1
GATE PI 2005
+2
-0.6
A $$\phi$$ $$40$$ $$mm$$ job is subjected to orthogonal turning by a $$+ {10^ \circ }$$ rake angle tool at $$500$$ $$rev/min.$$ By direct measurement during the cutting operation, the shear angle was found equal to $${25^ \circ }.$$

The velocity (in $$m/min$$) with which the chip flows on the tool face is

A
$$32$$
B
$$63$$
C
$$22$$
D
$$27.5$$
2
GATE PI 2005
+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 $$=0.2mm/rev.$$

The shear angle is

A
$${14^ \circ }$$
B
$${25^ \circ }$$
C
$${29^ \circ }$$
D
$${75^ \circ }$$
3
GATE PI 2005
+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
$$635.84$$
4
GATE PI 2005
+1
-0.3
Tool life in the case of a grinding wheel is the time
A
between two successive regrinds of the wheel
B
taken for the wheel to be balanced
C
taken between two successive wheel dressings
D
taken for a wear of $$1$$ $$mm$$ on its diameter
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