1
GATE PI 2015
MCQ (Single Correct Answer)
+1
-0.3
During turning of mild steel work material, the maximum temperature is observed at
A
Primary deformation zone
B
Tool and chip interface
C
Tool-flank and work interface
D
Machined sub-surface
2
GATE PI 2015
MCQ (Single Correct Answer)
+1
-0.3
The angle of a twist drill that determines its rake angle is
A
Lip relief angle
B
Chisel edge angle
C
Helix angle
D
Point angle
3
GATE PI 2014
MCQ (Single Correct Answer)
+1
-0.3
A spindle speed of $$300$$ $$rpm$$ and a feed $$0.3mm/revolution$$ are chosen for longitudinal turning operation on an engine lathe. In finishing pass, roughness on the work surface can be reduced by
A
reducing the spindle speed
B
increasing the spindle speed
C
reducing the feed of tool
D
increasing the feed of tool
4
GATE PI 2009
MCQ (Single Correct Answer)
+1
-0.3
Diamond cutting tools are not recommended for machining of ferrous metals due to
A
High tool hardness
B
High thermal conductivity of the work material
C
Poor tool roughness
D
Chemical affinity of tool material with iron
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