GATE PI
Machine Tools and Machining
Metal Cutting
Previous Years Questions

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 $$0... The angle of a twist drill that determines its rake angle is During turning of mild steel work material, the maximum temperature is observed at Built-up edge formation decreases under the conditions listed below EXCEPT A spindle speed of$$300rpm$$and a feed$$0.3mm/revolution$$are chosen for longitudinal turning operation on an engine lathe. In finishing pass... Diamond cutting tools are not recommended for machining of ferrous metals due to Diamond cutting tools are not recommended for machining of ferrous metals to The cutting tool material normally used for turning steel of very high hardness is The effects of setting a boring tool above center height leads to a/an. If each abrasive grain is viewed as a cutting tool, then which of the following represents the cutting parameters in common grinding operations? Hot hardness is an essential property for Only negative rake angles are used with the following tool materials In$$HSS$$Tool materials the element tungsten can be completely replaced, without changing the material property by When the depth of cut is increased, the specific cutting energy In metal cutting$$BUE$$formation results in Machinability of steels is improved by the addition of In metal cutting$$BUE$$formation results in Only negative rake angles are used with the following tool material In metal cutting with a carbide tool, at the maximum recommended speed, the largest$$\% $$of heat generated goes to the Thrust force in drilling can be reduced by .................A............... the point angle and by ..........B.......... the helix angle of the drill... Increase in rake angle causes ..........A................ in chip thickness and .............B......... in shear angle (a) increase / reduction (b) in... Amount of energy consumption for unit volume of metal removal is maximum in$$BUE$$formation ......A... the cutting force and ......B...... the surface finish (a) decreases/ increases (b) spoils / improves In comparison to$$HSS$$, super$$HSS$$contains higher percentage of In$$HSS,$$the tungsten can be substituted by ## Marks 2 In a machining operation with turning tool, the tool life$$(T)$$is related to cutting speed$$v(m/s),$$feed$$f(mm)$$and depth of cut$$d(mm)...
The Merchant circle diagram showing various forces associated with a cutting process using a wedge shaped tool is given in the Figure The coefficie...
A cylindrical bar of $$100$$ $$mm$$ diameter is orthogonally straight turned with cutting velocity, feed and depth of cut of $$120$$ $$m/min$$, $$0.25... A$$60mm$$wide block of low carbon steel is face milled at a cutting speed of$$120m/min,$$feed of$$0.1mm$$/tooth and axial depth of... In an orthogonal machining experiment carried out using a cutting tool with zero degree rake angle, the measured cutting force was$$1700N.$$If ... Two cutting tools are being compared for a machining operation. The tool life equations are:$$\eqalign{ & \,\,\,\,\,\,\,\,\,\,\,\,Carbi{\mathop...
Details pertaining to an orthogonal metal cutting process are given below. Chip thickness ratio $$0.4$$ Under formed thickness $$0.6mm$$ Rake angle ... 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 ... 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 $$... In orthogonal turning of a bar of$$100mm$$diameter with a feed of$$0.25min/rev,$$depth of cut of$$4mm$$and cutting velocity of$$... During turning of a low carbon steel bar with TiN coated carbide insert, one needs to improve surface finish without sacrificing material removal rate... 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 ... 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... 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... In an orthogonal cutting experiment, an $$HSS$$ tool having the following tool signature in the orthogonal reference system $$(ORS)$$ has been used: ... In an orthogonal cutting experiment, an $$HSS$$ tool having the following tool signature in the orthogonal reference system $$(ORS)$$ has been used: ... Brittle materials are machined with tools having zero or negative rake angles because it 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... In an orthogonal cutting test, the following observations were made Cutting force $$=1200N ;$$ Thrust force $$=500N$$ Tool rake angle $$=zero ;$$ Cu... In an orthogonal cutting test, the following observations were made Cutting force $$=1200N ;$$ Thrust force $$=500N$$ Tool rake angle $$=zero ;$$ Cu... 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... Consider the following statements During the third stage of tool-wear, rapid deterioration of tool edge takes place because $$1.$$ Flank wear is onl... 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... Match List - $${\rm I}$$ with List - $${\rm I}$$$${\rm I}$$ and select the correct answer using the codes given below: ... Consider the following statements $$1.$$ $$\,\,\,\,\,\,\,\,\,\,\,\,$$ As the cutting speed increases, the cost of production initially reduces, then ... Match List - $${\rm I}$$ (Cutting tool materials) with List - $${\rm I}$$$${\rm I}$$ (Manufacturing methods) and select the correct answer using the c... 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... 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... A $$\phi$$ $$40$$ $$mm$$ job is subjected to orthogonal turning by a $$+ {10^ \circ }$$ rake angle tool at $$500$$ $$rev/min.$$ By direct measuremen... A $$\phi$$ $$40$$ $$mm$$ job is subjected to orthogonal turning by a $$+ {10^ \circ }$$ rake angle tool at $$500$$ $$rev/min.$$ By direct measuremen... The following data relate to an orthogonal turning process: $$\,\,\,\,\,\,\,\,\,\,\,$$Back rake angle $$=15deg,$$ $$\,\,\,\,\,\,\,\,\,\,\,$$Width of... The following data relate to an orthogonal turning process: $$\,\,\,\,\,\,\,\,\,\,\,$$Back rake angle $$=15deg,$$ $$\,\,\,\,\,\,\,\,\,\,\,$$Width of... 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?... Consider the following statements with respect to the relief angle of cutting tool: $$1.$$ This affects the direction of chip flow. $$2.$$ This reduc... 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... Tool life equation for two tools under consideration are as follows \eqalign{ & HSS:\,\,\,\,\,\,\,\,\,\,\,\,\,V{T^{0.2}} = 150 \cr & ... Orthogonal machining of a steel work-piece is done with aHSS$$tool of zero rake angle. The ratio of the cutting force and the thrust force on the ... A single point cutting tool with a nose radius of$$0.4mm$$was used to turn a component in a lathe employing a feed rate of$$0.3mm/rev.$$... A cylinder of$$25mm$$diameter and$$100mm$$length is turned with a tool, for which the relation$$V{T^{0.25}} = 55$$is applicable. The cutting vel... Two different tools$$A$$and$$B$$having nose radius of$$0.6mm$$and$$0.33mm$$respectively are used to machine$$C-45$$steel employing feed rate... A$$60deg$$symmetrical$$V$$tool is used in shaping a work piece with a depth of cut of$$0.1mm$$and feed of$$0.1mm/stroke$$. The theoretical ... The heat generated in metal cutting is dissipated in different proportions into environment, tool, chip and work-piece. The correct order of this prop... In a cutting test with$$0.3mm$$flank wear as tool failure criterion, a tool life of$$10min$$was obtained at a cutting velocity of$$20m/min.$$Tak... A single point cutting tool with$${12^0}$$rake angle is used for orthogonal machining of a ductile material. The shear plane angle for the theoretic... ## Marks 5 The following data refers to an orthogonal machining of mild steel with a single point$$HSS$$tool. Rake angle of tool$$ = {10^ \circ },$$uncut chi... The following data refers to an orthogonal machining of mild steel with a single point$$HSS$$tool. Rake angle of tool$$ = {10^ \circ },$$uncut chi... A cutting tool is designated in 'Orthogonal Rake System' as:$${0^ \circ } - {0^ \circ } - {6^ \circ } - {6^ \circ } - {25^ \circ } - {75^ \circ } -...
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...
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...
In an orthogonal machining experiment using a tool having $${6^ \circ }.$$ Rake angle, the following data were collected. Cutting speed $$0.5$$ $$m/se... In an orthogonal machining experiment using a tool having$${6^ \circ }.$$Rake angle, the following data were collected. Cutting speed$$0.5m/se...
In an orthogonal machining experiment using a tool having $${6^ \circ }.$$ Rake angle, the following data were collected. Cutting speed $$0.5$$ $$m/se... In a single pass turning operation the cutting speed is the only variable Based on the cutting time cost and the cutting edge cost. The tool life for ... Parting-off operation is carried out on a cylindrical work-piece of$$100mm$$diameter. The groove width is$$2mm$$and an in feed of$$0.2m...
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 $$0.2$$ $$m... A part can be machined in$$30$$minutes on an engine lathe where as it can be machined in$$6$$minutes on a turret lathe. However, it would cost add... In an orthogonal cutting operation, the cutting velocity is$$30m/min$$and the chip velocity$$15m/min.$$If the rake angle of the tool is ... In an orthogonal cutting operation, the cutting velocity is$$30m/min$$and the chip velocity$$15m/min.$$If the rake angle of the tool is ... In an orthogonal cutting operation, The depth of cut$$=2mm,$$Width of cut$$=15mm,$$Cutting speed$$=0.5m/s$$and The rake angle ... In an orthogonal cutting operation, The depth of cut$$=2mm,$$Width of cut$$=15mm,$$Cutting speed$$=0.5m/s$$and The rake angle ... In an orthogonal cutting operation, The depth of cut$$=2mm,$$Width of cut$$=15mm,$$Cutting speed$$=0.5m/s$$and The rake angle ... A generalized tool life equation for carbide tool for machining steel is given by$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,V{T^a}{F^b}{D^c} = K,$$Where... A generalized tool life equation for carbide tool for machining steel is given by$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,V{T^a}{F^b}{D^c} = K,$$Where... During orthogonal turning a steel rod at feed$$0.25mm$$per revolution and depth of cut$$4.00mm$$by a tool of geometry$${0^0},\, - {10^0...
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...
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...
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...
Calculate the tonnage capacity of the broaching machine required to broach on the hole under the following conditions. Diameter of the finished hole ...
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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Joint Entrance Examination