1
GATE PI 1993
MCQ (Single Correct Answer)
+2
-0.6
In a cutting test with $$0.3mm$$ flank wear as tool failure criterion, a tool life of $$10min$$ was obtained at a cutting velocity of $$20m/min.$$ Taking tool life exponrent as $$0.25,$$ the tool life in minutes at $$40m/min$$ of cutting velocity will be
A
$$0.506$$
B
$$0.625$$
C
$$3.140$$
D
$$5.002$$
2
GATE PI 1990
MCQ (Single Correct Answer)
+2
-0.6
A single point cutting tool with $${12^0}$$ rake angle is used for orthogonal machining of a ductile material. The shear plane angle for the theoretically minimum possible shear strain to occur
A
$$51$$
B
$$45$$
C
$$30$$
D
none
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