1
GATE PI 2013
MCQ (Single Correct Answer)
+2
-0.6
Two cutting tools are being compared for a machining operation. The tool life equations are:
$$\eqalign{ & \,\,\,\,\,\,\,\,\,\,\,\,Carbi{\mathop{\rm de}\nolimits} \,\,tool:\,\,\,\,\,\,\,\,\,\,\,\,V{T^{1.6}} = 3000 \cr & \,\,\,\,\,\,\,\,\,\,\,\,HSS\,\,tool:\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,V{T^{0.6}} = 200 \cr} $$

Where $$V$$ is the cutting speed in $$m/min$$ and $$T$$ is the tool life in $$min.$$ The carbide tool will provide higher tool life if the cutting speed in $$m/min$$ exceeds

A
$$15.0$$
B
$$39.4$$
C
$$49.3$$
D
$$60.0$$
2
GATE PI 2013
MCQ (Single Correct Answer)
+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
$$2500$$
3
GATE PI 2013
MCQ (Single Correct Answer)
+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 orthogonal rake angle of the cutting tool in degree is

A
zero
B
$$3.58$$
C
$$5$$
D
$$7.16$$
4
GATE PI 2010
MCQ (Single Correct Answer)
+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
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Medical
NEET
Graduate Aptitude Test in Engineering
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Class 12