1
GATE ME 2001
MCQ (Single Correct Answer)
+2
-0.6
During orthogonal cutting of mild steel with a $$10$$ degrees rake angle tool the chip thickness ratio was obtained as $$0.4.$$ The shear angle (in degrees) evaluated from this data is
A
$$6.53$$
B
$$20.22$$
C
$$22.94$$
D
$$50.00$$
2
GATE ME 2001
MCQ (Single Correct Answer)
+2
-0.6
For turning $$NiCr$$ alloy steel at cutting speeds of $$64m/min$$ and $$100m/min,$$ the respective tool lives are $$15min$$ and $$12$$ $$min.$$ The tool life for a cutting speed of $$144m/min$$ is
A
$$8$$ min
B
$$9$$ min
C
$$10$$ min
D
$$11.5$$ min
3
GATE ME 2001
MCQ (Single Correct Answer)
+5
-1.5
Tool life testing on a lathe under dry cutting conditions gave $$'n'$$ and $$'C'$$ of Taylor tool life equation as $$0.12$$ and $$130$$ $$m/min,$$ respectively. When a coolant was used, $$'C'$$ increased by $$10\% $$. The increased tool life with the use of coolant at a cutting speed of $$90$$ $$m/min$$ is
A
$$47.4min$$
B
$$37.4min$$
C
$$27.4min$$
D
$$17.4min$$
4
GATE ME 2001
Subjective
+5
-0
Identical straight turning operation was carried out using two tools : $$8 - 8 - 5 - 5 - 5 - 25 - 0\,(ASA)$$ and $$8-8-5-5-7-30-0(ASA)$$. For same feed the tool which gives better surface finish is
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