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Gear Basic | Theory of machine Interview , viva ,oral  Question and Answers  Read More : Gear Cutting - Gear Manufacturing |...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/gear-basic-theory-of-machine-interview-question-and-answers/" aria-label="View Post: Gear Basic | Theory of machine Interview Question and Answers">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Gear Basic | Theory of machine Interview Question and Answers","url":"\/\/www.gunkrazy.com\/gear-basic-theory-of-machine-interview-question-and-answers\/","articleBody":"Gear Basic | Theory of machine Interview Question and Answers\r\nGear Basic | Theory of machine Interview , viva ,oral\u00a0 Question and Answers\r\n\r\nRead More :\u00a0Gear Cutting - Gear Manufacturing | Interview Question and Answers\r\n\r\n1. State law of Gearing.\r\n\r\nThe law of gearing states that for obtaining a constant velocity ratio, at any instant of teeth the common normal at each point of contact should always pass through a pitch point, situated on the line joining the centre of rotation of the pair of mating gears.\r\n\r\n2. Define normal and axial pitch in helical gears.\r\n\r\n \tNormal pitch is the distance between similar face of adjacent teeth, along a helix on the pitch cylinder normal to the teeth.\r\n \tAxial pitch is the distance measured parallel to the axis between similar faces of a adjacent teeth.\r\n\r\n3. What is the maximum efficiency in worm and worm gear?\r\n\r\n\u03aemax = 1-sin\u03c6\/1+sin\u03c6\r\n\r\n4. What are the advantages and limitations of gear drive? Write any two.\r\n\r\nAdvantages:\r\n1. Since there is no slip, so exact velocity ratio is obtained.\r\n2. It is more efficient and effective means of power transmission.\r\n\r\nLimitations:\r\n1. Manufacture of gear is complicated.\r\n2. The error in cutting teeth may cause vibration and noise during operation.\r\n\r\nRead more :\u00a0Mechanical Drives- Belt, Chain, Gear | Advantages and Disadvantages\r\n\r\n5. Define interference.\r\n\r\nThe phenomenon when the tip of tooth undercuts the roots on its mating gear is known as interference.\r\n\r\n6. Define cycloidal tooth profile and involute tooth profile.\r\n\r\nA cycloid is the curve traced by a point on the circumference of a circle which rolls without slipping on a fixed straight line.\r\nInvolute profile is defined as the locus of a point on a straight line which rolls without slipping on the circumference of a circle.\r\n\r\n7. Define circular pitch and diametral pitch in spur gears.\r\n\r\nCircular pitch (pc) : It is the distance measured along the circumference of the pitch circle from a point on one teeth to the corresponding point on the adjacent tooth.\r\n\r\npc=\u03c0D\/T\r\n\r\nDiametral pitch (pD) : It is the ratio of number of teeth to the pitch circle diameter.\r\n\r\nPD=T\/D=\u03c0\/pc\r\n\r\n8. Define Backslash.\r\n\r\nIt is the difference between the tooth space and the tooth thickness along the pitch circle.\r\nBackslash = Tooth space \u2013 Tooth thickness\r\n\r\n9. What is gear train of train of wheels?\r\n\r\nTwo or more gears re made to mesh with each other to transmit power from one shaft to another. Such a combination is called a gear train or train of wheels.\r\n\r\n10. Write velocity ratio in compound train of wheels?\r\n\r\nSpeed of last follower - Product of teeth on drivers\r\nSpeed of first driver \u2013 Product of teeth on followers.\r\n\r\n11. Define simple gear train.\r\n\r\nWhen there is only one gear on each shaft, it is known as simple gear train.\r\n\r\nRead More :\u00a0Gearbox Design | Machine Design- Interview Question and Answers\r\n\r\n12. What is reverted gear train?\r\n\r\nWhen the axes of the first and last wheels are co-axial, the train is known as reverted gear train.\r\n\r\n13. Where the epicyclic gear trains are used?\r\n\r\nThe epicyclic gear trains are used in the back gear of lathe, differential gears of the automobiles, pulley blocks, wrist watches, etc\r\n\r\n14. Define conjugate action.\r\n\r\nWhen the tooth profiles are so shaped so as to produce a constant angular velocity ratio during Meshing, then the surface are said to de conjugate.\r\n\r\n15. Define Contact Ratio.\r\n\r\nIt is the ratio of the length of arc contact to the circular pitch is known as contact ratio. The value gives the number of pairs of teeth in contact.\r\n\r\n16. What is an angle of obliquity in gears?\r\n\r\nIt is the angle between the common normal to two gear teeth at the point of contact and the common tangent at the pitch point. It is called as pressure angle.\r\n\r\n17. What is bevel gearing? Mention its types.\r\n\r\nWhen the non-parallel (or) intersecting but coplanar shafts connected by gears, they are called bevel gears and the arrangement is bevel gearing. It is of two types namely skew bevel gearing and spiral gearing.\r\n\r\nbevel-gear\r\n\r\n18. What are the methods to avoid interference?\r\n\r\n1. The height of the teeth may be reduced.\r\n2. The pressure angle may be increased.\r\n3. The radial flank of the pinion may be cut back (undercutting).\r\n\r\n19. What is the advantage when arc of recess is equal to arc of approach in meshing gears? \r\n\r\nWhen arc of recess equal to arc of approach, the work wasted by friction is minimum and efficiency of drive is maximum.\r\n\r\n20. What do you know about tumbler gear?\r\n\r\nTumbler gears are those which are used in lathes for reversing the direction of rotation of driven gears.\r\n\r\n21. What you meant by non-standard gear teeth?\r\n\r\nThe gear tooth obtained by modifying the standard proportions of gear teeth parameters is known as non- standard gear teeth.\r\n\r\n22. What is meant by compound gear train?\r\n\r\nWhen there are more than one gear on shaft, it is called a compound gear train.\r\n\r\n23. What is the advantage of a compound gear train over a simple gear train?\r\n\r\nThe advantage of a compound gear train over a simple gear train is that a much larger speed reduction from the first shaft to the last shaft can be obtained with small gears.\r\n\r\n24. State the methods to find the velocity ratio of epicyclic gear train.\r\n\r\nTwo methods are:\r\n1) Tabulation method.\r\n2) Algebraic method.\r\n\r\nRead More :\u00a0Epicyclic Gearbox -Diagram , Working , Advantages of Epicyclic gearbox\r\n\r\n25. What is the externally applied torques used to keep the gear train in equilibrium?\r\n\r\n1) Impart torque on the driving member.\r\n2) Resisting or holding torque on the driven member.\r\n3) Holding or braking torque on the fixed member.\r\n\r\n\r\n\r\nMore Resources \/articles\r\nTechnical Mechanical Interview Question and Answers\r\nTheory of Machine Article , Notes , Question and Answer\r\nLatest seminar topic index - Report ,PPT Download\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\nNew Mechanical Projects 2020 ( All Projects Post Index List )\r\n\r\n\r\n\r\n&nbsp;","headline":"Gear Basic | Theory of machine Interview Question and Answers","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-05-11","mainEntityOfPage":"False","dateModified":"February 19, 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 no-thumb"><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/cam-and-follower-interview-question-and-answers/">Cam and Follower | Interview Question and Answers</a></p></header><div class="excerpt"><p>Cam and Follower | Interview Question and Answers
Cam and Follower | Interview , viva , oral Question and Answers  Read More :
Cam and Follower | Definition , types , Nomenclature Of Cam
Advance...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/cam-and-follower-interview-question-and-answers/" aria-label="View Post: Cam and Follower | Interview Question and Answers">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Cam and Follower | Interview Question and Answers","url":"\/\/www.gunkrazy.com\/cam-and-follower-interview-question-and-answers\/","articleBody":"Cam and Follower | Interview Question and Answers\r\nCam and Follower | Interview , viva , oral Question and Answers\r\n\r\nRead More :\r\nCam and Follower | Definition , types , Nomenclature Of Cam\r\nAdvance Cam Operated Hammer- Mechanical Project\r\nTypes Of Cam And Followers-Basic Of Theory Of machine\r\n\r\n1. What is cam?\r\n\r\nA cam is a rotating machine element which gives reciprocating (or) oscillating motion to another element known as follower\r\n\r\n2. Define tangent cam?\r\n\r\nWhen the flanks of the cam are straight and tangential to the base circle and nose circle, the cam is known as tangent cam.\r\n\r\n3. What is the classification of followers?\r\n\r\n(i) According to follower shape\r\n(ii) According to motion of follower \r\n\r\n4. What are the different motions of the follower?\r\n\r\n(i) Uniform motion,\r\n(ii) Simple harmonic motion,\r\n(iii) Uniform acceleration and retardation, and\r\n(iv) Cycloidal motion.\r\n\r\n5. What is a roller follower? What is a Spherical follower?\r\n\r\nIn place of a knife edge roller is provided at the contacting end of the follower\u00a0\r\nIn the contacting end of the follower is of spherical shape.\r\n\r\n6. Explain offset follower.\r\n\r\nWhen the motion of the follower is along an axis away from the axis of the cam centre, it is called offset follower. \r\n\r\n7. Define trace point in the study of cams.\r\n\r\nIt is a reference point on the follower and is used to generate the pitch curve. In case of knife edge follower the knife edge represents the trace point and the pitch curve corresponds to the cam profile. In a roller follower the centre of the roller represents the trace point.\r\n\r\n8. Define pressure angle with respect to cams.\r\n\r\nIt is the angle between the direction of the follower motion and a normal to the pitch curve. This angle is very important in designing a cam profile. If the pressure angle is too large, a reciprocating follower will jam in its bearings.\r\n\r\n9. Define Lift (or) Stroke in cam.\r\n\r\nIt is the maximum travel of the follower from its lowest position to the topmost position.\r\n\r\n10. Define undercutting in cam. How is occurs?\r\n\r\nThe cam profile must be continuous curve without any loop. If the curvature of the pitch curve is too sharp, then the part of the cam shape would be lost and thereafter the intended cam motion would not be achieved. Such a cam is said to be undercut. Undercutting occurs in the cam because of attempting to achieve too great a follower lift with very small cam rotation with a smaller cam.\r\n\r\n11. What do you know about Nomogram?\r\n\r\nIn Nomogram, by knowing the values of total lift of the follower (L) and the cam rotation angle (\u03b2) for each segment of the displacement diagram, we can read directly the maximum pressure angle occurring n the segment for a particular choice of prime circle radius (R0).\r\n\r\n12.What are the classifications of cam based on the follower movement?\r\n\r\n1) Rise-Return-Rise (R-R-R) cams,\r\n2) Dwell-Rise-Return-Dwell (D-R-R-D) cams,\r\n3) Dwell-Rise-Dwell-Return-Dwell (D-R-D-R-D) cams,\r\n4) Dwell-Rise-Dwell (D-R-D) cams. \r\n\r\n13. What are the different types of cams?\r\n\r\n1. Wedge (or) flat cams\r\n2. Radial (or) Disc cams\r\n3. Spiral cams\r\n4. Cylindrical (or) Barrel (or) Drum Cams\r\n5. Conjugate cams\r\n6. Globoidal cams\r\n7. Spherical cams\r\n\r\nTypes Of Cams\r\n\r\n14.What do you know about gravity cam?\r\n\r\nIn this type, the rise of the cam is achieved by the rising surface of the cam and the return by the force of gravity of die to the weight of the cam.\r\n\r\n15. Define Trace point.\r\n\r\nIt is a reference point on the follower to trace the cam profile. In case of a knife edge follower, the knife edge itself is a tracing point and in roller follower, the centre of the roller is the tracing point.\r\n\r\n16. Define pressure angle.\r\n\r\nIt is the angle between the direction of the follower motion and a normal to the pitch curve. This is very important in cam design as it represents steepness of the cam profile. If the pressure angle is too large, a reciprocating follower will jam in its bearings.\r\n\r\n17. Define Prime circle.\r\n\r\nThe smallest circle drawn tangent to the pitch curve is known as the prime circle.\r\n\r\n18. Define Angle of Ascent.\r\n\r\nThe angle of rotation of cam from the position when the follower begins to rise till it reaches its highest position is known as angle of ascent. It is also known as out stroke and is denoted by \u03b80.\r\n\r\n19. What is meant by Simple Hormonic Motion?\r\n\r\nWhen a body rotates on a circular path with uniform angular velocity, its projection on the diameter will have simple harmonic motion. The velocity of the projection will be maximum at the centre of and zero at the ends of the diameter. In case of acceleration and retardation, the values will be zero at the centre and maximum at the ends of diameter.\r\n\r\n20. What are the different shapes of high speed cams?\r\n\r\n1. Circular Arc cam with flat faced follower\r\n2. Tangent cam with reciprocating roller follower\r\n\r\n21. Define cam angle.\r\n\r\nIt is the angle of rotation of the cam for a definite displacement of the follower.\r\n\r\n22. What are the classifications of follower based on the follower movement?\r\n\r\ni) Reciprocating (or) translating follower.\r\nii) Oscillating (or) rotating follower.\r\n\r\n23. Define Pitch curve.\r\n\r\nThe locus of the tracing point is known as the pitch curve. For the purpose of laying out the cam profiles, it is assumed that the cam is fixed and the follower rotates around it.\r\n\r\n24. What are the classifications of the follower based on the path of motion of the follower?\r\n\r\na) Radial follower.\r\nb) Offset follower.\r\n\r\n25. What are the classifications of cam base on the constraint of the follower?\r\n\r\na) Pre-loaded spring cams.\r\nb) Positive drive cams.\r\nc) Gravity cams.\r\n\r\n\r\n\r\nMore Resources \/articles\r\nTechnical Mechanical Interview Question and Answers\r\nTheory of Machine Article , Notes , Question and Answer\r\nLatest seminar topic index - Report ,PPT Download\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\nNew Mechanical Projects 2020 ( All Projects Post Index List )\r\n\r\n\r\n\r\n&nbsp;","headline":"Cam and Follower | Interview Question and Answers","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-05-10","mainEntityOfPage":"False","dateModified":"February 19, 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/kinematic-analysis-tom-interview-question-and-answers/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2019/05/coriolis-component-of-acceleration-298x300.jpg')"></div><span class="sr-only">link to Kinematic Analysis | TOM Interview Question and Answers</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/kinematic-analysis-tom-interview-question-and-answers/">Kinematic Analysis | TOM Interview Question and Answers</a></p></header><div class="excerpt"><p>Kinematic Analysis | TOM Interview Question and Answers
Kinematic Analysis | TOM Interview, viva ,oral Question and Answers  1. What are the components of acceleration?  Radial component of...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/kinematic-analysis-tom-interview-question-and-answers/" aria-label="View Post: Kinematic Analysis | TOM Interview Question and Answers">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Kinematic Analysis | TOM Interview Question and Answers","url":"\/\/www.gunkrazy.com\/kinematic-analysis-tom-interview-question-and-answers\/","articleBody":"Kinematic Analysis | TOM Interview Question and Answers\r\nKinematic Analysis | TOM Interview, viva ,oral Question and Answers\r\n\r\n1. What are the components of acceleration?\r\n\r\n \tRadial component of acceleration\r\n \tTangential component of acceleration\r\n\r\n2. Write an expression for find number of instantaneous centers in a mechanism.\r\n\r\nN=n(n-1)\/2, n-no of links\r\n\r\n3. What is expression for Coriolis componenet of acceleration?\r\n\r\na BC =2r\u03c9\r\nWhere \u03c9=Angular velocity of \u2018OA\u2019\r\nV=Linear velocity of \u2018B\u2019\r\n\r\ncoriolis component of acceleration\r\n\r\n4. How can we represent the direction of linear velocity of any point on a link with respect to another point on the same link?\r\n\r\nThe direction of linear velocity of any point on a link with respect to another point on the same link the direction is perpendicular to the line joining the points.\r\n\r\n5. What are the important concepts in velocity analysis?\r\n\r\n1. The absolute velocity of any point on a mechanism is the velocity of that point with reference to ground.\r\n2. Relative velocity describes how one point on a mechanism moves relative to another point on the mechanism.\r\n\r\n6. Define Instantaneous centre.\r\n\r\nInstantaneous centre of a moving body may be defined as that centre which goes on changing from one instant to another.\r\n\r\n7. Define Instantaneous centre\r\n\r\nInstantaneous axis is a line drawn through an instantaneous centre and perpendicular to the plane of motion.\r\n\r\n8. How to represent the direction of linear velocity of any point on a link with respect to another point on the same link?\r\n\r\nThe direction of linear velocity of any point on a link with respect to another point on the same link is perpendicular to the line joining the points.\r\n\r\n9. Define Kennedy\u2019s theorem.\r\n\r\nThe Kennedy\u2019s theorem states that if three bodies move relatively to each other, they have three instantaneous centers and lie on a straight line.\r\n\r\n10. Define displacement.\r\n\r\nIt may be defined as the distance moved by a body with respect to a fixed certain fixed point. When there is no displacement in a body it is said to be at rest and when it is being displaced, it is said to be in motion.\r\n\r\n11. What are the types of motions?\r\n\r\n1. Rectilinear motion.\r\n2. Curvilinear motion.\r\n3. Circular motion.\r\n\r\n12. What are the methods for determining the velocity of a body?\r\n\r\nImportant methods for determining the velocity of a body are:\r\n1. Graphical method: i) Relative velocity method\r\nii) Instantaneous centre method\r\n2. Analytical method.\r\n\r\n13. Define velocity.\r\n\r\nVelocity may be defined as the rate of change of displacement of a body with respect to the time. Since the velocity has both magnitude and direction, therefore it is a vector quantity.\r\n\r\n14. Define speed.\r\n\r\nSpeed may be defined as the rate of change of linear displacement of a body with respect to the time. Since the speed is irrespective of its direction, therefore it is a scalar quantity.\r\n\r\n15. What is deceleration?\r\n\r\nThe negative acceleration is also known as deceleration or retardation.\r\n\r\n16. Define Acceleration.\r\n\r\nThe rate of change of velocity with respect to time is known as acceleration.\r\n\r\n17. Define coincident points.\r\n\r\nWhen a point on one link is sliding along another rotating link, then the point is known as coincident point.\r\n\r\n18. Define centrode.\r\n\r\nThe locus of all instantaneous centre\u2019s (i.e., I1, I2,\u2026) is known as centrode.\r\n\r\n19. Define Axode.\r\n\r\nThe locus of all instantaneous axis is known as axode.\r\n\r\n20. Define Body centrode.\r\n\r\nThe locus of all instantaneous centre relative to the body itself is called the body centrode.\r\n\r\n\r\n\r\nMore Resources \/articles\r\nTechnical Mechanical Interview Question and Answers\r\nTheory of Machine Article , Notes , Question and Answer\r\nLatest seminar topic index - Report ,PPT Download\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\nNew Mechanical Projects 2020 ( All Projects Post Index List )\r\n\r\n\r\n\r\n&nbsp;","headline":"Kinematic Analysis | TOM Interview Question and Answers","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-05-10","mainEntityOfPage":"False","dateModified":"February 19, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2019\/05\/coriolis-component-of-acceleration-298x300.jpg","height":300,"width":298},"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/mechanism-basic-tom-interview-question-and-answers/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2019/05/turning_pair-300x169.jpg')"></div><span class="sr-only">link to Mechanism Basic | TOM Interview Question and Answers</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/mechanism-basic-tom-interview-question-and-answers/">Mechanism Basic | TOM Interview Question and Answers</a></p></header><div class="excerpt"><p>Mechanism Basic | TOM Interview Question and Answers
Machine and Mechanism Basic | TOM Interview, viva ,oral Question and Answers  1. Define Kinematic link.  It is a resistive body which go to...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/mechanism-basic-tom-interview-question-and-answers/" aria-label="View Post: Mechanism Basic | TOM Interview Question and Answers">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Mechanism Basic | TOM Interview Question and Answers","url":"\/\/www.gunkrazy.com\/mechanism-basic-tom-interview-question-and-answers\/","articleBody":"Mechanism Basic | TOM Interview Question and Answers\r\nMachine and Mechanism Basic | TOM Interview, viva ,oral Question and Answers\r\n\r\n1. Define Kinematic link.\r\n\r\nIt is a resistive body which go to make a part of a machine having relative motion between them.\r\n\r\n2. Define Kinematic pair.\r\n\r\nWhen two links are in contact with each other it is known as a pair. If the pair makes constrain motion it is known as kinematic pair.\r\n\r\n3. Define Kinematic chain.\r\n\r\nWhen a number of links connected in space make relative motion of any point on a link with respect to any other point on the other link follow a definite law it is known as kinematic chain.\r\n\r\n4. Write the Grubler\u2019s criterion for determining the degrees of freedom of a mechanism having plane motion.\r\n\r\nn=3(l-1)-2j\r\nh-Higher pair joint\r\nl-Number of links\r\nj-Lower pair joint\r\n\r\nRead more :\u00a0How to calculate degree of freedom of a mechanism | Grublers Rules\r\n\r\n5. Define degree of freedom, what is meant by mobility.\r\n\r\nThe mobility of a mechanism is defined as the number of input parameters which must be independently controlled in order to bring the device into a particular position.\r\n\r\n6. Write the Kutzbach\u2019s relation.\r\n\r\nKutzbach\u2019s criterion for determining the number of degrees of freedom or movability (n) of a plane mechanism is n=3(l-1)-2j-h\r\nn-Degree of freedom.\r\nl-Number of links.\r\nh-Higher pair joint\r\nj-Lower pair joint.\r\n\r\n7. Define Grashoff\u2019s law and state its significance.\r\n\r\nIt states that in a planar four bar mechanism, the sum of shortest link length and longest link length is not greater than the sum of remaining two links length, if there is to be continuous relative motion between two members.\r\n\r\nSignificance:\r\nGrashoff\u2019s law specifies the order in which the links are connected in a kinematic chain. Grashoff\u2019s law specifies which link of the four-bar chain is fixed.(s+1)=(p+q) should be satisfied, if not, no link will make a complete revolution relative to another.\r\ns= length of the shorter length\r\nl= length of the longest link\r\np &amp; q are the lengths of the other two links.\r\n\r\n8. Define Inversion of mechanism.\r\n\r\nThe method of obtaining different mechanism by fixing different links in a kinematic chain is known as inversion of mechanism.\r\n\r\nRead more :\u00a0Inversions Of Single slider Crack mechanism-Rotary, Pendulum, Quick return Mechanism\r\n\r\n9. What is meant by Mechanical advantage of mechanism?\r\n\r\nIt is defined as the ratio of output torque to the input torque also defined as the ratio of load to effort.\r\nM.A ideal = TB \/ TA\r\nTB =driven (resisting torque)\r\nTA =driving torque\r\n\r\n10. Define Transmission angle.\r\n\r\nThe acute angle between follower and coupler is known as transmission angle.\r\n\r\n11. Define Toggle position.\r\n\r\nIf the driver and coupler lie in the same straight line at this point mechanical advantage is maximum. Under this condition the mechanism is known as toggle position.\r\n\r\n12. List out few types of rocking mechanism.\r\n\r\nPendulum motion is called rocking mechanism.\r\n1. Quick return motion mechanism.\r\n2. Crank and rocker mechanism.\r\n3. Cam and follower mechanism.\r\n\r\n13. Define pantograph.\r\n\r\nIt is device which is used to reproduce a displacement exactly in a enlarged scale. It is used in drawing offices, for duplicating the drawing maps, plans, etc. It works on the principle of 4 bar chain mechanism.\r\n\r\nEg. Oscillating-Oscillating converter mechanism\r\n\r\n14. Name the application of crank and slotted lever quick return motion mechanism.\r\n\r\n1. Shaping machines.\r\n2. Slotting mechanism.\r\n3. Rotary internal combustion engine.\r\n\r\n15. Define structure.\r\n\r\nIt is an assemblage of a number of resistant bodies having no relative motion between\r\nthem and meant for carrying loads having straining action.\r\n\r\n16. What is simple mechanism?\r\n\r\nA mechanism with four links is known as simple mechanism.\r\n\r\n17. Define mechanism.\r\n\r\nWhen one of the links of a kinematic chain is fixed, the chain is known as a mechanism.\r\n\r\n18. Define equivalent mechanism; and spatial mechanism.\r\n\r\nEquivalent mechanism: The mechanism, that obtained has the same number of the degree of freedom, as the original mechanism called equivalent mechanism. \r\n\r\nSpatial mechanism: Spatial mechanism have special geometric characteristics in that all revolute axes are parallel and perpendicular to the plane of motion and all prism axes lie in the plane of motion.\r\n\r\n19. Define double slider crank chain mechanism.\r\n\r\nA kinematic chain which consists of two turning pair and two sliding pair is known as double slider crank mechanism.\r\n\r\nRead more :\u00a0Scotch Yoke Mechanism- Animation , Advantages and Application\r\n\r\n20. Define single slider crank chain mechanism.\r\n\r\nA single slider crank chain is a modification of the basic four bar chain. It consists of one sliding pair and three turning pair.\r\n\r\nApplications: \r\n\r\n \tRotary or Gnome engines Crank and slotted lever mechanism\r\n \tOscillating cylinder engine Ball engine\r\n \tHand pump\r\n\r\n21. Define Sliding pair.\r\n\r\nIn a sliding pair minimum number of degree of freedom is only one.\r\n\r\n22. Define Turning pair.\r\n\r\nIn a turning pair also degree of freedom is one. When two links are connected such that one link revolves around another link it forms a turning pair.\r\n\r\nturning pair\r\n\r\n23. Define cylindrical pair.\r\n\r\nIn a cylindrical pair degree of freedom is two. If one link turns and slides along another link it forms a cylindrical pair.\r\n\r\n24. Define Rolling pair.\r\n\r\nIn a rolling pair degree of freedom is two. The object moves both linearly and angularly.\r\n\r\n25. Define Spherical pair.\r\n\r\nIn a spherical pair degree of freedom is three. It can both move left and right,up and down, and rotate along the same point.\r\n\r\n26. Define Lower pair.\r\n\r\nIf contact between two links is surface contact also having degree of freedom one, then the pair is known as lower pair.\r\nExample: Sliding pair.\r\n\r\n27. Define higher pair.\r\n\r\nIf contact between two links is either point contact or line contact then the pair is known as higher pair.\r\nExample: Point contact-Rolling pair.\r\nLine contact-Cylindrical pair.\r\n\r\n28. Define Mechanical pair.\r\n\r\n(a) Open pair.\r\nIn this pair everything is open to the atmosphere.\r\n(b) Closed pair.\r\nIn this pair everything is closed from the atmosphere\r\n\r\n29. Give any two example of Snap action mechanism.\r\n\r\nIt is used in calling bells, bicycle bells etc.\r\n\r\n30. What is meant by motion adjustment mechanism?\r\n\r\nThe mechanism used to adjust or modify any one of the links in a mechanism is known as motion adjustment mechanism. Differential screw used in bench vice, pipe wrench, Lathe chuck and screw jack are some of the examples of motion adjustment mechanism.\r\n\r\n31. What is meant by Scott Russel mechanism?\r\n\r\nThis is one of the mechanisms to produce straight line motion mechanism. The mechanism in which the straight line is copied from a existing straight line constrain is known as Scott Russel mechanism.\r\n\r\n32. What are the types of quick return motion mechanism?\r\n\r\nQuick return motion mechanisms are of two types. They are,\r\n1) Crank and slotted lever quick return motion mechanism.\r\n2) Whitworth quick return motion mechanism\r\n\r\n33. What are the different types of joints?\r\n\r\na. Binary Joint b. Ternary Joint c. Quaternary Joint\r\n\r\n34. Classify the Constrained motion?\r\n\r\nConstrained motions are classified into three types\r\n1. Completely constrained motion.\r\n2. Incompletely constrained motion.\r\n3. Successfully constrained motion.\r\n\r\n35. What are the important applications of a single slider crank mechanism?\r\n\r\n1. Rotary or Gnome engine.\r\n2. Crank and slotted lever mechanism.\r\n3. Oscillating cylinder engine.\r\n4. Bull engine and\r\n5. Hand pump.\r\n\r\n36. What is meant by transmission angle?\r\n\r\nIn a four bar chain mechanism, the angle between the coupler and the follower (driven) link is called as the transmission angle.\r\n\r\n37. What are the applications of inversion of double slider crank chain mechanism?\r\n\r\nIt consists of two sliding pairs and two turning pairs. There are three important inversions of double slider crank chain. 1) Elliptical trammel. 2) Scotch yoke mechanism. 3) Oldham\u2019s coupling. Give some examples for kinematic pairs.\r\n\r\n\r\n\r\nMore Resources \/articles\r\nTechnical Mechanical Interview Question and Answers\r\nTheory of Machine Article , Notes , Question and Answer\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\nNew Mechanical Projects 2020 ( All Projects Post Index List )\r\n\r\n\r\n\r\n&nbsp;","headline":"Mechanism Basic | TOM Interview Question and Answers","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-05-10","mainEntityOfPage":"False","dateModified":"February 19, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2019\/05\/turning_pair-300x169.jpg","height":169,"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/mould-design-interview-question-and-answers/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2019/05/injection-moulding-dies-componenets-300x169.jpg')"></div><span class="sr-only">link to Mould Design | Interview Question and Answers</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/mould-design-interview-question-and-answers/">Mould Design | Interview Question and Answers</a></p></header><div class="excerpt"><p>Mould Design | Interview Question and Answers
Mould Design | Interview , viva , oral  Question and Answers  1. What is plastic processing?  Plastic Processing is one of the fastest growing...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/mould-design-interview-question-and-answers/" aria-label="View Post: Mould Design | Interview Question and Answers">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Mould Design | Interview Question and Answers","url":"\/\/www.gunkrazy.com\/mould-design-interview-question-and-answers\/","articleBody":"Mould Design | Interview Question and Answers\r\nMould Design | Interview , viva , oral\u00a0 Question and Answers\r\n\r\n1. What is plastic processing?\r\n\r\nPlastic Processing is one of the fastest growing segments of manufacturing plastic processing is a form conversion process\r\n\r\n2. Define injection moulding.\r\n\r\nInjection molding is a process of producing parts form thermoplastics and thermo plastics.\r\n\r\n3. State the two units of a ram type of injection moulding process\r\n\r\nInjection Unit\r\nClamping Unit\r\n\r\n4. What is the use of rotational moulding?\r\n\r\nThe rotational moulding process is used to make thin walled hollow parts.\r\n\r\n5. Define cycle time\r\n\r\nThe time interval covering the mould cycle is known as cycle time.\r\n\r\n6. What is the press tonnage of compression moulding?\r\n\r\nThe press tonnage requirement may range from 100-500 tones.\r\n\r\n7. What is called positive mould?\r\n\r\nWhen the plastic is completely trapped between the male and female dies, it is called as positive mould\r\n\r\n8. What are the main advantages of thermoforming?\r\n\r\nThe main advantage of this process is low cost and quick process of making the sheet. \r\n\r\n9. Classify extrusion die.\r\n\r\n \tDie for solid section\r\n \tDie for hollow section\r\n\r\n10. State common impregnation liquids\r\n\r\n \tEpoxy\r\n \tPolyurethane\r\n\r\n11. What are the elements considered for the construction of an injection mould?\r\n\r\n \tFixed half and moving half\r\n \tCavity\r\n \tCore\r\n \tImpression\r\n \tSpur bush\r\n \tRunner\r\n \tGate systems\r\n \tGuide pillars and bushes\r\n\r\ninjection moulding dies components\r\n\r\n12. Mention the function of runner.\r\n\r\nRunner is the primary channel carrying the plastic melt from spur to the gate systems in multiple cavities in a mould\r\n\r\n13. What do gate systems do?\r\n\r\nGate is the secondary channel carrying plastic melt from runner to the mould cavity.\r\n\r\n14. Classify cavity and core\r\n\r\n1. Integer cavity and core plates\r\n2. Cavity and core inserts \r\n\r\n15. What are the types of cavity and core inserts?\r\n\r\n1. Rectangular insets blocks\r\n2. Circular insets blocks\r\n\r\n16. List down the types of layouts followed in multiple impression moulds.\r\n\r\n1. Multiple impression mould with circular layout.\r\n2. Multiple impression mould with rectangular layout.\r\n\r\n17. What is a bolster?\r\n\r\nBolster is the steel plate on which the cavity or core inserts are mounted. It is normally made up of mild steel.\r\n\r\n18. Mention the types of bolsters.\r\n\r\n1. Solid bolster\r\n2. Strip type bolster\r\n3. Frame type bolster\r\n4. Chase type bolster\r\n\r\n19. What is gate in injection moulding?\r\n\r\nGate is the channel or orifice connecting the runner with the impression\r\n\r\n20. List down the advantages of ejector pin.\r\n\r\n1. Service life is more.\r\n2. It is easy to repair\r\n\r\n\r\n\r\nMore Resources \/articles\r\nTechnical Mechanical Interview Question and Answers\r\nMachine Tool Articles , notes , Interview Que &amp; Ans\r\nManufacturing Technology Notes , Articles\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\nLatest seminar topic index - Report ,PPT Download\r\n\r\n\r\n\r\n&nbsp;","headline":"Mould Design | Interview Question and Answers","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-05-10","mainEntityOfPage":"False","dateModified":"February 19, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2019\/05\/injection-moulding-dies-componenets-300x169.jpg","height":169,"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/bending-and-forming-interview-question-and-answers/" rel="nofollow"><div class="image-container" style="background-image: url('//www.gunkrazy.com/wp-content/uploads/2019/05/bending-angle-300x220.jpg')"></div><span class="sr-only">link to Bending and Forming | Interview Question and Answers</span></a><div class="copy-container"><header><p><a style="color: #ff392e!important" href="//www.gunkrazy.com/bending-and-forming-interview-question-and-answers/">Bending and Forming | Interview Question and Answers</a></p></header><div class="excerpt"><p>Bending and Forming | Interview Question and Answers
Bending and Forming | Interview, viva , oral  Question and Answers  1. Define neutral axis?  The axis which separates the portions of...</p><div class="button-container"><a rel="nofollow" class="button reverse" href="//www.gunkrazy.com/bending-and-forming-interview-question-and-answers/" aria-label="View Post: Bending and Forming | Interview Question and Answers">View Post</a></div></div></div></article> <script type="application/ld+json">{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","name":"Bending and Forming | Interview Question and Answers","url":"\/\/www.gunkrazy.com\/bending-and-forming-interview-question-and-answers\/","articleBody":"Bending and Forming | Interview Question and Answers\r\nBending and Forming | Interview, viva , oral\u00a0 Question and Answers\r\n\r\n1. Define neutral axis?\r\n\r\nThe axis which separates the portions of tension and compression is known as \u201cNeutral axis\u201d or \u201cNeutral layer\u201d.\r\n\r\n2. What is bend angle?\r\n\r\nBend angle is the angle between the two extreme positions of bend radius.\r\n\r\nbending angle\r\n\r\n3. List down the types of bending dies?\r\n\r\n \tEdge bending\r\n \tV - Bending\r\n \tU \u2013 Bending\r\n\r\n4. What is spring back in bending?\r\n\r\nThe tendency of the metal tries to resume its original position causing a decrease in bend angle known as spring back,\r\n\r\n5. What does spring back cause in bending?\r\n\r\nSpring back is caused by a larger bend radius.\r\n\r\n6. Spring back depends on the following factors.\r\n\r\n \tMaterial type\r\n \tThickness\r\n \tHardness\r\n \tBend radius\r\n\r\n7. What does meant by bending allowance?\r\n\r\nIt is also called spring back allowance. Spring back allowance is defined as the tendency of sheet metal to change the shape from final shape.\r\n\r\n8. What is meant by coining?\r\n\r\nThe process of pressing the metal in a die to allow the metal to flow into the space on the die face is known as coining.\r\n\r\nRead more : Stretch Forming Process -Advantages and Disadvantages\r\n\r\n9. Mention the application of coining process.\r\n\r\n \tMetal buttons\r\n \tTable wares\r\n \tJewellery\r\n\r\n10. What are the advantages of coining process?\r\n\r\n \tExcellent surface finish can be obtained.\r\n \tMore close tolerances can be achieved.\r\n\r\n11. Define deep drawing?\r\n\r\nDeep drawing is the manufacturing process of forming sheet metal stock, called blanks, into geometrical or irregular shapes which are more than half their diameter in depth.\r\n\r\nRead more : What Is Deep Drawing ? Working Of Deep Drawing Sheet Metal Processes\r\n\r\n12. Define redrawing process.\r\n\r\nThe process of deepening the cup after the first draw is known as redrawing.\r\n\r\n13. What is meant ironing?\r\n\r\nThe process of reducing wall thickness and lengthening of the cup is known as ironing.\r\n\r\n14. List down the type of drawing dies?\r\n\r\n \tSingle action dies\r\n \tDouble action dies\r\n\r\n15. What are the methods of holding pilots?\r\n\r\n \tDirect pilots\r\n \tIndirect pilots\r\n\r\n16. Classify indirect pilots.\r\n\r\n \tAcron type or spherical type.\r\n \tFlatted end type.\r\n\r\n17. Define ductility.\r\n\r\nDuctility is the ability of the material to undergo a change in shape without fracture.\r\n\r\n18. How can we define drawing speed?\r\n\r\nDrawing speed is defined as the velocity at which the punch travels into the drawing die during the drawing process.\r\n\r\n19. What is the purpose of stock-stop?\r\n\r\nIt is used to stop the die at a required distance. It avoids over penetration of die in a materials.\r\n\r\n20. What are draw die inserts?\r\n\r\nDraw die inserts are small tooling segments attached to form a shape during drawing operations.\r\n\r\n\r\n\r\nMore Resources \/articles\r\nTechnical Mechanical Interview Question and Answers\r\nMachine Tool Articles , notes , Interview Que &amp; Ans\r\nManufacturing Technology Notes , Articles\r\nMechanical Subjectwise Basic Concept Notes ,Articles\r\nNew Mechanical Projects 2020 ( All Projects Post Index List )\r\n\r\n\r\n\r\n&nbsp;","headline":"Bending and Forming | Interview Question and Answers","author":{"@type":"Person","name":"Sachin Thorat","url":"\/\/www.gunkrazy.com\/"},"datePublished":"2019-05-10","mainEntityOfPage":"False","dateModified":"February 19, 2020","image":{"@type":"ImageObject","url":"\/\/www.gunkrazy.com\/wp-content\/uploads\/2019\/05\/bending-angle-300x220.jpg","height":220,"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=50">&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=49"><span class="screen-reader-text">Page </span>49</a> <a class="page-numbers" href="?page_num=50"><span class="screen-reader-text">Page </span>50</a> <span aria-current="page" class="page-numbers current"><span class="screen-reader-text">Page </span>51</span> <a class="page-numbers" href="?page_num=52"><span class="screen-reader-text">Page </span>52</a> <a class="page-numbers" href="?page_num=53"><span class="screen-reader-text">Page </span>53</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=52">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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