Metal Cutting · Machine Tools and Machining · GATE PI

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Marks 1

GATE PI 2016
A single point right handed turning tool is used for straight turning. The feed is $$0.25$$ $$mm/rev$$ and the uncut chip thickness is found to be $$0...
GATE PI 2015
The angle of a twist drill that determines its rake angle is
GATE PI 2015
During turning of mild steel work material, the maximum temperature is observed at
GATE PI 2015
Built-up edge formation decreases under the conditions listed below EXCEPT
GATE PI 2014
A spindle speed of $$300$$ $$rpm$$ and a feed $$0.3mm/revolution$$ are chosen for longitudinal turning operation on an engine lathe. In finishing pass...
GATE PI 2009
Diamond cutting tools are not recommended for machining of ferrous metals due to
GATE PI 2008
Diamond cutting tools are not recommended for machining of ferrous metals to
GATE PI 2006
The cutting tool material normally used for turning steel of very high hardness is
GATE PI 2005
If each abrasive grain is viewed as a cutting tool, then which of the following represents the cutting parameters in common grinding operations?
GATE PI 2005
The effects of setting a boring tool above center height leads to a/an.
GATE PI 1995
Hot hardness is an essential property for
GATE PI 1995
Only negative rake angles are used with the following tool materials
GATE PI 1995
In $$HSS$$ Tool materials the element tungsten can be completely replaced, without changing the material property by
GATE PI 1995
In metal cutting $$BUE$$ formation results in
GATE PI 1995
When the depth of cut is increased, the specific cutting energy
GATE PI 1994
In metal cutting $$BUE$$ formation results in
GATE PI 1994
Only negative rake angles are used with the following tool material
GATE PI 1994
Machinability of steels is improved by the addition of
GATE PI 1992
In metal cutting with a carbide tool, at the maximum recommended speed, the largest $$\% $$ of heat generated goes to the
GATE PI 1991
Thrust force in drilling can be reduced by .................A............... the point angle and by ..........B.......... the helix angle of the drill...
GATE PI 1991
Increase in rake angle causes ..........A................ in chip thickness and .............B......... in shear angle (a) increase / reduction (b) in...
GATE PI 1991
Amount of energy consumption for unit volume of metal removal is maximum in
GATE PI 1990
In comparison to $$HSS$$, super $$HSS$$ contains higher percentage of
GATE PI 1990
$$BUE$$ formation ......A... the cutting force and ......B...... the surface finish (a) decreases/ increases (b) spoils / improves
GATE PI 1989
In $$HSS,$$ the tungsten can be substituted by

Marks 2

GATE PI 2017
In a machining operation with turning tool, the tool life $$(T)$$ is related to cutting speed $$v$$ $$(m/s),$$ feed $$f(mm)$$ and depth of cut $$d(mm)...
GATE PI 2017
The Merchant circle diagram showing various forces associated with a cutting process using a wedge shaped tool is given in the Figure The coefficie...
GATE PI 2016
A cylindrical bar of $$100$$ $$mm$$ diameter is orthogonally straight turned with cutting velocity, feed and depth of cut of $$120$$ $$m/min$$, $$0.25...
GATE PI 2016
A $$60$$ $$mm$$ wide block of low carbon steel is face milled at a cutting speed of $$120$$ $$m/min,$$ feed of $$0.1$$ $$mm$$/tooth and axial depth of...
GATE PI 2015
In an orthogonal machining experiment carried out using a cutting tool with zero degree rake angle, the measured cutting force was $$1700$$ $$N.$$ If ...
GATE PI 2013
Following data refers to an automat and a center lathe, which are being compared to machine a batch of parts in a manufacturing shop Automat will ...
GATE PI 2013
Details pertaining to an orthogonal metal cutting process are given below. Chip thickness ratio $$0.4$$ Under formed thickness $$0.6mm$$ Rake angle $...
GATE PI 2013
Two cutting tools are being compared for a machining operation. The tool life equations are: $$\eqalign{ & \,\,\,\,\,\,\,\,\,\,\,\,Carbi{\mathop...
GATE PI 2013
In orthogonal turning of a bar of $$100$$ $$mm$$ diameter with a feed of $$0.25$$ $$min/rev,$$ depth of cut of $$4$$ $$mm$$ and cutting velocity of $$...
GATE PI 2013
In orthogonal turning of a bar of $$100$$ $$mm$$ diameter with a feed of $$0.25$$ $$min/rev,$$ depth of cut of $$4$$ $$mm$$ and cutting velocity of $$...
GATE PI 2010
During turning of a low carbon steel bar with TiN coated carbide insert, one needs to improve surface finish without sacrificing material removal rate...
GATE PI 2009
In an orthogonal machining operation , the tool life obtained is $$10min$$ at a cutting speed of $$10m/min,$$ while at $$75m/min$$ cutting speed, the ...
GATE PI 2009
An orthogonal operation is carried out at $$20m/min$$ cutting speed, using a cutting tool of rake angle $$15deg$$. The chip thickness is $$0.4mm$$ and...
GATE PI 2009
An orthogonal operation is carried out at $$20m/min$$ cutting speed, using a cutting tool of rake angle $$15deg$$. The chip thickness is $$0.4mm$$ and...
GATE PI 2008
In an orthogonal cutting experiment, an $$HSS$$ tool having the following tool signature in the orthogonal reference system $$(ORS)$$ has been used: ...
GATE PI 2008
In an orthogonal cutting experiment, an $$HSS$$ tool having the following tool signature in the orthogonal reference system $$(ORS)$$ has been used: ...
GATE PI 2008
Brittle materials are machined with tools having zero or negative rake angles because it
GATE PI 2008
During machining, the wear land $$(h)$$ has been plotted against machining time $$(T)$$ as given in the following figure. For a critical wear land of...
GATE PI 2007
In an orthogonal cutting test, the following observations were made Cutting force $$=1200N ;$$ Thrust force $$=500N$$ Tool rake angle $$=zero ;$$ Cu...
GATE PI 2007
In an orthogonal cutting test, the following observations were made Cutting force $$=1200N ;$$ Thrust force $$=500N$$ Tool rake angle $$=zero ;$$ Cu...
GATE PI 2005
In a machining operation chip thickness ratio is $$0.3$$ and the back rake angle of the tool is $${10^ \circ }.$$ What is the value of the shear strai...
GATE PI 2005
Consider the following statements During the third stage of tool-wear, rapid deterioration of tool edge takes place because $$1.$$ Flank wear is onl...
GATE PI 2005
Match List - $${\rm I}$$ with List - $${\rm I}$$$${\rm I}$$ and select the correct answer using the codes given below: ...
GATE PI 2005
Consider the following statements $$1.$$ $$\,\,\,\,\,\,\,\,\,\,\,\,$$ As the cutting speed increases, the cost of production initially reduces, then ...
GATE PI 2005
Match List - $${\rm I}$$ (Cutting tool materials) with List - $${\rm I}$$$${\rm I}$$ (Manufacturing methods) and select the correct answer using the c...
GATE PI 2005
The rake angle of a cutting tool is $${15^ \circ }$$, shear angle $${45^ \circ }$$ and cutting velocity $$35$$ $$m/min$$. What is the velocity of chip...
GATE PI 2005
A batch of $$500$$ jobs of diameter $$50$$ $$mm$$ and length $$100$$ $$mm$$ is to be turned at $$200$$ $$rev/min$$ and feed $$0.2$$ $$mm/rev.$$ The n...
GATE PI 2005
A batch of $$500$$ jobs of diameter $$50$$ $$mm$$ and length $$100$$ $$mm$$ is to be turned at $$200$$ $$rev/min$$ and feed $$0.2$$ $$mm/rev.$$ Apply...
GATE PI 2005
A $$\phi $$ $$40$$ $$mm$$ job is subjected to orthogonal turning by a $$ + {10^ \circ }$$ rake angle tool at $$500$$ $$rev/min.$$ By direct measuremen...
GATE PI 2005
A $$\phi $$ $$40$$ $$mm$$ job is subjected to orthogonal turning by a $$ + {10^ \circ }$$ rake angle tool at $$500$$ $$rev/min.$$ By direct measuremen...
GATE PI 2005
The following data relate to an orthogonal turning process: $$\,\,\,\,\,\,\,\,\,\,\,$$Back rake angle $$=15deg,$$ $$\,\,\,\,\,\,\,\,\,\,\,$$Width of...
GATE PI 2005
The following data relate to an orthogonal turning process: $$\,\,\,\,\,\,\,\,\,\,\,$$Back rake angle $$=15deg,$$ $$\,\,\,\,\,\,\,\,\,\,\,$$Width of...
GATE PI 2004
In which of the choices given below, the cutting tool materials are placed in the ascending order of permissible cutting speed for machining of steel?...
GATE PI 2004
Consider the following statements with respect to the relief angle of cutting tool: $$1.$$ This affects the direction of chip flow. $$2.$$ This reduc...
GATE PI 2004
Two identical cylindrical jobs are turned using (a) a round nosed tool of nose radius $$2$$ $$mm$$ and (b) a sharp corner tool having principal cuttin...
GATE PI 2003
Tool life equation for two tools under consideration are as follows $$\eqalign{ & HSS:\,\,\,\,\,\,\,\,\,\,\,\,\,V{T^{0.2}} = 150 \cr & ...
GATE PI 2003
Orthogonal machining of a steel work-piece is done with a $$HSS$$ tool of zero rake angle. The ratio of the cutting force and the thrust force on the ...
GATE PI 2003
A single point cutting tool with a nose radius of $$0.4$$ $$mm$$ was used to turn a component in a lathe employing a feed rate of $$0.3$$ $$mm/rev.$$ ...
GATE PI 2003
A cylinder of $$25mm$$ diameter and $$100mm$$ length is turned with a tool, for which the relation $$V{T^{0.25}} = 55$$ is applicable. The cutting vel...
GATE PI 2002
Two different tools $$A$$ and $$B$$ having nose radius of $$0.6mm$$ and $$0.33mm$$ respectively are used to machine $$C-45$$ steel employing feed rate...
GATE PI 1995
A $$60deg$$ symmetrical $$V$$ tool is used in shaping a work piece with a depth of cut of $$0.1$$$$mm$$ and feed of $$0.1mm/stroke$$. The theoretical ...
GATE PI 1994
The heat generated in metal cutting is dissipated in different proportions into environment, tool, chip and work-piece. The correct order of this prop...
GATE PI 1993
In a cutting test with $$0.3mm$$ flank wear as tool failure criterion, a tool life of $$10min$$ was obtained at a cutting velocity of $$20m/min.$$ Tak...
GATE PI 1990
A single point cutting tool with $${12^0}$$ rake angle is used for orthogonal machining of a ductile material. The shear plane angle for the theoretic...

Marks 5

GATE PI 2003
The following data refers to an orthogonal machining of mild steel with a single point $$HSS$$ tool. Rake angle of tool $$ = {10^ \circ },$$ uncut chi...
GATE PI 2003
The following data refers to an orthogonal machining of mild steel with a single point $$HSS$$ tool. Rake angle of tool $$ = {10^ \circ },$$ uncut chi...
GATE PI 2002
A cutting tool is designated in 'Orthogonal Rake System' as: $$${0^ \circ } - {0^ \circ } - {6^ \circ } - {6^ \circ } - {25^ \circ } - {75^ \circ } -...
GATE PI 2001
Tool life in drilling steel using $$HSS$$ drill is expressed as $${T^{0.2}} = 9.8\,\,{D^{0.4}}\,\,/\,\,V\,{s^{0.5}}$$ where $$D$$ is the drill diamet...
GATE PI 2001
In certain machining operation with a cutting speed of $$50$$ $$m/min,$$ tool life of $$45$$ minutes was observed, when the cutting speed was increase...
GATE PI 1995
In an orthogonal machining experiment using a tool having $${6^ \circ }.$$ Rake angle, the following data were collected. Cutting speed $$0.5$$ $$m/se...
GATE PI 1995
In an orthogonal machining experiment using a tool having $${6^ \circ }.$$ Rake angle, the following data were collected. Cutting speed $$0.5$$ $$m/se...
GATE PI 1995
In an orthogonal machining experiment using a tool having $${6^ \circ }.$$ Rake angle, the following data were collected. Cutting speed $$0.5$$ $$m/se...
GATE PI 1995
In a single pass turning operation the cutting speed is the only variable Based on the cutting time cost and the cutting edge cost. The tool life for ...
GATE PI 1994
Parting-off operation is carried out on a cylindrical work-piece of $$100mm$$ diameter. The groove width is $$2$$ $$mm$$ and an in feed of $$0.2$$ $$m...
GATE PI 1994
Parting-off operation is carried out on a cylindrical work-piece of $$100mm$$ diameter. The groove width is $$2$$ $$mm$$ and an in feed of $$0.2$$ $$m...
GATE PI 1994
A part can be machined in $$30$$ minutes on an engine lathe where as it can be machined in $$6$$ minutes on a turret lathe. However, it would cost add...
GATE PI 1994
In an orthogonal cutting operation, the cutting velocity is $$30$$ $$m/min$$ and the chip velocity $$15$$ $$m/min.$$ If the rake angle of the tool is ...
GATE PI 1994
In an orthogonal cutting operation, the cutting velocity is $$30$$ $$m/min$$ and the chip velocity $$15$$ $$m/min.$$ If the rake angle of the tool is ...
GATE PI 1994
In an orthogonal cutting operation, The depth of cut $$=2$$ $$mm,$$ Width of cut $$=15$$ $$mm,$$ Cutting speed $$=0.5$$ $$m/s$$ and The rake angle ...
GATE PI 1994
In an orthogonal cutting operation, The depth of cut $$=2$$ $$mm,$$ Width of cut $$=15$$ $$mm,$$ Cutting speed $$=0.5$$ $$m/s$$ and The rake angle ...
GATE PI 1994
In an orthogonal cutting operation, The depth of cut $$=2$$ $$mm,$$ Width of cut $$=15$$ $$mm,$$ Cutting speed $$=0.5$$ $$m/s$$ and The rake angle ...
GATE PI 1992
A generalized tool life equation for carbide tool for machining steel is given by $$\,\,\,\,\,\,\,\,\,\,$$$$\,\,\,\,$$ $$V{T^a}{F^b}{D^c} = K,$$ Where...
GATE PI 1992
A generalized tool life equation for carbide tool for machining steel is given by $$\,\,\,\,\,\,\,\,\,\,$$$$\,\,\,\,$$ $$V{T^a}{F^b}{D^c} = K,$$ Where...
GATE PI 1991
During orthogonal turning a steel rod at feed $$0.25$$ $$mm$$ per revolution and depth of cut $$4.00$$ $$mm$$ by a tool of geometry $${0^0},\, - {10^0...
GATE PI 1990
A parting tool has a ground front clearance angle of $${6^0}$$ and the back rake angle of $${10^0}$$. The tool, by mistake, was set $$1.5$$ $$mm$$ abo...
GATE PI 1990
A parting tool has a ground front clearance angle of $${6^0}$$ and the back rake angle of $${10^0}$$. The tool, by mistake, was set $$1.5$$ $$mm$$ abo...
GATE PI 1990
The following data apply to machining a part on turret lathe and a general purpose lathe The setup cost and the cost for special tooling on the turre...
GATE PI 1989
Calculate the tonnage capacity of the broaching machine required to broach on the hole under the following conditions. Diameter of the finished hole ...
GATE PI 1989
The results of machining steel with $$2$$ grades of tool material are given below. For a $$180$$ $$min.$$ Tool life which tool is recommended and why?...
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