1
GATE PI 2013
+2
-0.6
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 $$90$$ $$m/min,$$ it is observed that the main (tangential) cutting force is prependicular to the friction force acting at the chip-tool interface. The main (tangential) cutting force is $$1500$$ $$N.$$

The normal force acting at the chip-tool interface in $$N$$ is

A
$$1000$$
B
$$1500$$
C
$$2000$$
D
$$2500$$
2
GATE PI 2010
+2
-0.6
During turning of a low carbon steel bar with TiN coated carbide insert, one needs to improve surface finish without sacrificing material removal rate. To achieve improved surface finish one should
A
Decrease nose radius of the cutting tool and increase depth of cut
B
Increase nose radius of the cutting tool
C
Increase feed and reduce nose radius of the cutting tool
D
Increase depth of cut and increase feed
3
GATE PI 2009
+2
-0.6
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 tool life is $$30min$$. The value of index (n) in the Taylor's tool life equation is
A
$$0.262$$
B
$$0.323$$
C
$$0.423$$
D
$$0.521$$
4
GATE PI 2009
+2
-0.6
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 uncut chip thickness is $$0.2mm.$$

The shear angle (in degrees) is

A
$$26.8$$
B
$$27.8$$
C
$$28.8$$
D
$$29.8$$
GATE PI Subjects
Engineering Mechanics
Strength of Materials
Theory of Machines
Engineering Mathematics
Machine Design
Fluid Mechanics
Heat Transfer
Thermodynamics
Casting
Joining of Materials
Metal Forming
Machine Tools and Machining
Metrology
Industrial Engineering
EXAM MAP
Joint Entrance Examination