1
GATE PI 2003
+1
-0.3
A
$$P - 3,\,\,Q - 1,\,\,R - 2$$
B
$$P - 1,\,\,Q - 2,\,\,R - 4$$
C
$$P - 4,\,\,Q - 3,\,\,R - 3$$
D
$$P - 2,\,\,Q - 4,\,\,R - 1$$
2
GATE PI 2003
+2
-0.6
A hydraulic press is used to produce circular blanks of $$10$$ $$mm$$ diameter from a sheet of $$2$$ $$mm$$ thickness. If the shear strength of the sheet material is $$400$$ $$N/m{m^2},$$ the force required for producing a circular blank is
A
$$8$$ $$kN$$
B
$$25.13$$ $$kN$$
C
$$31.42$$ $$kN$$
D
$$125.66$$ $$kN$$
3
GATE PI 2003
+2
-0.6
Consider the following statements related piercing and blanking
$$1.$$ Shear on the punch reduces the maximum cutting force
$$2.$$ Shear increases the capacity of the press needed
$$3.$$ Shear increases the life of the punch
$$4.$$ Total energy needed to make the cut remains unaltered due to provision of shear

Which of the above statements are correct

A
$$1$$ & $$2$$
B
$$1$$ & $$4$$
C
$$2$$ & $$3$$
D
$$3$$ & $$4$$
4
GATE PI 2003
+1
-0.3
A
$$P - 2,\,\,Q - 3,\,\,R - 1$$
B
$$P - 3,\,\,Q - 1,\,\,R - 2$$
C
$$P - 1,\,\,Q - 2,\,\,R - 3$$
D
$$P - 2,\,\,Q - 1,\,\,R - 3$$
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