1
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
2
GATE ME 2000
MCQ (Single Correct Answer)
+2
-0.6
A conventional lathe and a $$CNC$$ lathe are under consideration for machining a given part. The relevant data are shown below : GATE ME 2000 Production Engineering - Metal Cutting Question 65 English

The machine preferred for producing $$100$$ pieces is

A
Conventional lathe
B
$$CNC$$ lathe
C
Any of the above
D
None
3
GATE ME 1999
MCQ (Single Correct Answer)
+2
-0.6
What is the approximate $$\% $$ change in the life, $$t,$$ of the tool with zero rake angle used in orthogonal cutting when its clearance angle, $$\alpha ,$$ is changed from $$10$$ to $$7$$ deg?

(Hint: flank wear rate is proportional to $$\cot \,\alpha $$)

A
$$30\% $$ increase
B
$$30\% $$ decrease
C
$$70\% $$ increase
D
$$70\% $$ decrease
4
GATE ME 1998
MCQ (Single Correct Answer)
+2
-0.6
In orthogonal machining operation, the chip thickness and the uncut chip thickness are equal to $$0.45mm$$. If the tool rake angle is $$0$$ deg. The shear plane angle is
A
$$45$$
B
$$30$$
C
$$18$$
D
$$60$$
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Turbo Machinery
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Graduate Aptitude Test in Engineering
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