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GATE PI

Metal Forming Process

Metal Forming

Previous Years Questions

Marks 1

More
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$$ $...
GATE PI 2015
In an open die forging, a circular disc is gradually compressed between two flat plates. The exponential decay of normal...
GATE PI 2014
A moving mandrel is used in
GATE PI 2014
In a rolling process, the state of stress of the material undergoing deformation is
GATE PI 2013
A solid cylinder of diameter $$100$$ $$mm$$ and height $$50$$ $$mm$$ is forged between two frictionless flat dies to a h...
GATE PI 2012
Hot die steel, used for large solid dies in drop forging, should necessarily have
GATE PI 2010
Cold shut (lap) may occur in products obtained by:
GATE PI 2010
Anisotropy in rolled components is caused by
GATE PI 2009
Cold shut (lap) may occur in products obtained by:
GATE PI 2005
Flash and gutter are provided in drop forging dies at the following stage:
GATE PI 2005
In order to reduce roll pressure in strip rolling, back tension must be applied to strip.
GATE PI 1995
A moving mandrel is used in
GATE PI 1994
Which one of the following manufacturing process requires the provision of 'gutters'
GATE PI 1994
Forces in hot extrusion is a function of the strain hardening component of the billet material.
GATE PI 1994
In order to reduce roll pressure in strip rolling, back tension can be applied to strip.
GATE PI 1994
Thread rolling is restricted to
GATE PI 1992
At $${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 $$12$$ $$mm$$ is to be rolled using two steel rolls, each of $$800$$ $$mm$$ 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 $$200$$ $$mm$$ wide metalic strip is rolled from a thickness $$10$$ $$mm$$ to a th...
GATE PI 2016
Open die forging of a cylinder made of a rigid perfectly plastic material with yield strength of $$200$$ $$MPa$$ having ...
GATE PI 2015
A $$80$$ $$mm$$ thick steel plate with $$400$$ $$mm$$ 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 $$100$$ $$mm$$ 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 $$200$$ $$mm$$ width and $$30$$ $$mm$$ thickness is to be rolled to a thickness of $$25$$ $$mm.$$ 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$$ thic...
GATE PI 1993
A steel wire of length $$100$$ $$m$$ and diameter $$12.214$$ $$mm$$ is drawn to a final diameter of $$10mm.$$ Tensile te...
GATE PI 1990
A steel wire of length $$100$$ $$m$$ and diameter $$12.214$$ $$mm$$ is drawn to a final diameter of $$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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