1
GATE PI 1991
MCQ (Single Correct Answer)
+1
-0.3
Feed motion can be provided with stepper motors in $$CNC$$
A
lathe
B
drilling machine
C
milling machine
D
grinding machine
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 1991
MCQ (Single Correct Answer)
+1
-0.3
In progressive die (for sheet metal), spring loaded stripper plate is used to clamps the stock until:
A
The punch penetrates twice the stock thickness
B
It removes wrinkles on the product edges
C
Automatic feeder plate releases it
D
Punch is completely withdrawn from the stock
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