# Metal Cutting · Machine Tools and Machining · GATE PI

Start Practice## 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?...