1
GATE PI 2017
+2
-0.6
The Merchant circle diagram showing various forces associated with a cutting process using a wedge shaped tool is given in the Figure

The coefficient of friction can be estimated from the ratio

A
$${{{f_1}} \over {{f_2}}}$$
B
$${{{f_3}} \over {{f_4}}}$$
C
$${{{f_5}} \over {{f_6}}}$$
D
$${{{f_6}} \over {{f_5}}}$$
2
GATE PI 2017
+1
-0.3
Turning, drilling, boring and milling are commonly used machining operations. Among these, the operation (s) performed by a single point cutting tool is (are)
A
turning only
B
drilling and milling only
C
turning and boring only
D
boring only
3
GATE PI 2017
+2
-0.6
A schematic diagram of peripheral milling is shown in the Figure.

If $$t$$ is the depth of cut and $$d$$ is the diameter of the milling cutter, then the length of approach $$\left( {la} \right)$$ is expressed as

A
$$\sqrt {d\left( {t - d} \right)}$$
B
$$\sqrt {d\left( {d - t} \right)}$$
C
$$\sqrt {t\left( {d - t} \right)}$$
D
$$\sqrt {t\left( {t - d} \right)}$$
4
GATE PI 2017
+2
-0.6
The preparatory and miscellaneous codes used in $$CNC$$ part programming and the functions are given in the Table

The correct combination of code and the respective function is

A
$$P - 4,\,\,Q - 1,\,\,R - 3,\,\,S - 2$$
B
$$P - 4,\,\,Q - 1,\,\,R - 2,\,\,S - 3$$
C
$$P - 1,\,\,Q - 4,\,\,R - 3,\,\,S - 2$$
D
$$P - 2,\,\,Q - 1,\,\,R - 3,\,\,S - 4$$
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