1
GATE PI 2005
+2
-0.6
Consider the following statements:
In comparison to hot working, in cold working,
$$1.$$ Higher forces are required
$$2.$$ No heating is required
$$3.$$ Less ductility is required
$$4.$$ Better surface finish is obtained.

Which of the statements given above are correct?

A
$$1,$$ $$2$$ and $$3$$
B
$$1,$$ $$2$$ and $$4$$
C
$$1$$ and $$3$$
D
$$2,$$ $$3$$ and $$4$$
2
GATE PI 2005
+2
-0.6
A $$\phi \,\,25$$ $$mm$$ hole is pierced in a $$t=2.5mm$$ thick steel sheet having shear strength $$\tau = 350\,\,MPa.$$ If the diametral clearance is given by the expression $$C=0.0064$$ $$t$$ $$\sqrt \tau ,$$ the die diameter (in $$mm$$), punch diameter (in $$mm$$) and punch force in $$(kN)$$ respectively are
A
$$25.0, 25.3, 171.8$$
B
$$25.0, 24.7, 68.75$$
C
$$24.7, 25.0, 171.8$$
D
$$25.3, 25.0, 68.75$$
3
GATE PI 2005
+1
-0.3
Ring gage is used to measure
A
outside diameter but not roundness
B
roundness but not outside diameter
C
both outside diameter and roundness
D
4
GATE PI 2005
+2
-0.6
A cylindrical pin of diameter $${1.996^{\matrix{ { + 0.0015} \cr { - 0.0015} \cr } }}\,\,mm$$ is assembled into a hole of diameter $${2.000^{\matrix{ { + 0.0015} \cr { - 0.0015} \cr } }}\,\,mm.$$ The allowance (in $$mm$$) provided for this assembly is
A
$$0.001$$
B
$$0.015$$
C
$$0.025$$
D
$$0.035$$
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