1
GATE PI 2013
MCQ (Single Correct Answer)
+2
-0.6
Details pertaining to an orthogonal metal cutting process are given below.

Chip thickness ratio $$0.4$$
Under formed thickness $$0.6mm$$
Rake angle $$+ {10^0}$$
Cutting speed $$2.5m/s$$
Mean thickness of primary shear zone $$25microns$$

The shear strain rate in $${s^{ - 1}}$$ during the process is

A
$$0.1781 \times {10^5}$$
B
$$0.7754 \times {10^5}$$
C
$$1.0104 \times {10^5}$$
D
$$4.397 \times {10^5}$$
2
GATE PI 2013
MCQ (Single Correct Answer)
+2
-0.6
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 be economical if the batch size exceeds

A
$$28$$
B
$$32$$
C
$$61$$
D
$$75$$
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 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
$$2500$$
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