/" aria-label="View Post: Carburizing Process &#8211; Types Of Carburizing heat treatment Process">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Carburizing Process &#8211; Types Of Carburizing heat treatment Process","url":"\/\/www.gunkrazy.com\/carburizing-process-pack-liquid-gas-carburizing\/","articleBody":"Carburizing Process - Types Of Carburizing heat treatment Process\r\nSurface Hardening or Case Hardening:\r\nThe process by which the surface of an object or part can be made hard and leaving the interior as it is, is called as surface or case hardening process. In many engineering applications, it is required that a steel being used should have a hard surface so that it can resist wear and tear. At the same time it should have soft and tough interior so that\u00a0steel is able to absorb any shocks, impact, etc. This is possible only when the surface is hard\u00a0while rest or interior of the metal is left as soft and ductile. This type of treatment is called surface hardening or case hardening and is applied to gears, ball bearings, railway wheels etc.\r\n\r\nSee also:\u00a0Introduction To Heat Treatment and Objectives Of Heat Treatments\r\n\r\nCarburizing Process: \r\n\r\nThe process of inducing of additional carbon to low carbon steels in order to give it a hard surface is known as carburizing. The surface is made hard only upto a certain depth using the any one of below:\r\n\r\npack carburizing and gas carburizing\r\n\r\ni) Pack or Solid Carburizing:\r\n\r\nThe article to be carburized is placed in a carburizing box and surrounded by solid carbonaceous materials\u2014usually a mixture of charcoal, leather, horn and barium carbonate as catalyst. The boxes are sealed with clay to exclude air and are placed in an oven or furnace where they are heated to a temperature between 900-950\u00b0C for several days depending upon the extent of carburizing action desired. In this way, carbon from the carburizing compound soaks or diffuses into the surface of the hot- steel. After carburizing, steel is reheated to a temperature just above its critical point followed by quenching in water, brine or oil. This hardens the skin and at the same time refines the core. This steel is also given a second heat treatment at a lower temperature range i.e. 750-770\u00b0C, in order to improve the ductility and\u00a0impact resistance of the core and case.\r\n\r\nii) Liquid Carburizing:\r\n\r\nThe articles to be carburized are heated in a container filled with a molten salt, such as sodium carbonate. If only selected portions of the components are to be\r\n carburized, then the remaining portions are covered by copper plating.\r\n\r\nAdvantages:\r\n\r\n(a) Very little deformation of article.\r\n (b) Time saving process.\r\n (c) Greater depth of penetration possible.\r\n (d) Selective carburizing is possible if needed.\r\n (e) Ease of carburizing a wider range of products\r\n (f) Uniform heating\r\n (g) Parts leave the bath with a clean and bright finish. There is no scale as there in pack hardening.\r\n\r\niii) Gas Carburizing:\r\n In gas carburizing, the article is heated and surrounded by a hydrocarbon gas (such as methane, ethane, carbon monoxide, etc) in the furnace.","headline":"Carburizing Process &#8211; Types Of Carburizing heat treatment Process","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2018-02-26","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2018\/02\/pack-caarburizing-and-gas-carburizing-300x127.jpg","height":127,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal no-thumb"><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/interview-questions-welding-technology-mechanical-students/">Interview questions on Welding Technology For Mechanical Students</a></p></header><div class="excerpt"><p>Interview questions on Welding Technology For Mechanical Students
In this article we wills see frequently asked questions related to welding while interview for mechanical Engineering Students and...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/interview-questions-welding-technology-mechanical-students/" aria-label="View Post: Interview questions on Welding Technology For Mechanical Students">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Interview questions on Welding Technology For Mechanical Students","url":"\/\/www.gunkrazy.com\/interview-questions-welding-technology-mechanical-students\/","articleBody":"Interview questions on Welding Technology For Mechanical Students\r\nIn this article we wills see frequently asked questions related to welding while interview for mechanical Engineering Students and Welding related job posts.\r\n1.What is Difference Between TIG and MIG ?\u00a0\r\nWhile Metal Inert Gas (MIG) and Tungsten Inert Gas (TIG) are both shielded arc welding applications, they are very different from one another. MIG welds are created with a consumable electrode, while TIG welds are created with a non-consumable electrode. TIG welding typically includes filler metal as well.\r\n\r\nTIG and MIG arc welding can both be automated. However, TIG is a more complicated process so the equipment is more expensive and difficult to set-up.\r\n\r\n2 . Why carbon dioxide is used as a shielding gas as it dissociates during welding and may contaminate the weld?\r\n\r\nCarbon dioxide has similar penetration characterstic as helium and is much cheaper when compared to inert gases. It is used in welding of ferrous metals only, mainly carbon steel( mild steel).\r\n\r\nDue to arc heat co2 disassociate into carbon monoxide and oxygen. The oxygen is released in small quantities and it's strength may vary a bit and co is released into atmosphere which is hazardous to the welder. Hence co2 has it's advantages and disadvantages\r\n\r\n3.\u00a0How does seam welding is differ from spot welding?\r\n\r\nSpot Welding\r\n\r\nSpot welding is most often used to connect metal parts that are usually around 3 mm thick. The material to be welded is put between two copper electrodes. Electric current flows through the material to weld the two metals while pressure on them is maintained.\r\n\r\nSeam Welding\r\n\r\nSeam welding is more complicated than spot welding. Two copper wheels replace the electrodes present in spot welding. The wheels create seams along two pieces of metal that bind them together. Seam welding is used to make items such as fuel tanks.\r\n\r\nSeam &amp; Spot Welding comes under resistance welding .The principle of operation is based on the joules law H= I^2Rt. The principal of operation remains same for both spot &amp; seam welding but the method of application differentiates each other.\r\n\r\n4.\u00a0What is fusion welding?\r\n\r\nIn case of fusion welding the metal to be welded, is heated up to molten state and re solidification results in completion of the weld. Examples: Arc welding, Gas welding, TIG welding, MIG welding etc.\r\n\r\nSEE ALSO :Classification Of Welding Processes and allied Processes\r\n\r\n5.\u00a0What is GTAW welding?\r\n\r\n \tGTAW is an abbreviation of Gas Tungsten Arc Welding. It is a type of arc welding in which the non consumable tungsten electrode is used.\r\n \tThe gas is used for shielding welding from atmosphere.the gas mostly used for this purpose is either argon or helium which are chemically inert.\r\n \tThere is no need for filler metal for welding thin materials but additional filler material used for welding thick plates.\r\n \tMostly pure tungsten is used as electrode because it has high melting point(3422 degree Celsius) .But for some cases the electrode contain 1 to 2% thorium this electrode is known as thoriated Tungsten electrode this electrode is manitain the arc stable.\r\n\r\n6.\u00a0What are the main factors affecting the welding design?\r\n\r\nSeveral factors affect the design of any weldment or any welding process, to be rather specific.\r\n\r\nThese include:\r\n1. The material going to be welded. In this context, several other interlinked issues also come into play, like, is it going to a weld between similar materials, are they homogeneous etc.\r\n\r\n2. Nature of the process: like RSW, FSW, Manual Metal Arc, MIG etc.\r\n\r\n3. Dimensions of the workpiece\r\n\r\n4. Length of the weldment etc.\r\n\r\n5. Will filler materials be used?\r\n\r\n6. The orientation of the joint: Overhead or vertical or transverse?\r\n\r\n7.\u00a0What are the different reasons for welding defects?\r\n\r\nMost weld defects are the welders fault at the end of the day, and I would say almost all weld defects are from inexperience. Things like being able to control:\r\n\r\nundercut (incorrect amp settings\/rod angle or inclination)\r\n\r\nporosity (dirty base metal\/too long of an arc\/environmental factors like wind)\r\n\r\ncold lapping\/lack of fusion (not keeping the arc on the leading edge of the puddle with MIG. Or not maintaining the proper arc length with stick)\r\n\r\nWelding defects\r\n\r\nIncomplete penetration (caused by improper fit up, too tight of a gap. Or too low of an amp setting\r\n\r\nSlag inclusion (trying to fill too much at once, or weaving a bead too wide, not maintaining proper arc length)\r\n\r\nAll of these problems (especially improper fit up) will go away as you learn and grow in the trade. And with enough experience most defects can be avoided. The most important things to keep in mind are rod angle\/inclination, good gap\/fit, and proper settings.\r\n\r\nSEE ALSO:\u00a07 Most Common Defects In Welding and its causes\r\n\r\n8.\u00a0What is the difference between SMAW and MIG?\r\n\r\nSMAW means Shieled Metal Arc Welding and MIG means Metal Inert Gas welding .\r\n\r\nIn SMAW flux cored electrode is used for welding and when arc generates , gases generated by burning of flux protects Arc of the welding and\r\n\r\nIn MIG Inert gas is flowed around the arc generated by bare electrode of same as metal being welded. Inert gases are like argon and helium is used for shielding .\r\n\r\n9.\u00a0What do you mean by cold welding?\r\n\r\nCold welding or contact welding is a solid-state welding process in which joining takes place without fusion\/heating at the interface of the two parts to be welded. Unlike in the fusion-welding processes, no liquid or molten phase is present in the joint.\r\n\r\nCold welding was first recognized as a general materials phenomenon in the 1940s. It was then discovered that two clean, flat surfaces of similar metal would strongly adhere if brought into contact under vacuum. Newly discovered micro- and nano-scale cold welding has already shown great potential in the latest nanofabrication processes.\r\n\r\n10.\u00a0What is the meaning of slag when welding?\r\n\r\nIts is the combo of carbonate and silicate material, when the heat produces and reaches to the weld zone then slag formed in flux and produce gases that push it back , preventing purpose.","headline":"Interview questions on Welding Technology For Mechanical Students","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2018-02-26","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"","height":0,"width":0},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <article class="article-card horizontal "> <a href="//www.gunkrazy.com/biogas-compression-storage-system-cooking-applications-rural-households/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2018/02/Biogas-Compression-and-Storage-System-for-Cooking-Applications-300x214.jpg')"></div><span class="sr-only">link to Biogas Compression and Storage System for Cooking Applications in Rural Households</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/biogas-compression-storage-system-cooking-applications-rural-households/">Biogas Compression and Storage System for Cooking Applications in Rural Households</a></p></header><div class="excerpt"><p>Biogas Compression and Storage System for Cooking Applications in Rural Households
Abstract-  A project is undertaken by the College of Engineering Bhubaneswar, Odisha, India to design and...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/biogas-compression-storage-system-cooking-applications-rural-households/" aria-label="View Post: Biogas Compression and Storage System for Cooking Applications in Rural Households">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Biogas Compression and Storage System for Cooking Applications in Rural Households","url":"\/\/www.gunkrazy.com\/biogas-compression-storage-system-cooking-applications-rural-households\/","articleBody":"Biogas Compression and Storage System for Cooking Applications in Rural Households\r\nAbstract- \r\n\r\nA project is undertaken by the College of Engineering Bhubaneswar, Odisha, India to design and develop a biogas production, purification, compression and storage system suitable for the use as a cooking gas in rural households. The biogas is produced in a floating drum type digester by the anaerobic digestion of kitchen wastes and collected by an elastic balloon. A foot lever compressor is designed, which allows the users to stand and compress using foot lever and a valve system. The final prototype is able to compress the biogas to approximately 4bar in a 0.5m3 tank. In addition to the compressor, a container with silica gel is used for removal of water vapour from Biogas and there is also a fibre container with steel wool to act as a hydrogen sulfide scrubber in-line with the inlet of the biogas to the compression system. The result showed that the system could compress biogas into a container, 4 bar pressure and operating time of 30 min.\r\nIntroduction\r\nBiogas is becoming an increasingly important source of energy for rural areas in developing countries due to readily available organic wastes like kitchen wastes. Biogas has advantage in terms of low cost sustainable energy. Biogas is an appropriate alternative to the traditional solid and gaseous cooking fuels used by developing rural communities. Biogas digester is used to collect kitchen wastes and convert it to biogas through anaerobic digestion processes. Biogas is a clean-burning, renewable fuel that contains 50-60% methane and can be used in household cooking applications . Without an appropriate method of compression, the gas remains of a large volume and it is difficult for transport and storage.\r\nThe aim of the project is to design a system to compress and store the biogas in such a way that it will be suitable for cooking gas in rural communities. For compression of biogas we have designed a piston cylinder system i.e a modified bicycle pump which is the best compression method due to its low cost and can reach the\u00a0required pressure within a short time. We have taken an air tank which is the suitable storage container for biogas.\r\n\r\nBiogas Compression and Storage System for Cooking Applications\r\n\r\nNeed of compression and storage of Biogas\r\nLarge quantities of kitchen wastes are available at rural households. But no efforts have been made to use these wastes for the purpose of production of energy. Effort was made to use this Biogas as a source of cooking with the help of bio digesters. Due to smaller size of the plants and improper handling, the output of the gas was limited and irregular. It has always been considered only as a stand by alternative arrangement. Therefore, compression and storage system has been proposed to use the Biogas from digesters. Biogas is purified, compressed and stored in LPG cylinder which makes it easy to transport for use.\r\n\r\nCompression mechanism\r\nThe design is established as inclined \u201cfoot pump\u201d mechanism using bicycle pumps\r\n\r\nFoot compressor\r\nOur project aims at high pressure gas storage system in a pressure vessel for storing compressed gas as low cost energy. A foot compressor is built for portable service and is different from common type of reciprocating compressor. This compressor has its\u2019 size of smallest capacity of single stage to deliver 0.015m3\/min and the delivery pressure is up to 4bar.\r\n\r\nWorking Principle\r\nThe foot compressor design includes two cylinders that are supported to stand by a simple frame, based on foot-operated design (Fig.5). With this design, the container is kept stationary, which is stable and the\u00a0cylinders move with the lever. The lever arm acts to give mechanical advantage and moves the two plungers through the body of the cylinders. The two cylinders are used with on-off valves to compress the biogas alternately. The valve system connects the two cylinders and allows for the variable operation of the system. The cylinders are connected in parallel, and each has two valves. One of these valves controls flow from the storage balloon, the other controls the flow of biogas to the inlet of the storage tank. Once the tank contains enough compressed gas, compression will become difficult and some of the cylinders can be disengaged in order to make pumping easier. In order to disengage a cylinder the biogas valve should be placed in the \u201coff\u201d position so that biogas is not pulled into that branch of the system.\r\n\r\nConclusion\r\nOur research work proves that biogas production, compression and storage system is a profitable venture for the rural households where large quantities of kitchen wastes are available. It is proved that biogas can be compressed, stored in LPG cylinder and made transportable. To make biogas suitable for cooking application it is compressed up to 4 bar after purification, moisture removal and filled in LPG cylinder. In addition to the energy production, biogas plant also provides organic manure and is helpful in dealing with the problems of waste disposal and pollution free environment. We determined that the most feasible compression method is a bicycle pump. We also determined that a standard air tank is ideal for this application because it is easily available, less expensive, portable with standard fittings and resists corrosion from the biogas. Our final design was fabricated using very simple and conventional construction processes. It was constructed in a very short time of 2 to 3 days. Also, the cost of our final prototype is around Rs.3, 000\/ when assembled without the biogas digester.\r\n\r\nReference And Download Report Paper:\u00a0\r\n\r\nBiogas Compression and Storage System for Cooking Applications in Rural Households","headline":"Biogas Compression and Storage System for Cooking Applications in Rural Households","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2018-02-25","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2018\/02\/Biogas-Compression-and-Storage-System-for-Cooking-Applications-300x214.jpg","height":214,"width":300},"publisher":{"@context":"http:\/\/schema.org\/","@type":"Organization","name":"Learn Mechanical Engineering","logo":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2020\/01\/learn-mech-logo-1-300x300.png","height":600,"width":60}}}</script> <nav class="pagination-wrapper" aria-label="article pagination"> <a class="prev page-numbers" href="?page_num=204">&laquo; PREV</a> <a class="page-numbers" href="?page_num=1"><span class="screen-reader-text">Page </span>1</a> <span class="page-numbers dots">&hellip;</span> <a class="page-numbers" href="?page_num=203"><span class="screen-reader-text">Page </span>203</a> <a class="page-numbers" href="?page_num=204"><span class="screen-reader-text">Page </span>204</a> <span aria-current="page" class="page-numbers current"><span class="screen-reader-text">Page </span>205</span> <a class="page-numbers" href="?page_num=206"><span class="screen-reader-text">Page </span>206</a> <a class="page-numbers" href="?page_num=207"><span class="screen-reader-text">Page </span>207</a> <span class="page-numbers dots">&hellip;</span> <a class="page-numbers" href="?page_num=338"><span class="screen-reader-text">Page </span>338</a> <a class="next page-numbers" href="?page_num=206">NEXT &raquo;</a></nav></section></main><aside id="secondary" class="widget-area"><div class="about-wrapper"><h2 class="widget-title" style="background: #d693c6; color: #ff392e">About Us</h2><div class="about-image" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2020/03/Sachin-Thorat-300x300-min.png')"></div><p class="about-copy">LearnMech.Com is a Mechanical Project-oriented platform run by Sachin Thorat who is a B-Tech Graduate in Mechanical Engineering. 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