1
GATE PI 2003
MCQ (Single Correct Answer)
+2
-0.6
Tool life equation for two tools under consideration are as follows

$$\eqalign{ & HSS:\,\,\,\,\,\,\,\,\,\,\,\,\,V{T^{0.2}} = 150 \cr & Carbide:\,\,\,\,\,\,V{T^{0.3}} = 250 \cr} $$
Where $$V$$ is the cutting speed in $$m/min$$ and $$T$$ is the tool life in $$min.$$ The breakdown cutting speed above which the carbide tool will be beneficial is

A
$$54$$ $$m/min$$
B
$$150$$ $$m/min$$
C
$$194$$ $$m/min$$
D
$$250$$ $$m/min$$
2
GATE PI 2002
MCQ (Single Correct Answer)
+2
-0.6
Two different tools $$A$$ and $$B$$ having nose radius of $$0.6mm$$ and $$0.33mm$$ respectively are used to machine $$C-45$$ steel employing feed rate of $$0.2$$ $$mm/rev$$ and $$0.1mm/rev$$ respectively. The tool that gives better finish and the value of ideal surface roughness are
A
Tool $$A$$ and $$4.166$$ $$\mu m$$ respectively
B
Tool $$B$$ and $$3.78$$ $$\mu m$$ respectively
C
Tool $$A$$ and $$8.333$$ $$\mu m$$ respectively
D
Tool $$B$$ and $$8.333$$ $$\mu m$$ respectively
3
GATE PI 1995
MCQ (Single Correct Answer)
+2
-0.6
A $$60deg$$ symmetrical $$V$$ tool is used in shaping a work piece with a depth of cut of $$0.1$$$$mm$$ and feed of $$0.1mm/stroke$$. The theoretical peak to valley height, in $$mm,$$ of the surface produced is
A
$$0.043$$
B
$$0.067$$
C
$$0.086$$
D
none
4
GATE PI 1994
MCQ (Single Correct Answer)
+2
-0.6
The heat generated in metal cutting is dissipated in different proportions into environment, tool, chip and work-piece. The correct order of this proportion in decreasing magnitude is (no cutting fluid is use ($$d$$)
A
tool, work, chip, environment
B
work, tool, chip, environment
C
tool, chip, environment, work
D
chip, tool, work, environment
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