1
GATE ME 2009
MCQ (Single Correct Answer)
+1
-0.3
Friction at the tool - chip interface can be reduced by
A
Decreasing the rake angle
B
Increasing the depth of cut
C
Decreasing the cutting speed
D
Increasing the cutting speed
2
GATE ME 2009
MCQ (Single Correct Answer)
+2
-0.6
In a machining experiment, tool life was found to vary with the cutting speed in the following manner GATE ME 2009 Production Engineering - Metal Cutting Question 47 English

The exponent $$(n)$$ and constant $$(K)$$ of the Taylor's tool life equation are

A
$$n=0.5,$$ and $$K=540$$
B
$$n=1.0,$$ and $$K=4860$$
C
$$n=-1.0,$$ and $$K=0.74$$
D
$$n=-0.5,$$ and $$K=1.155$$
3
GATE ME 2009
MCQ (Single Correct Answer)
+2
-0.6
In a machining experiment, tool life was found to vary with the cutting speed in the following manner GATE ME 2009 Production Engineering - Metal Cutting Question 46 English

What is percentage increase in tool life when the cutting speed is halved.

A
$$50\% $$
B
$$200\% $$
C
$$300\% $$
D
$$400\% $$
4
GATE ME 2009
MCQ (Single Correct Answer)
+2
-0.6
What are the upper and lower limits of the shaft represented by $$60{f_8}$$?

Use the following data:
Diameter $$60$$ lies in the diameter step of $$50-80$$ $$mm$$
Fundamental tolerance unit, $$i,$$ in $$\mu m = 0.45\,\,{D^{1/3}} + 0.001D,$$
where $$D$$ is the representative size in $$mm;$$ Tolerance value for $${\rm I}T8 = 25i,$$ Fundamental deviation for $$'‘f’'$$ shaft $$ = - 5.5{D^{0.41}}$$

A
Lower limit $$= 59.924mm,$$ Upper Limit $$= 59.970mm$$
B
Lower limit $$= 59.954mm,$$ Upper Limit $$= 60.000mm$$
C
Lower limit $$= 59.970mm,$$ Upper Limit $$= 60.016mm$$
D
Lower limit $$= 60.000mm,$$ Upper Limit $$= 60.046mm$$
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