1
GATE PI 1992
MCQ (Single Correct Answer)
+1
-0.3
Thread rolling is restricted to
A
ferrous materials
B
ductile materials
C
hard materials
D
none of the above
2
GATE PI 1991
Fill in the Blanks
+1
-0
Seamless long steel tubes are manufactured by rolling, drawing and .............
3
GATE PI 1991
Fill in the Blanks
+1
-0
At $${1000^ \circ }C$$ the crystallographic structure of iron is ....................
4
GATE PI 1990
MCQ (Single Correct Answer)
+1
-0.3
Semi brittle materials can be extruded by
A
impact extrusion
B
closed cavity extrusion
C
hydrostatic extrusion
D
backward extrusion
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