1
GATE ME 2006
MCQ (Single Correct Answer)
+2
-0.6
In an orthogonal machining operation:
$$\,\,\,\,\,\,\,\,\,\,$$Uncut thickness $$\,\,\,\,\,$$ $$= 0.5$$ $$mm$$
$$\,\,\,\,\,\,\,\,\,\,$$Cutting speed $$\,\,\,\,\,\,\,\,\,\,$$ $$= 20$$ $$m/min$$
$$\,\,\,\,\,\,\,\,\,\,$$Width of cut $$\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$= 5$$ $$mm$$
$$\,\,\,\,\,\,\,\,\,\,$$Chip thickness $$\,\,\,\,\,\,\,\,$$ $$= 0.7$$ $$mm$$
$$\,\,\,\,\,\,\,\,\,\,$$Thrust force$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$= 200$$ $$N$$
$$\,\,\,\,\,\,\,\,\,\,$$Cutting force $$\,\,\,\,\,\,\,\,\,\,\,\,$$ $$= 1200$$ $$N$$
$$\,\,\,\,\,\,\,\,\,\,$$Rake angle $$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$ = {15^ \circ }$$
Assume Merchant’s theory

The percentage of total energy dissipated due to friction at the tool chip interface is

A
$$30\% $$
B
$$42\% $$
C
$$58\% $$
D
$$70\% $$
2
GATE ME 2005
MCQ (Single Correct Answer)
+2
-0.6
The figure below shows a graph, which qualitatively relates cutting speed and cost per piece produced. GATE ME 2005 Production Engineering - Metal Cutting Question 60 English

The three curves $$1,2$$ and $$3$$ respectively represent

A
Machining cost, non-productive cost, tool changing cost
B
Non-productive cost, machining cost, tool changing cost
C
Tool changing cost, machining cost, non-productive cost
D
Tool changing cost, non-productive cost, machining cost
3
GATE ME 2005
MCQ (Single Correct Answer)
+2
-0.6
Two tools $$P$$ and $$Q$$ have signature $${5^ \circ } - {5^ \circ } - {6^ \circ } - {6^ \circ } - {8^ \circ } - {30^ \circ } - 0$$ and $${5^ \circ } - {5^ \circ } - {7^ \circ } - {7^ \circ } - {8^ \circ } - {15^ \circ } - 0$$ (both $$ASA$$) respectively. They are used to turn components under the same machining conditions. If $${h_p}$$ and $${h_Q}$$ denote the peak-to-valley height of surfaces produced by the tools $$P$$ and $$Q$$, the ratio $${h_P}/{h_Q}$$ will be
A
GATE ME 2005 Production Engineering - Metal Cutting Question 59 English Option 1
B
GATE ME 2005 Production Engineering - Metal Cutting Question 59 English Option 2
C
GATE ME 2005 Production Engineering - Metal Cutting Question 59 English Option 3
D
GATE ME 2005 Production Engineering - Metal Cutting Question 59 English Option 4
4
GATE ME 2004
MCQ (Single Correct Answer)
+2
-0.6
In a machining operation, doubling the cutting speed reduces the tool life to $$1/{8^{th}}$$ of the original value. The exponent $$n$$ in Taylor's tool life equation $$V{T^n} = C,$$ is
A
$$1/8$$
B
$$1/4$$
C
$$1/3$$
D
$$1/2$$
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Turbo Machinery
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