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GATE PI
Metal Cutting
Machine Tools and Machining
Previous Years Questions
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Marks 1
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A single point right handed turning tool is used for straight turning. The feed is $$0.25$$ $$mm/rev$$ and the uncut chi...
GATE PI 2016
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Built-up edge formation decreases under the conditions listed below EXCEPT
GATE PI 2015
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During turning of mild steel work material, the maximum temperature is observed at
GATE PI 2015
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The angle of a twist drill that determines its rake angle is
GATE PI 2015
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A spindle speed of $$300$$ $$rpm$$ and a feed $$0.3mm/revolution$$ are chosen for longitudinal turning operation on an e...
GATE PI 2014
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Diamond cutting tools are not recommended for machining of ferrous metals due to
GATE PI 2009
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Diamond cutting tools are not recommended for machining of ferrous metals to
GATE PI 2008
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The cutting tool material normally used for turning steel of very high hardness is
GATE PI 2006
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The effects of setting a boring tool above center height leads to a/an.
GATE PI 2005
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If each abrasive grain is viewed as a cutting tool, then which of the following represents the cutting parameters in com...
GATE PI 2005
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When the depth of cut is increased, the specific cutting energy
GATE PI 1995
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In metal cutting $$BUE$$ formation results in
GATE PI 1995
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In $$HSS$$ Tool materials the element tungsten can be completely replaced, without changing the material property by
GATE PI 1995
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Only negative rake angles are used with the following tool materials
GATE PI 1995
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Hot hardness is an essential property for
GATE PI 1995
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Machinability of steels is improved by the addition of
GATE PI 1994
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Only negative rake angles are used with the following tool material
GATE PI 1994
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In metal cutting $$BUE$$ formation results in
GATE PI 1994
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In metal cutting with a carbide tool, at the maximum recommended speed, the largest $$\% $$ of heat generated goes to th...
GATE PI 1992
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Amount of energy consumption for unit volume of metal removal is maximum in
GATE PI 1991
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Increase in rake angle causes ..........A................ in chip thickness and .............B......... in shear angle (...
GATE PI 1991
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Thrust force in drilling can be reduced by .................A............... the point angle and by ..........B............
GATE PI 1991
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$$BUE$$ formation ......A... the cutting force and ......B...... the surface finish (a) decreases/ increases (b) spoils...
GATE PI 1990
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In comparison to $$HSS$$, super $$HSS$$ contains higher percentage of
GATE PI 1990
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In $$HSS,$$ the tungsten can be substituted by
GATE PI 1989
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Marks 2
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The Merchant circle diagram showing various forces associated with a cutting process using a wedge shaped tool is given ...
GATE PI 2017
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In a machining operation with turning tool, the tool life $$(T)$$ is related to cutting speed $$v$$ $$(m/s),$$ feed $$f(...
GATE PI 2017
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A $$60$$ $$mm$$ wide block of low carbon steel is face milled at a cutting speed of $$120$$ $$m/min,$$ feed of $$0.1$$ $...
GATE PI 2016
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A cylindrical bar of $$100$$ $$mm$$ diameter is orthogonally straight turned with cutting velocity, feed and depth of cu...
GATE PI 2016
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In an orthogonal machining experiment carried out using a cutting tool with zero degree rake angle, the measured cutting...
GATE PI 2015
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In orthogonal turning of a bar of $$100$$ $$mm$$ diameter with a feed of $$0.25$$ $$min/rev,$$ depth of cut of $$4$$ $$m...
GATE PI 2013
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In orthogonal turning of a bar of $$100$$ $$mm$$ diameter with a feed of $$0.25$$ $$min/rev,$$ depth of cut of $$4$$ $$m...
GATE PI 2013
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Two cutting tools are being compared for a machining operation. The tool life equations are: $$\eqalign{ & \,\,\,\...
GATE PI 2013
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Details pertaining to an orthogonal metal cutting process are given below. Chip thickness ratio $$0.4$$ Under formed th...
GATE PI 2013
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Following data refers to an automat and a center lathe, which are being compared to machine a batch of parts in a manuf...
GATE PI 2013
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During turning of a low carbon steel bar with TiN coated carbide insert, one needs to improve surface finish without sac...
GATE PI 2010
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An orthogonal operation is carried out at $$20m/min$$ cutting speed, using a cutting tool of rake angle $$15deg$$. The c...
GATE PI 2009
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An orthogonal operation is carried out at $$20m/min$$ cutting speed, using a cutting tool of rake angle $$15deg$$. The c...
GATE PI 2009
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In an orthogonal machining operation , the tool life obtained is $$10min$$ at a cutting speed of $$10m/min,$$ while at $...
GATE PI 2009
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During machining, the wear land $$(h)$$ has been plotted against machining time $$(T)$$ as given in the following figure...
GATE PI 2008
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Brittle materials are machined with tools having zero or negative rake angles because it
GATE PI 2008
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In an orthogonal cutting experiment, an $$HSS$$ tool having the following tool signature in the orthogonal reference sys...
GATE PI 2008
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In an orthogonal cutting experiment, an $$HSS$$ tool having the following tool signature in the orthogonal reference sys...
GATE PI 2008
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In an orthogonal cutting test, the following observations were made Cutting force $$=1200N ;$$ Thrust force $$=500N$$ ...
GATE PI 2007
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In an orthogonal cutting test, the following observations were made Cutting force $$=1200N ;$$ Thrust force $$=500N$$ ...
GATE PI 2007
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The following data relate to an orthogonal turning process: $$\,\,\,\,\,\,\,\,\,\,\,$$Back rake angle $$=15deg,$$ $$\,...
GATE PI 2005
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The following data relate to an orthogonal turning process: $$\,\,\,\,\,\,\,\,\,\,\,$$Back rake angle $$=15deg,$$ $$\,...
GATE PI 2005
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A $$\phi $$ $$40$$ $$mm$$ job is subjected to orthogonal turning by a $$ + {10^ \circ }$$ rake angle tool at $$500$$ $$r...
GATE PI 2005
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A $$\phi $$ $$40$$ $$mm$$ job is subjected to orthogonal turning by a $$ + {10^ \circ }$$ rake angle tool at $$500$$ $$r...
GATE PI 2005
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A batch of $$500$$ jobs of diameter $$50$$ $$mm$$ and length $$100$$ $$mm$$ is to be turned at $$200$$ $$rev/min$$ and f...
GATE PI 2005
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A batch of $$500$$ jobs of diameter $$50$$ $$mm$$ and length $$100$$ $$mm$$ is to be turned at $$200$$ $$rev/min$$ and f...
GATE PI 2005
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The rake angle of a cutting tool is $${15^ \circ }$$, shear angle $${45^ \circ }$$ and cutting velocity $$35$$ $$m/min$$...
GATE PI 2005
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Match List - $${\rm I}$$ (Cutting tool materials) with List - $${\rm I}$$$${\rm I}$$ (Manufacturing methods) and select ...
GATE PI 2005
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Consider the following statements $$1.$$ $$\,\,\,\,\,\,\,\,\,\,\,\,$$ As the cutting speed increases, the cost of produc...
GATE PI 2005
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Match List - $${\rm I}$$ with List - $${\rm I}$$$${\rm I}$$ and select the correct answer using the codes given below: ...
GATE PI 2005
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Consider the following statements During the third stage of tool-wear, rapid deterioration of tool edge takes place bec...
GATE PI 2005
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In a machining operation chip thickness ratio is $$0.3$$ and the back rake angle of the tool is $${10^ \circ }.$$ What i...
GATE PI 2005
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Two identical cylindrical jobs are turned using (a) a round nosed tool of nose radius $$2$$ $$mm$$ and (b) a sharp corne...
GATE PI 2004
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Consider the following statements with respect to the relief angle of cutting tool: $$1.$$ This affects the direction of...
GATE PI 2004
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In which of the choices given below, the cutting tool materials are placed in the ascending order of permissible cutting...
GATE PI 2004
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A cylinder of $$25mm$$ diameter and $$100mm$$ length is turned with a tool, for which the relation $$V{T^{0.25}} = 55$$ ...
GATE PI 2003
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A single point cutting tool with a nose radius of $$0.4$$ $$mm$$ was used to turn a component in a lathe employing a fee...
GATE PI 2003
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Orthogonal machining of a steel work-piece is done with a $$HSS$$ tool of zero rake angle. The ratio of the cutting forc...
GATE PI 2003
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Tool life equation for two tools under consideration are as follows $$\eqalign{ & HSS:\,\,\,\,\,\,\,\,\,\,\,\,\,V...
GATE PI 2003
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Two different tools $$A$$ and $$B$$ having nose radius of $$0.6mm$$ and $$0.33mm$$ respectively are used to machine $$C-...
GATE PI 2002
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A $$60deg$$ symmetrical $$V$$ tool is used in shaping a work piece with a depth of cut of $$0.1$$$$mm$$ and feed of $$0....
GATE PI 1995
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The heat generated in metal cutting is dissipated in different proportions into environment, tool, chip and work-piece. ...
GATE PI 1994
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In a cutting test with $$0.3mm$$ flank wear as tool failure criterion, a tool life of $$10min$$ was obtained at a cuttin...
GATE PI 1993
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A single point cutting tool with $${12^0}$$ rake angle is used for orthogonal machining of a ductile material. The shear...
GATE PI 1990
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Marks 5
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The following data refers to an orthogonal machining of mild steel with a single point $$HSS$$ tool. Rake angle of tool ...
GATE PI 2003
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The following data refers to an orthogonal machining of mild steel with a single point $$HSS$$ tool. Rake angle of tool ...
GATE PI 2003
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A cutting tool is designated in 'Orthogonal Rake System' as: $$${0^ \circ } - {0^ \circ } - {6^ \circ } - {6^ \circ } -...
GATE PI 2002
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In certain machining operation with a cutting speed of $$50$$ $$m/min,$$ tool life of $$45$$ minutes was observed, when ...
GATE PI 2001
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Tool life in drilling steel using $$HSS$$ drill is expressed as $${T^{0.2}} = 9.8\,\,{D^{0.4}}\,\,/\,\,V\,{s^{0.5}}$$ w...
GATE PI 2001
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In a single pass turning operation the cutting speed is the only variable Based on the cutting time cost and the cutting...
GATE PI 1995
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In an orthogonal machining experiment using a tool having $${6^ \circ }.$$ Rake angle, the following data were collected...
GATE PI 1995
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In an orthogonal machining experiment using a tool having $${6^ \circ }.$$ Rake angle, the following data were collected...
GATE PI 1995
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In an orthogonal machining experiment using a tool having $${6^ \circ }.$$ Rake angle, the following data were collected...
GATE PI 1995
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In an orthogonal cutting operation, The depth of cut $$=2$$ $$mm,$$ Width of cut $$=15$$ $$mm,$$ Cutting speed $$=0.5$...
GATE PI 1994
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In an orthogonal cutting operation, The depth of cut $$=2$$ $$mm,$$ Width of cut $$=15$$ $$mm,$$ Cutting speed $$=0.5$...
GATE PI 1994
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In an orthogonal cutting operation, The depth of cut $$=2$$ $$mm,$$ Width of cut $$=15$$ $$mm,$$ Cutting speed $$=0.5$...
GATE PI 1994
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In an orthogonal cutting operation, the cutting velocity is $$30$$ $$m/min$$ and the chip velocity $$15$$ $$m/min.$$ If ...
GATE PI 1994
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In an orthogonal cutting operation, the cutting velocity is $$30$$ $$m/min$$ and the chip velocity $$15$$ $$m/min.$$ If ...
GATE PI 1994
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A part can be machined in $$30$$ minutes on an engine lathe where as it can be machined in $$6$$ minutes on a turret lat...
GATE PI 1994
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Parting-off operation is carried out on a cylindrical work-piece of $$100mm$$ diameter. The groove width is $$2$$ $$mm$$...
GATE PI 1994
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Parting-off operation is carried out on a cylindrical work-piece of $$100mm$$ diameter. The groove width is $$2$$ $$mm$$...
GATE PI 1994
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A generalized tool life equation for carbide tool for machining steel is given by $$\,\,\,\,\,\,\,\,\,\,$$$$\,\,\,\,$$ $...
GATE PI 1992
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A generalized tool life equation for carbide tool for machining steel is given by $$\,\,\,\,\,\,\,\,\,\,$$$$\,\,\,\,$$ $...
GATE PI 1992
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During orthogonal turning a steel rod at feed $$0.25$$ $$mm$$ per revolution and depth of cut $$4.00$$ $$mm$$ by a tool ...
GATE PI 1991
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The following data apply to machining a part on turret lathe and a general purpose lathe The setup cost and the cost fo...
GATE PI 1990
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A parting tool has a ground front clearance angle of $${6^0}$$ and the back rake angle of $${10^0}$$. The tool, by mista...
GATE PI 1990
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A parting tool has a ground front clearance angle of $${6^0}$$ and the back rake angle of $${10^0}$$. The tool, by mista...
GATE PI 1990
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The results of machining steel with $$2$$ grades of tool material are given below. For a $$180$$ $$min.$$ Tool life whic...
GATE PI 1989
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Calculate the tonnage capacity of the broaching machine required to broach on the hole under the following conditions. ...
GATE PI 1989
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