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Types, Working, Characteristics, Diagram, Advantages</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/what-is-comparators-in-metrology/">Comparators in Metrology &#8211; Types, Working, Characteristics, Diagram, Advantages</a></p></header><div class="excerpt"><p>Introduction to Comparator :   Comparators are one form of the linear measurement device.
 It is quick and more convenient for checking a larger number of identical dimensions.
 Comparators...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/what-is-comparators-in-metrology/" aria-label="View Post: Comparators in Metrology &#8211; Types, Working, Characteristics, Diagram, Advantages">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Comparators in Metrology &#8211; Types, Working, Characteristics, Diagram, Advantages","url":"\/\/www.gunkrazy.com\/what-is-comparators-in-metrology\/","articleBody":"Introduction to Comparator :\u00a0\r\n\r\n \tComparators are one form of the linear measurement device.\r\n \tIt is quick and more convenient for checking a larger number of identical dimensions.\r\n \tComparators normally will not show the actual dimensions of the workpiece. They will show only the deviation in size.\r\n \tThis cannot be used as an absolute measuring device but can only compare two dimensions.\r\n\r\nPrinciple of comparator\r\nThe general principle of the comparator is to indicate the difference in size between the standard and work being measured by means of some pointer on the scale with sufficient magnification.\r\n\r\nComparators can give precision measurements, with consistent accuracy by eliminating human error. They are employed to find out, by how much the dimensions of the given component differ from that of a known datum. If the indicated difference is small, a suitable magnification device is selected to obtain the desired accuracy of measurements. It is an indirect type of instrument and used for linear measurement. If the dimension is less or greater, than the standard, then the difference will be shown on the dial. It gives only the difference between the actual and standard dimension of the workpiece. To check the height of the job H2 ,with the standard job of height H1\r\n\r\n\r\n\r\n\r\nprinciple Of Comparators\r\n\r\nInitially, the comparator is adjusted to zero on its dial with a standard job in position as shown in Figure(a). The reading H1 is taken with the help of a plunger.\r\n\r\nThen the standard job is replaced by the work-piece to be checked and the reading H2 is taken. If H1and H2 are different, then the change in the dimension will be shown on the dial of the comparator. Thus the difference is then magnified 1000 to 3000 X to get a clear variation in the standard and actual job.\r\nDefinition of Comparators :\r\n\r\nIn short, Comparator is a device which\r\n(1) Picks up small variations in dimensions.\r\n(2) Magnifies it.\r\n(3) Displays it by using indicating devices, by which comparison can be made with some standard value.\r\n\r\n\r\n\r\nNeed for a comparator\r\n\r\n \tA comparator is used in mass production to inspect the components to close tolerance with a high degree of precision and speed\r\n \tUse of line standards such as vernier caliper and micrometer required considerable skill\r\n \tMany dimensions can be checked in a very short time.\r\n\r\n\r\n\r\nClassification of Comparators\r\n1. Mechanical Comparator: It works on gears pinions, linkages, levers, springs, etc.\r\n2. Pneumatic Comparator: Pneumatic comparator works by using high-pressure air, valves, back pressure, etc.\r\n3. Optical Comparator: Optical comparator works by using lens, mirrors, light source, etc.\r\n4. Electrical Comparator: Works by using step up, step down transformers.\r\n5. Electronic Comparator:It works by using an amplifier, digital signal, etc.\r\n6. Combined Comparator: The combination of any two of the above types can give the best\u00a0result.\r\nTypes Of Comparators :\r\n1. Mechanical comparators\r\n\r\n \tDial Indicator\r\n \tReed Type comparator\r\n \tSigma Comparator\r\n \tJohansson Mikrokator\r\n\r\n2. Mechanical Optical Comparators\r\n\r\n \tOptical Lever\r\n \tZeiss Optimeter\r\n \tZeiss Ultra Optimeter\r\n \tZeiss Optotest Comparators\r\n\r\n3. Electrical and Electronics Comparators\r\n4. Pneumatic Comparators\r\n5) Fluid Displacement Comparators\r\n6) Projection Comparators\r\n7) Multi check Comparators\r\n8) Automatic Gauging\r\n9) Electro-Mechanical Comparators\r\n10) High Sensitive Calibration Comparators\r\n\r\n \tBrookes Level Comparators\r\n \tEden-Rolt Millionth Comparators\r\n\r\n\r\n\r\nCharacteristics of Good Comparators:\r\n1. It should be compact.\r\n2. It should be easy to handle.\r\n3. It should give a quick responses or quick results.\r\n4. It should be reliable, while in use.\r\n5. There should be no effects of the environment on the comparator.\r\n6. Its weight must be less.\r\n7. It must be cheaper.\r\n8. It must be easily available in the market.\r\n9. It should be sensitive as per the requirement.\r\n10. The design should be robust.\r\n11. It should be linear in scale so that it is easy to read and get a uniform response.\r\n\r\n\r\n12. It should have less maintenance.\r\n13. It should have a hard contact point, with long life.\r\n14. It should be free from backlash and wear.\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nMechanical Comparators :\u00a0\r\nWorking Principle of Mechanical comparators:\r\nThe magnification of plunger movement can be obtained mechanical means such as levers, gear and pinion arrangement, or other mechanical means.\r\nJOHANSSON \u201cMIKROKATOR:\r\n\r\n \tJohansson \u201cMikrokator\u201f is a mechanical comparator having a magnification of about 5000.\r\n \tIt works on the principle of a button spinning on a loop of string.\r\n \tThe instrument consists of a plunger, twisted thin metal strip, spring elbow, pointer, etc.\r\n \tA very light glass pointer is attached to the Centre of the twisted strip.\r\n \tThe two halves of the strip from the Centre are twisted in opposite directions, so that any pull in the strip causes the Centre and hence the pointer to rotate.\r\n\r\nJOHANSSON MIKROKATOR DIAGRAM\r\n\r\n \tOne end of the strip is fixed to an adjustable cantilever strip and the other end is attached to an arm of spring elbow.\r\n \tThe measuring plunger is mounted on a flexible diaphragm. Its inner end is attached to the other arm of spring elbow.\r\n \tThus the vertical movement of the plunger transmitted to the metal strip through the elbow.\r\n \tAny vertical movements of the plunger make it to twist or untwist.\r\n \tThis will cause the pointer to rotate by an amount proportional to the change in the length of the strip\r\n \tMagnification of the instrument depends upon the length, width, and a number of twists of the twisted strip.\r\n \tIt can vary by changing the length of the strip with screws provided on adjustable cantilever strip.\r\n\r\nSIGMA COMPARATOR:\r\n\r\n \tThis is a mechanical comparator providing magnification in 300 to5000.\r\n \tIt consists of a plunger mounted on two steel strings (slit diaphragms). This provides a frictionless linear movement for the plunger.\r\n \tThe plunger carries a knife-edge, which bears upon the face of the moving block of a cross-strip hinge.\r\n \tThe cross-strip hinge is formed by pieces of flat steel springs arrange at right angles and is a very efficient pivot for smaller angular movements.\r\n \tThe moving block carries light metal Y-forked arms. A thin phosphor bronze ribbon is fastened to the ends of the forked arms and wrapped around a small drum, mounted on a spindle carrying the pointer.\r\n \tAny vertical displacement of measuring plunger and hence that of the knife-edge makes the moving block of the cross-strip hinge to pivot.\r\n\r\nSigma comparator diagram\r\n\r\n \tThis causes the rotation of the Y-arms. The metallic band attached to the arms makes the driving drum and hence the pointer to rotate.\r\n \tThe ratio of the effective length (L) of the arm and the distance (X) of the knife edge from the pivot gives the first stage magnification\r\n \tThe ratio of pointer length (R) and radius r of the driving drum gives second stage magnification of the instrument.\r\n \tThe total magnification of the instrument is thus (L\/X\u00d7 R\/r).\r\n \tThe magnification of the instrument can be varied by changing the distance (X) of knife-edge by tightening or slackening of the adjusting screws.\r\n\r\nAdvantages of Mechanical Comparators\r\n\r\n \tThey are cheaper compared to other amplifying devices.\r\n \tDo not require electricity or air and such the variations in the outside sources do not affect the accuracy.\r\n \tThey have a linear scale robust and easy to handle.\r\n \tIt is suitable for ordinary workshop and also easily portable.\r\n\r\nDisadvantages of Mechanical Comparators\r\n\r\n \tThey have more moving linkages, due to which friction is more and accuracy is low.\r\n \tAny wear, dimensional faults in the mechanical devices used will also be magnified.\r\n \tThe range of the instrument is limited because the pointer moves over a fixed scale\r\n\r\nOPTICAL COMPARATOR\r\nIntroduction\r\n\r\nThere are no pure optical comparators but the instruments classed as optical comparators obtain large magnification in these instruments contributes principles through mechanical magnification\r\nAll-optical comparators are capable of giving a high degree of measuring precision.\r\nWorking principle of Optical comparators:\r\nThe operating principle of this type, of the comparator, is based on the laws of light reflection and refraction. The magnification system depends on the tilting of a mirror, deflects a beam of light, thus providing an optical lever.\r\nPrinciple of the optical lever\r\nIf a beam of light AC is directed on to a mirror as shown in the figure, it will be reflected onto the screen at O as a dot.The angle \u019f at which the beam strikes the mirror is equal to the angle \u019f at which the beam is reflected from the mirror. When the plunger moves upwards vertically, causing the mirror to tilt by an angle \u201e\u03b1\u201f as shown in the figure.\r\n\r\nprinciple of optical comparator\r\n\r\nThen the reflected light beam moves through an angle \u201c2\u03b1\u201d which is twice the angle of tilt produced by the plunger movement. The illuminated dot moves to \u201cB\u201d thus a linear movement \u201ch\u201d of the plunger produces a movement of the dot equivalent to the distance OB on the screen. It also clear that as the distance (OC) of the screen from tilting mirror increases, greater will be the magnification and is called the principle of enlarge image.\r\nZeiss ultra- Optimeter\r\n\r\n \tThe optical system of this instrument involves a double reflection of light and thus gives a higher degree of magnification.\r\n \tA lamp sends light rays through the green filter to filter all rays except green light, which causes less fatigue to the eye.\r\n \tThe green light then passes through a condenser which via an index mark projects it on to a movable mirror M1. It is then reflected to another fixed mirror M2 and back again to the first movable mirror.\r\n \tThe objective lens brings the reflected beam from the movable mirror to a focus at a transparent graticule containing a precise scale that is viewed by eye-piece.\r\n \tThe projected image of the index line on the graticule can be adjusted by means of a screw in order to set the initial zero reading.\r\n \tWhen correctly adjusted, the image of the index line is seen against that of the graticule scale.\r\n \tThe end of the contact plunger rests against the other end of the first movable mirror so that any vertical movement of the plunger will tilt the mirror.\r\n \tThis causes a shift in the position of the reflected index line on the eyepiece graticule scale, which in turn measures the displacement of the plunger.\r\n\r\nZeiss ultra- Optimeter diagram\r\nAdvantages of optical comparators :\u00a0\r\n\r\n \tOptical comparators have few moving linkages and hence are not subjected to friction, wear, and tear.\r\n \tHigh accuracy of the measurement.\r\n \tThe magnification is usually high.\r\n\r\nDisadvantages of optical comparators\u00a0\r\n\r\n \tAn electrical supply is necessary to operate these types of comparators.\r\n \tThe size of these comparators are highly, and costly.\r\n \tSince the scale is projected on a screen, it is essential to use these instruments in a dark room in order to take the readings easily.\r\n\r\nPneumatic Comparators :\r\n\r\n \tThese instruments utilize the variations in the air pressure or velocity as an amplifying medium.\r\n \tA jet or jets of air are applied to the surface being measured and the variations in the backpressure or velocity of air caused due to variations in loused to amplify the output signals.\r\n \tBased on the physical phenomena, the pneumatic comparators are classified into two types.\r\nFlow or velocity type\r\nBackpressure type.\r\n\r\nSolex Pneumatic Comparator:\r\n\r\n \tThis instrument was first commercially introduced by Solex Air. Gauges Ltd. It uses a water manometer for the indication of backpressure.\r\n \tIt consists of a vertical metal cylinder filled with water up to a certain level and a dip tube immersed into it up to a depth corresponding to the air pressure required.\r\n\r\nSolex pneumatic gauge diagram\r\n\r\n \tA calibrated manometer tube is connected between the cylinder and control orifice as shown in the fig.\r\n \tThe pressure of the air supplied is higher than the desired pressure, some air will bubble out from the bottom of the dip tube and air moving to the control volume will be at the desired constant pressure.\r\n \tThe constant pressure air then passes through the control orifice and escapes from the measuring jets.\r\n \tWhen there is no restriction to the escape of air, the level of water in the manometer tube will coincide with that in the cylinder.\r\n \tBut, if there is a restriction to the escape of air through the jets, back pressure will be induced in the circuit and level of water in the manometer tube will fall.\r\n \tThe restriction to the escape of air depends upon the variations in the dimensions to be measured.\r\n \tThus the variations in the dimensions to be measured are converted into corresponding pressure variations, which can be read from the calibrated scale provided with the manometer.\r\n\r\nAdvantages of Pneumatic Comparators\u00a0 :\r\n1. Very high magnification\r\n2. Less friction, wear, and inertia\r\n3. Less measuring pressure\r\n4. Determines ovality and taper of circular bores\r\nDisadvantages of pneumatic comparators :\r\n1. Scale is generally not uniform\r\n2. Requires compressor and accurate pressure regulator\r\n3. Nonportable\r\n4. Less sensitivity\r\n\r\n\r\n\r\nDifference between Mechanical Comparator and Pneumatic Comparators\r\n\n\n\n\n\tMechanical ComparatorPneumatic Comparator\n\n\n\n\n\t1) Mechanical comparators are robust and compact in design.Pneumatic Comparators are not portable and compact in design\n\n\n\t2) Usually the Mechanical comparators have a linear scale.The scale is generally not linear\n\n\n\t3) Due to more moving parts, the friction is more which reduces the accuracy.It has few numbers of moving parts and in some cases none. Thus the accuracy obtained is more due to the absence of friction and inertia.\n\n\n\t4) Less degree of magnification as compared to pneumatic comparators.It is possible to obtain a high degree of magnification\n\n\n\t5) Less costlier as compared to other comparators.Cost is high as compared to mechanical comparators\n\n\n\n\r\n\r\n\r\n\r\nElectrical comparator\r\nWorking principle of Electrical comparators:\r\n\r\nThese instruments are based on the theory of Wheatstone A.C. Bridge. When the bridge is electrically balanced, no current will flow through the galvanometer connected to the bridge, and the pointer will not deflect. Any upset in the inductances of the arms will produce unbalance and cause deflection of the pointer.\r\n\r\nIntroduction\r\n\r\n \tElectrical comparators are also called as electromechanical measuring systems.\r\n \tThis is because they use an electro-mechanical device that converts mechanical displacement into an electrical signal.\r\n\r\nLVDT\r\nLinear Variable Differential Transformer (LVDT) is the most popular electro-mechanical device used to convert mechanical displacement into an electrical signal. It is used to measure displacement.\r\n\r\nRead More about LVDT:\u00a0LVDT - Diagram, working, Characteristics, Advantages, Application\r\nAdvantage of electrical comparator\r\n\r\n \tA small number of moving parts.\r\n \tPossible to have very high magnification.\r\n \tUsed for a variety of ranges.\r\n \tRemote operation can also be done.\r\n\r\nThe disadvantage of electrical comparator\r\n\r\n \tRequired an external agency to operate i.e., A.C .power supply. 10\r\n \tHeating coils may cause zero drift.\r\n \tMore expansive than the mechanical comparator.\r\n\r\n\r\n\r\n\r\nDifference between Gauges and Comparators :\u00a0\r\nComparison between gauges and comparators are as follows,\u00a0\r\n\r\n\n\n\n\n\tSr. No. GaugesComparator\n\n\n\n\n\t1.Gauge is device designed to compare the manufactured component against the given drawing.Comparator is device designed to compare knownknown, known \u2013 unknown, unknown- unknown parameters.\n\n\n\t2.The gauge can only verify the manufactured component is accepted or rejected.Comparator gives the readings of measurement of the manufactured component.\n\n\n\t3.Low in costMore in cost\n\n\n\t4.Easy to use on the shop floorNeeds pneumatic or other sources to use on shop floor\n\n\n\t5.Limited range of applicationLarge range of application\n\n\n\t6.Example- Ring gauges, Plug gauges, Snap gaugesExample - Pneumatic, Electrical, Mechanical comparators\n\n\n\n\r\n\r\n\r\n\r\nDifference between Measuring Instruments and Comparators :\r\nComparison between measuring instrument and comparators are as follows,\r\n\r\n\n\n\n\n\tSr. no.Mechanical InstrumentComparator\n\n\n\n\n\t1.It is not give any magnification.It gives magnification.\n\n\n\t2.Skilled operators are required.Semi-skilled operators are required.\n\n\n\t3.Observational error is occur.Parallax error is occur.\n\n\n\t4.Maintenance is less.Maintenance is more.\n\n\n\t5.The remote controlling is not possible.It may be operate by remote.\n\n\n\t6.A Uniform response is not obtained.Uniform response is obtained.\n\n\n\t7.Used for checking and measurement.Used for comparsion.\n\n\n\t8.Less sensitive.More sensitive.\n\n\n\t9.Example. Vernier caliperExample: Sigma comparator, Dial Indicator\n\n\n\n\r\n\r\n\r\n\r\nApplications of Comparators :\u00a0\r\nComparators are used for Following purposes :\u00a0\r\n\r\n1) Comparators are used as laboratory standards.\r\n2) Used as working gauges to prevent work spoilage and to maintain required tolerance at all\r\nimportant stages of manufacture.\r\n3) Used as final inspection gauges.\r\n4) Used as a receiving inspection gauge for checking parts received from outside sources.\r\n5) For checking newly purchase gauges.\r\n\r\n\r\n\r\n&nbsp;","headline":"Comparators in Metrology &#8211; Types, Working, Characteristics, Diagram, Advantages","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-04-22","mainEntityOfPage":"False","dateModified":"May 26, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/04\/solex-pneumatic-gauge-diagram-300x146.jpg","height":146,"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 "> <a href="//www.gunkrazy.com/what-is-flywheels-function-need-and/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2017/04/WhatisFlywheels-FunctionneedandOperation-300x290.jpg')"></div><span class="sr-only">link to What is Flywheels-Function need and Operation</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/what-is-flywheels-function-need-and/">What is Flywheels-Function need and Operation</a></p></header><div class="excerpt"><p>What is Flywheels-Function need and Operation
What is the purpose of a flywheel in an automobile engine?  Flywheel
A flywheel is an inertial energy-storage device. It absorbs mechanical energy...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/what-is-flywheels-function-need-and/" aria-label="View Post: What is Flywheels-Function need and Operation">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"What is Flywheels-Function need and Operation","url":"\/\/www.gunkrazy.com\/what-is-flywheels-function-need-and\/","articleBody":"What is Flywheels-Function need and Operation\r\nWhat is the purpose of a flywheel in an automobile engine?\r\n\r\nFlywheel\r\nA flywheel is an inertial energy-storage device. It absorbs mechanical energy and serves as a reservoir, storing energy during the period when the supply of energy is more than the requirement and releases it during the period when the requirement of energy is more than the supply.\r\n\u00a0\r\nFlywheels-Function need and Operation\r\nThe main function of a fly wheel is to smoothen out variations in the speed of a shaft caused by torque fluctuations. If the source of the driving torque or load torque is fluctuating in nature, then a flywheel is usually called for. Many machines have load patterns that cause the torque time function to vary over the cycle. Internal combustion engines with one or two cylinders are a typical example. Piston compressors, punch presses, rock crushers etc. are the other systems that have fly wheel.\r\nFlywheel absorbs mechanical energy by increasing its angular velocity and delivers the stored energy by decreasing its velocity.\r\n\r\n\r\n\r\n\r\n\r\nWhat is Flywheels-Function need and Operation\r\n\r\n\r\n\r\n\r\nDesign Approach\r\n\r\n\r\nThere are two stages to the design of a flywheel. First, the amount of energy required for the desired degree of smoothening must be found and the (mass) moment of inertia needed to absorb that energy determined.\r\nThen flywheel geometry must be defined that caters the required moment of inertia in a reasonably sized package and is safe against failure at the designed speeds of operation.\r\n\r\n\r\nCommon uses of a flywheel include:\r\n\r\n\r\n\r\n \tProviding continuous energy when the energy source is discontinuous. For example, flywheels are used in reciprocating engines because the energy source, torque from the engine, is intermittent.\r\n \tDelivering energy at rates beyond the ability of a continuous energy source. This is achieved by collecting energy in the flywheel over time and then releasing the energy quickly, at rates that exceed the abilities of the energy source.\r\n \tControlling the orientation of a mechanical system. In such applications, the angular momentum of a flywheel is purposely transferred as a torque to the attaching mechanical system when energy is transferred to or from the flywheel, thereby causing the attaching system to rotate into some desired position.\r\n \tFlywheels are often used to provide continuous energy in systems where the energy source is not continuous. In such cases, the flywheel stores energy when torque is applied by the energy source, and it releases stored energy when the energy source is not applying torque to it.\u00a0\r\n \tFor example, a flywheel is used to maintain constant angular velocity of the crankshaft in a reciprocating engine. In this case, the flywheel\u2014which is mounted on the crankshaft\u2014stores energy when torque is exerted on it by a firing piston, and it releases energy to the crankshaft when a piston is in the process of compressing a fresh charge of air and fuel.\u00a0\r\n \tOther examples of this are friction motors, which use flywheel energy to power devices such as toy cars. In uses like this, the distribution of the mass of the flywheel toward the outside and away from the center is beneficial. Pushing the mass away from the axis of rotation gives it greater rotational inertia without increasing its total mass. This increases the efficiency of the flywheel, since it does not have as much difficulty driving its own weight forward as well as that of the payload\r\n.","headline":"What is Flywheels-Function need and Operation","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-04-21","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/04\/WhatisFlywheels-FunctionneedandOperation-300x290.jpg","height":290,"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 "> <a href="//www.gunkrazy.com/workshop-technology-viva-objective/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2017/04/WorkshopTechnologyViva2CObjectivequestionsForMechanicalStudents-300x184.jpg')"></div><span class="sr-only">link to Workshop Technology Viva ,Objective questions For Mechanical Students</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/workshop-technology-viva-objective/">Workshop Technology Viva ,Objective questions For Mechanical Students</a></p></header><div class="excerpt"><p>Workshop Technology Viva ,Objective questions with Answers For Mechanical Students   Q.1 What is the importance of workshop?  ANS:- Workshop is the center of learning about engineering...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/workshop-technology-viva-objective/" aria-label="View Post: Workshop Technology Viva ,Objective questions For Mechanical Students">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Workshop Technology Viva ,Objective questions For Mechanical Students","url":"\/\/www.gunkrazy.com\/workshop-technology-viva-objective\/","articleBody":"Workshop Technology Viva ,Objective questions with Answers For Mechanical Students\u00a0\r\n\r\n\r\nQ.1 What is the importance of workshop?\r\n\r\nANS:- Workshop is the center of learning about engineering Materials, manufacturing practices, equipments, tools and safety precaution to be observed in manufacturing operations.\r\nFor practical knowledge and skills workshop is of importance.\r\n\u00a0\r\n\r\n\r\nQ.2 Name the various shop coming under common shops?\r\n\r\n\r\nANS:- (i) Carpentry and pattern making shop\r\n(ii) Bench work and fitting shop\r\n(iii) Foundry and casting\r\n(iv) Smithy and forging\r\n(v) Sheet metal\r\n(vi) Electric arc and gas welding\r\n(vii) Machine shop\r\n\r\n\r\n\r\n Workshop Technology Viva ,Objective questions For Mechanical Students\r\n\r\n\r\n\r\n\r\nQ.3 Which are Special shops?\r\n\r\nANS:- (i) Electrical wiring, soldering,and electronic\r\n\r\n\r\n(ii) Painting\r\n(iii) Heat treatment\r\n(iv) Plumbing\r\n(v) Automobile\r\n(vi) Refrigeration, Air conditioner\r\n(vii) Material testing\r\n\u00a0\r\n\r\n\r\nQ.5 Name the machines you know?\r\n\r\n\r\nANS:- (i) Hacksaw machine\r\n(i) Lathe machine\r\n(iii) shaping machine\r\n(iv) Drilling machine\r\n(v) Slotting\r\n(vi) Bench grinder\r\n(vii) Press machine\r\n(viii) Milling machine\r\n\u00a0\r\n\r\n\r\nQ.6 \u00a0Name of any five measuring instruments?\r\n\r\n\r\nANS:- (i) Try square\r\n(ii) Vernier caliper\r\n(iii) Micrometer\r\n(iv) Divider\r\n(v) Inside caliper\u00a0\r\n\u00a0\r\n\r\n\r\nQ.7 Name the gauges?\r\n\r\n\r\nANS:- (i) Depth gauge\r\n(ii) Filler OR slip gauge\r\n(iii) Radious gauge\r\n(iv) Vernier height gauge\r\n(v) Thread OR pitch gauge\r\n(vi) Wire OR thickness gauge\r\n\u00a0\r\n\r\n\r\nQ.8 What is least count?\r\n\r\n\r\nANS:- Minimum dimension that can be expressed on vernier caliper\r\n\u00a0\r\n\r\n\r\nQ.9 \u00a0What is sheet metal work?\r\n\r\n\r\nANS Sheet metal work is used for making, Cutting and bending\r\n\u00a0\r\n\r\n\r\nQ.10 \u00a0Name the sheet metal hand tools?\r\n\r\n\r\nANS (I) Steel rule\r\n(ii) Vernier caliper\r\n(iii) Micrometer\r\n(iv) Scriber\r\n(v) Divider\r\n(vi) hammer\r\n(viii) mallet\r\n(ix) Shears\r\n\u00a0\r\n\r\n\r\nQ.11 What is the name of vice used in fitting shop?\r\n\r\n\r\nANS: Bench vice\r\n\u00a0\r\n\r\n\r\nQ.12 \u00a0Name the different files?\r\n\r\n\r\nANS: (i) Flat file\r\n(ii) Square file\r\n(iii) Round file\r\n(iv) Triangular file\r\n(v) Half round file\r\n\u00a0\r\n\r\n\r\nQ.13 \u00a0Which tools are used in fitting shop?\r\n\r\n\r\nANS: (i) Steel rule\r\n(ii) Try square\r\n(iii) Vernier caliper\r\n(iv) Scriber\r\n(v) Center punch\r\n(vi) Hammer\r\n(vii) Hacksaw frame with blade\r\n(viii) Rough file and Smooth file\r\n\u00a0\r\n\r\n\r\nQ.14 \u00a0What is the use of center punch?\r\n\r\n\r\nANS: Center punch used in a bench work for marking out work, locating center etc.\r\n\u00a0\r\n\r\n\r\nQ.15 \u00a0How the pipes are specified?\r\n\r\n\r\nAns: (i) Material\r\n(ii) Inside diameter\r\n(iii) Wall thickness\r\n(iv) Length\r\n\u00a0\r\n\r\n\r\nQ.16 \u00a0Name only five fittings?\r\n\r\n\r\nANS: (i) Elbow\r\n(ii) Tee\r\n(iii) Union\r\n(iv) Coupling\r\n(v) Reducer\r\n\u00a0\r\n\r\n\r\nQ.17: Name the common carpentry tools?\r\n\r\n\r\nAnS: (i) Steel rule\r\n(ii) Try square\r\n(iii) Rip saw\r\n(iv) firmer chisel\r\n(v) Jack plane\r\n(vi) Rasp cut file\r\n(vii) Hammer\r\n(viii) Wooden mallet\r\n\u00a0\r\n\r\n\r\nQ.18 Name the carpentry process?\r\n\r\n\r\nANS: (i) Marking\r\n(ii) Sawing\r\n(iii) Planning\r\n(iv) Chieseling\r\n(v) Grooving\r\n\u00a0\r\n\r\n\r\nQ.19 Name the types of welding?\r\n\r\n\r\nANS: (i) Arc welding\r\n(ii) Argon welding\r\n(Iii) Gas welding\r\n(iv) Tig welding\r\n(v) Mig welding\r\n(vi) Spot welding\r\n\u00a0\r\n\r\n\r\nQ.20 Which is the welding process you have carried out in workshop?\r\n\r\n\r\nANS: Electric arc welding\r\n\u00a0\r\n\r\n\r\nQ.21 \u00a0Name the welding tools used in workshop?\r\n\r\n\r\nANS: Welding holder, welding rod, hand screen, hand gloves, chipping hammer, wire brush\r\n\u00a0\r\n\r\n\r\nQ.22 Name the only five parts of lathe machine?\r\n\r\n\r\nANS: (i) Bed\r\n(ii) Tail stock\r\n(iii) Carriage\r\n(iv) Chuck\r\n(v) Tool post\r\n\u00a0\r\n\r\n\r\nQ.23 Name the operation which can be performed by lathe machine?\r\n\r\n\r\nANS: (i) Facing\r\n(ii) Turning\r\n(iii) Chamfring\r\n(iv) grooving\r\n(v) Boring\r\n(vi) Parting\r\n(vii) Threading\r\n\u00a0\r\n\r\n\r\nQ.24 Name the types of furnace?\r\n\r\n\r\nANS: Open fire and Stock fire furnace\r\n\u00a0\r\n\r\n\r\nQ.25 Name the tools used in smithy shop?\r\n\r\n\r\nANS: (i) Anvil\r\n(ii) Swage block\r\n(iii) Sledge hammer\r\n(iv) Flat tongs\r\n\u00a0","headline":"Workshop Technology Viva ,Objective questions For Mechanical Students","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-04-21","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/04\/WorkshopTechnologyViva2CObjectivequestionsForMechanicalStudents-300x184.jpg","height":184,"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 "> <a href="//www.gunkrazy.com/difference-between-up-milling-and-down/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2017/04/differencebetwwenupmillinganddownmilling-300x209.png')"></div><span class="sr-only">link to Difference between Up milling and Down milling</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/difference-between-up-milling-and-down/">Difference between Up milling and Down milling</a></p></header><div class="excerpt"><p>Difference between Up milling and Down milling  Milling is a process of producing flat and complex shapes with the use of multi­point (or multi­tooth) cutting tool. The axis of rotation of the...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/difference-between-up-milling-and-down/" aria-label="View Post: Difference between Up milling and Down milling">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Difference between Up milling and Down milling","url":"\/\/www.gunkrazy.com\/difference-between-up-milling-and-down\/","articleBody":"Difference between Up milling and Down milling\r\n\r\nMilling is a process of producing flat and complex shapes with the use of multi\u00adpoint (or multi\u00adtooth) cutting tool. The axis of rotation of the cutting tool is perpendicular to the direction of feed, either parallel or perpendicular to the machined surface. Milling is usually an interrupted cutting operation since the teeth of the milling cutter enter and exit the workpiece during each revolution. This interrupted cutting action subjects the teeth to a cycle of impact force and thermal shock on every rotation. The tool material and cutter geometry must be designed to withstand these conditions. Figure depicts two basic types of milling operations: down milling, when the cutter rotation is in the same direction as the motion of the workpiece being fed, and up milling, in which the workpiece is moving towards the cutter, opposing the cutter direction of rotation.\r\n\r\nIn down milling, the cutting force is directed on to the work table, which allows thinner parts to be machined without susceptibility to breakage. Better surface finish is obtained in down milling but the stress load on the teeth is abrupt, which may damage the cutter. Backlash eliminator has to be used in this operation. In up milling, the cutting action tends to lift the workpiece and hence, Proper fixture is required in this operation.\r\n\r\n\r\nRead More: Basic Of Milling -Up Milling and Climb Milling\u00a0\r\n\r\n\r\nDifference Between Up Milling and Down Milling\r\n\r\n\r\n&nbsp;\r\nDifference Between Up Milling And Down Milling\r\n\r\n\r\n\r\n\r\n\r\n\r\nUp Milling\r\n\r\nDown Milling\r\n\r\n\r\n\r\n1. There is propensity to lift workpiece so extra clamping forces are required to fix job on table.\r\n\r\nForces are enough on job to press down. Thus clamping difficulty is not so much.\r\n\r\n\r\n\r\n2. Cutter turns against direction in which the work is being fed.\r\n\r\nCutter turns in similar direction as to in which the work is being fed.\r\n\r\n\r\n\r\n3. It use of cutting fluid is complicated.\r\n\r\nIt use of cutting fluid is simple.\r\n\r\n\r\n\r\n4. Cutting force vary as of zero to maximum.\r\n\r\nCutting forces vary as of maximum to zero.\r\n\r\n\r\n\r\n5. Job tool movement is in opposite way.\r\n\r\nJob tool movement is in the similar direction.\r\n\r\n\r\n\r\n6. Chip thickness differs as of minimum to maximum.\r\n\r\nChip thickness differs as of minimum to maximum.\r\n\r\n\r\n\r\n7.It surface finish is improved.\r\n\r\nIt surface finish is improved, if it is free as of backlash error.\r\n\r\n\r\n\r\n8. It is feasible.\r\n\r\nIt is unfeasible.","headline":"Difference between Up milling and Down milling","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-04-20","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/04\/differencebetwwenupmillinganddownmilling-300x209.png","height":209,"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 "> <a href="//www.gunkrazy.com/air-standard-diesel-cycle-used-for/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2017/04/pvtsdiagramfordieselengine-300x162.jpg')"></div><span class="sr-only">link to Air Standard Diesel Cycle- Used For Diesel Engine</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/air-standard-diesel-cycle-used-for/">Air Standard Diesel Cycle- Used For Diesel Engine</a></p></header><div class="excerpt"><p>Which cycle is used in diesel engine? Diesel Engine Cycle -PV And TS Diagrams 
The diesel internal combustion engine differs from the gasoline powered Otto cycle by using a higher compression of...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/air-standard-diesel-cycle-used-for/" aria-label="View Post: Air Standard Diesel Cycle- Used For Diesel Engine">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Air Standard Diesel Cycle- Used For Diesel Engine","url":"\/\/www.gunkrazy.com\/air-standard-diesel-cycle-used-for\/","articleBody":"Which cycle is used in diesel engine? Diesel Engine Cycle -PV And TS Diagrams\u00a0\r\nThe diesel internal combustion engine differs from the gasoline powered Otto cycle by using a higher compression of the fuel to ignite the fuel rather than using a spark plug (\"compression ignition\" rather than \"spark ignition\").\r\n\r\nThe Diesel cycle is a combustion process of a reciprocating internal combustion engine. In it, fuel is ignited by heat generated during the compression of air in the combustion chamber, into which fuel is then injected. This is in contrast to igniting the fuel-air mixture with a spark plug as in the Otto cycle (four-stroke\/petrol) engine. Diesel engines are used in aircraft, automobiles, power generation, diesel-electric locomotives, and both surface ships and submarines.\r\n\r\n\r\nIn the diesel engine, air is compressed adiabatically with a compression ratio typically between 15 and 20. This compression raises the temperature to the ignition temperature of the fuel mixture which is formed by injecting fuel once the air is compressed.\r\n\r\nThe ideal air-standard cycle is modeled as a reversible adiabatic compression followed by a constant pressure combustion process, then an adiabatic expansion as a power stroke and an isovolumetric exhaust. A new air charge is taken in at the end of the exhaust, as indicated by the processes a-e-a on the diagram.\r\n\r\n\r\nPV TS Diagram For Diesel Engines\r\n\r\n\r\nThe Diesel cycle is assumed to have constant pressure during the initial part of the combustion phase. This is an idealized mathematical model: real physical diesels do have an increase in pressure during this period, but it is less pronounced than in the Otto cycle. In contrast, the idealized Otto cycle of a gasoline engine approximates a constant volume process during that phase.\r\n\r\n\r\nProcesses in Diesel Cycle:\r\n\r\nDiesel cycle has four processes. They are:\r\nProcess 1-2: Isentropic (Reversible adiabatic) Compression\r\nProcess 2-3: Constant Pressure (Isobaric) Heat Addition\r\nProcess 3-4: Isentropic Expansion\r\nProcess 4-1: Constant Volume (Isochoric) Heat Rejection\r\n\r\n\r\nProcess 1-2: Isentropic Compression\r\n\r\n&nbsp;\r\n\r\n\r\nIn this process, the piston moves from Bottom Dead Centre (BDC) to Top Dead Centre (TDC) position. Air is compressed isentropically inside the cylinder. Pressure of air increases from p1 to p2, temperature increases from T1 to T2, and volume decreases from V1 to V2. Entropy remains constant (i.e., s1 = s2). Work is done on the system in this process (denoted by Win in the diagrams above).\r\n\r\nProcess 2-3: Constant Pressure Heat Addition\r\nIn this process, heat is added at constant pressure from an external heat source. Volume increases from V2 to V3, temperature increases from T2 to T3 and entropy increases from s2 to s3.\r\n\r\nHeat added in process 2-3 is given by\r\n\r\nQin = mCp(T3 \u2212 T2) kJ\r\n\r\nwhere,\r\n\r\nm \u2192 Mass of air in kg\r\n\r\nCp \u2192 Specific heat at constant pressure in kJ\/kgK\r\n\r\nT2 \u2192 Temperature at point 2 in K\r\n\r\nT3 \u2192 Temperature at point 3 in K\r\n\r\nProcess 3-4: Isentropic Expansion\r\nHere the compressed and heated air is expanded isentropically inside the cylinder. The piston is forced from TDC to BDC in the cylinder. Pressure of air decreases from p3 to p4, temperature decreases from T3 to T4, and volume increases from V3 to V4. Entropy remains constant (i.e., s3 = s4). Work is done by the system in this process (denoted by Wout in the p-V and T-s diagrams above).\r\n\r\nProcess 4-1: Constant Volume Heat Rejection\r\nIn this process, heat is rejected at constant volume (V4 = V1). Pressure decreases from P4 to P1, temperature decreases from T4 to T1 and entropy decreases from s4 to s1.\r\n\r\nHeat rejected in process 4-1 is given by\r\n\r\nMCV QOUT = (T4 - T1) \u00a0 kJ\r\nwhere,\r\n\r\nm \u2192 Mass of air in kg\r\n\r\nCv \u2192 Specific heat at constant volume in kJ\/kgK\r\n\r\nT2 \u2192 Temperature at point 2 in K\r\n\r\nT3 \u2192 Temperature at point 3 in K\r\n\r\n\r\n\r\nThis cycle can operate with a higher compression ratio than the Otto cycle because only air is compressed and there is no risk of auto-ignition of the fuel. Although for a given compression ratio the Otto cycle has higher efficiency, because the Diesel engine can be operated to higher compression ratio, the engine can actually have higher efficiency than an Otto cycle when both are operated at compression ratios that might be achieved in practice.","headline":"Air Standard Diesel Cycle- Used For Diesel Engine","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-04-20","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/04\/pvtsdiagramfordieselengine-300x162.jpg","height":162,"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 "> <a href="//www.gunkrazy.com/types-of-beam-classification-of-bea/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2017/04/typesofbeamcrosssection-300x214.jpg')"></div><span class="sr-only">link to Types Of Beam | Classification Of Beam Used For Construction</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/types-of-beam-classification-of-bea/">Types Of Beam | Classification Of Beam Used For Construction</a></p></header><div class="excerpt"><p>Types Of Beam | Classification Of Beam Used For Construction 
A beam is a structural member used for bearing loads. It is typically used for resisting vertical loads, shear forces and bending...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/types-of-beam-classification-of-bea/" aria-label="View Post: Types Of Beam | Classification Of Beam Used For Construction">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Types Of Beam | Classification Of Beam Used For Construction","url":"\/\/www.gunkrazy.com\/types-of-beam-classification-of-bea\/","articleBody":"Types Of Beam | Classification Of Beam Used For Construction\u00a0\r\nA beam is a structural member used for bearing loads. It is typically used for resisting vertical loads, shear forces and bending moments.\r\nTypes of Beams:\r\nBeams can be classified into many types based on three main criteria. They are as follows:\r\n\r\n1. Based on equilibrium conditions:\r\n\r\nStatically determinate beam \u2013 For a statically determinate beam, equilibrium conditions alone can be used to solve reactions.\r\nStatically indeterminate beam \u2013 For a statically indeterminate beam, equilibrium conditions are not enough to solve reactions. Additional deflections are needed to solve reactions.\r\n\r\n\r\n2. Based on the shape of cross section:\r\n\r\n\r\n\r\n \tI-beam \u2013 Beam with \u2018I\u2019 cross section\r\n \tT-beam \u2013 Beam with \u2018T\u2019 cross section\r\n \tC-beam \u2013 Beam with \u2018C\u2019 cross section\r\n\r\n&nbsp;\r\n\r\nBeam Cross Sections\r\n\r\n\u00a03. Based on geometry:\r\n\r\n\r\nStraight beam \u2013 Beam with straight profile\r\nCurved beam \u2013 Beam with curved profile\r\nTapered beam \u2013 Beam with tapered cross section\r\n\r\n\r\n4. Based on the type of support:\r\n\r\n\r\nTypes Of Beams\r\n\r\n1. Simply supported beam:\r\nA simply supported beam is a type of beam that has pinned support at one end and roller support at the other end. Depending on the load applied, it undergoes shearing and bending. It is the one of the simplest structural elements in existence.\r\n\r\n2. Cantilever beam:\r\n\r\nA cantilever beam is fixed at one end and free at other end. It can be seen in the image below.\r\n\r\n3. Overhanging beam:\r\nA overhanging beam is a beam that has one or both end portions extending beyond its supports. It may have any number of supports. If viewed in a different perspective, it appears as if it is has the features of simply supported beam and cantilever beam.\r\n\r\n4. Continuous beam:\r\nA continuous beam has more than two supports distributed throughout its length. It can be understood well from the image below.\r\n\r\n5. Fixed beam:\r\nAs the name suggests, fixed beam is a type of beam whose both ends are fixed\r\n\r\n6.Trussed - a beam strengthened by adding a cable or rod to form a truss.","headline":"Types Of Beam | Classification Of Beam Used For Construction","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2017-04-18","mainEntityOfPage":"False","dateModified":"February 23, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2017\/04\/typesofbeamcrosssection-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=243">&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=242"><span class="screen-reader-text">Page </span>242</a> <a class="page-numbers" href="?page_num=243"><span class="screen-reader-text">Page </span>243</a> <span aria-current="page" class="page-numbers current"><span class="screen-reader-text">Page </span>244</span> <a class="page-numbers" href="?page_num=245"><span class="screen-reader-text">Page </span>245</a> <a class="page-numbers" href="?page_num=246"><span class="screen-reader-text">Page </span>246</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=245">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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