1
GATE PI 2014
+2
-0.6
A $$80$$ $$mm$$ thick steel plate with $$400$$ $$mm$$ width is rolled to $$40mm$$ thickness in $$4$$ passes with equal reduction in each pass, by using rolls of $$800mm$$ diameter. Assuming the plane-strain deformation, what is the minimum coefficient of friction required for unaided rolling to be possible?
A
$$0.111$$
B
$$0.158$$
C
$$0.223$$
D
$$0.316$$
2
GATE PI 2014
+2
-0.6
The alignment test ''Spindle square with base plate'' is applied to the radial drilling machine. A dial indicator is fixed to the cylindrical spindle and the spindle is rotated to make the indicator touch the base plate at different points. The test inspects whether the
A
Spindle vertical feed axis is perpendicular to the base plate
B
Axis of symmetry of the cylindrical spindle is perpendicular to the base plate.
C
Axis of symmetry, the rotational axis and the vertical feed axis of the spindle are all coincident
D
Spindle rotational axis is perpendicular to the base plate.
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