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## Marks 1

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A steel wire of $$2$$ $$mm$$ diameter is to be drawn from a wire of $$5mm$$ diameter. The value of true strain developed...
GATE PI 2017
The maximum reduction per pass during wire drawing of an aluminium alloy ignoring friction and redundant work is $$77\% ... GATE PI 2015 In rolling of a flat strip, the relative velocity of strip with respect to the roller is GATE PI 2015 The true stress at fracture of a tensile tested specimen, having an initial diameter of specimen at fracture is$$10$$... GATE PI 2015 In an open die forging, a circular disc is gradually compressed between two flat plates. The exponential decay of normal... GATE PI 2014 A moving mandrel is used in GATE PI 2014 In a rolling process, the state of stress of the material undergoing deformation is GATE PI 2013 A solid cylinder of diameter$$100mm$$and height$$50mm$$is forged between two frictionless flat dies to a h... GATE PI 2012 Hot die steel, used for large solid dies in drop forging, should necessarily have GATE PI 2010 Cold shut (lap) may occur in products obtained by: GATE PI 2010 Anisotropy in rolled components is caused by GATE PI 2009 Cold shut (lap) may occur in products obtained by: GATE PI 2005 Flash and gutter are provided in drop forging dies at the following stage: GATE PI 2005 In order to reduce roll pressure in strip rolling, back tension must be applied to strip. GATE PI 1995 A moving mandrel is used in GATE PI 1994 Which one of the following manufacturing process requires the provision of 'gutters' GATE PI 1994 Forces in hot extrusion is a function of the strain hardening component of the billet material. GATE PI 1994 In order to reduce roll pressure in strip rolling, back tension can be applied to strip. GATE PI 1994 Thread rolling is restricted to GATE PI 1992 At$${1000^ \circ }C$$the crystallographic structure of iron is .................... GATE PI 1991 Seamless long steel tubes are manufactured by rolling, drawing and ............. GATE PI 1991 While rolling a strip the peripheral velocity of the roll is ..... A .... than the entry velocity of the strip and is ..... GATE PI 1990 Semi brittle materials can be extruded by GATE PI 1990 At the last hammer stroke the excess material from the finishing cavity of a forging die is pushed into ............. GATE PI 1989 Collapsible tubes are made by GATE PI 1989 The blank diameter used in thread rolling will be GATE PI 1989 ## Marks 2 More A metallic strip having a thickness of$$12mm$$is to be rolled using two steel rolls, each of$$800mm$$diame... GATE PI 2017 Two solid cylinders of equal diameter have different heights. They are compressed plastically by a pair of rigid dies to... GATE PI 2016 In a single-pass rolling operation, a$$200mm$$wide metalic strip is rolled from a thickness$$10mm$$to a th... GATE PI 2016 Open die forging of a cylinder made of a rigid perfectly plastic material with yield strength of$$200MPa$$having ... GATE PI 2015 A$$80mm$$thick steel plate with$$400mm$$width is rolled to$$40mm$$thickness in$$4$$passes with equal r... GATE PI 2014 In a single pass rolling process using$$410mm$$diameter steel rollers, a strip of width$$140mm$$and thickness$$8mm$... GATE PI 2012 In multi-pass operation, a round bar of $$10$$ $$mm$$ diameter and $$100$$ $$mm$$ length is reduced in cross-section by ... GATE PI 2011 In multi-pass operation, a round bar of $$10$$ $$mm$$ diameter and $$100$$ $$mm$$ length is reduced in cross-section by ... GATE PI 2011 The thickness of a plate is reduced from $$30$$ $$mm$$ to $$10$$ $$mm$$ by successive cold rolling passes using identica... GATE PI 2011 During open die forging process using two flat and parallel dies, a solid steel disc of initial radius $$({R_{IN}})\,\,2... GATE PI 2010 In a rolling process, the roll separating force can be decreased by GATE PI 2010 Using direct extrusion process, a round billet of$$100mm$$length and$$50mm$$diameter is extruded. Considering a... GATE PI 2009 A$$10mm$$diameter annealed steel wire is drawn through a die at a speed of$$0.5/sec$$to reduce the diameter by$$20\... GATE PI 2008 By application of tensile force, the cross sectional area of bar $$' P '$$ is first reduced by $$30\%$$ and then by an ... GATE PI 2008 A $$10mm$$ diameter annealed steel wire is drawn through a die at a speed of $$0.5/sec$$ to reduce the diameter by $$20\... GATE PI 2008 In a rolling process, thickness of a strip is reduced from$$4mm$$to$$3mm$$using$$300mm$$diameter rolls rotating at... GATE PI 2008 The maximum possible percentage reduction in area per pass during wire drawing of an ideal plastic material without fric... GATE PI 2007 A solid cylindrical stainless steel work piece of$$200mm$$diameter and$$150mm$$height. This component is reduced by ... GATE PI 2006 A copper strip of$$200mm$$width and$$30mm$$thickness is to be rolled to a thickness of$$25mm.$$The ... GATE PI 2006 Consider the following statements: In comparison to hot working, in cold working,$$1.$$Higher forces are required$$2... GATE PI 2005 Assertion (A) : Cold working of metals result in increase of strength and hardness. Reason (R) : Cold working reduces t... GATE PI 2005 The true stress-true strain curve is given by $$\sigma = 1400\,{\varepsilon ^{0.33}},$$ where the stress $$\sigma$$ is... GATE PI 2005 A round billet made of brass is to be extruded (extrusion constant $$=250$$ $$MPa$$ ) at $${700^ \circ }C.$$ The billet ... GATE PI 2005 A level having $${90^0}$$ bend is to be produced by drop forging using mild steel bar as raw material. The various opera... GATE PI 2005 The extrusion process(es) used for the production of toothpaste tubes is / are $$1.$$ Tube extrusion $$2.$$ Forward extr... GATE PI 2004 Cold working produces the following effects $$1.$$$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ Stress are set up in the material $$... GATE PI 2003 Consider the following steps in forging a connecting rod from the bar stock$$1.$$blocking$$\,\,\,\,\,\,\,\,\,\,... GATE PI 2003 An annealed copper wire of $$25 mm$$ diameter is drawn into a wire of $$5$$ $$mm$$ dia. The average yield stress in this... GATE PI 1994 ... GATE PI 1992 To stress relive a cold worked steel part, it is heated to a temp close to ..... A....... and grains obtained after cool... GATE PI 1992 If the elongation factor during rolling of an ingot is $$1.22.$$ The minimum number of passes needed to produce a sectio... GATE PI 1992 ## Marks 5 More In a single pass flat rolling operation, a $$400$$ $$mm$$ wide steel strip having a thickness of $$10mm$$ is reduced to ... GATE PI 2003 In a single pass flat rolling operation, a $$400mm$$ wide steel strip having a thickness of $$10mm$$ is reduced to $$8mm... GATE PI 2003 Calculate the minimum number of hot rolling passes necessary to reduce an ingot of$$200mm$$thickness to$$100mm$$thic... GATE PI 1993 A steel wire of length$$100m$$and diameter$$12.214mm$$is drawn to a final diameter of$$10mm.$$Tensile te... GATE PI 1990 A steel wire of length$$100m$$and diameter$$12.214mm$$is drawn to a final diameter of$$10mm.$$Tensile te... GATE PI 1990 In a wire drawing operation diameter of$$6mm$$is reduced in stages to a diameter of$$1.34mm.$\$ Assuming ideally rigid...
GATE PI 1989

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