1
GATE PI 2005
MCQ (Single Correct Answer)
+2
-0.6
A batch of $$500$$ jobs of diameter $$50$$ $$mm$$ and length $$100$$ $$mm$$ is to be turned at $$200$$ $$rev/min$$ and feed $$0.2$$ $$mm/rev.$$

Applying Taylor's equation $$V{T^{0.25}} = 160,$$ the tool life in minutes is

A
$$20.36$$
B
$$22.43$$
C
$$674$$
D
$$28.20$$
2
GATE PI 2005
MCQ (Single Correct Answer)
+2
-0.6
The following data relate to an orthogonal turning process:
$$\,\,\,\,\,\,\,\,\,\,\,$$Back rake angle $$=15deg,$$
$$\,\,\,\,\,\,\,\,\,\,\,$$Width of cut $$=2mm,$$
$$\,\,\,\,\,\,\,\,\,\,\,$$Chip thickness $$=0.4mm,$$
$$\,\,\,\,\,\,\,\,\,\,\,$$Feed rate $$=0.2mm/rev.$$

If the cutting force and the thrust force are $$900N$$ and $$810N,$$ the mean strength in $$Mpa$$

A
$$137.94$$
B
$$477.91$$
C
$$500.58$$
D
$$635.84$$
3
GATE PI 2005
MCQ (Single Correct Answer)
+1
-0.3
If each abrasive grain is viewed as a cutting tool, then which of the following represents the cutting parameters in common grinding operations?
A
Large negative rake angle, low shear angle and high cutting speed
B
Large positive rake angle, low shear angle and high cutting speed
C
Large negative rake angle, high shear angle and low cutting speed
D
Zero negative rake angle, high shear angle and high cutting speed
4
GATE PI 2005
MCQ (Single Correct Answer)
+2
-0.6
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 strain?
A
$$0.31$$
B
$$0.13$$
C
$$3.00$$
D
$$3.34$$