1
GATE PI 1989
Fill in the Blanks
+1
-0
At the last hammer stroke the excess material from the finishing cavity of a forging die is pushed into .............
2
GATE PI 1989
Subjective
+5
-0
In a wire drawing operation diameter of $$6mm$$ is reduced in stages to a diameter of $$1.34mm.$$ Assuming ideally rigid plastic material and ideally lubricant condition,
$$i)$$$$\,\,\,\,\,\,\,$$ The minimum number of passes required by assuming max reduction per pass
$$\,\,\,\,\,\,\,\,\,\,\,\,$$ is obtained with $$\mu = 0.2$$ and half die angle as $${6^0}$$. If the flow strength of the
$$\,\,\,\,\,\,\,\,\,\,\,\,$$ material is $$60$$ $$MPa.$$

$$ii)$$$$\,\,\,\,\,$$ The diameter of wire after $${2^{nd}}$$ stage

3
GATE PI 1989
+1
-0.3
Flatness of slip gages is checked with
A
Interferometer
B
Optical flat
C
Electronic comparator
D
Linear measuring machine
4
GATE PI 1989
+2
-0.6
Outside diameter of bush is turned using a mandrel. The mandrel diameter is maintained as $${30^{\matrix{ { + 0.000} \cr { - 0.050} \cr } }}\,\,mm$$ and the bore diameter is $${30^{\matrix{ { + 0.050} \cr { - 0.000} \cr } }}\,\,mm$$. The maximum value in $$mm$$ of the eccentricity on the bush due to the locating mandrel
A
$$0.050$$
B
$$0.100$$
C
$$0.020$$
D
$$0.025$$
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