1
GATE ME 2014 Set 1
+1
-0.3
For machining a rectangular island represented by coordinates
$$P(0,0), Q(100,0), R(100,50)$$ and $$S(0,50)$$ on a casting using $$CNC$$ milling machine, an end mill with a diameter of $$16$$ $$mm$$ is used. The trajectory of the cutter center to machine the island $$PQRS$$ is
A
$$\left( { - 8, - 8} \right),\,\,\left( {108, - 8} \right),\,\,\left( {105,58} \right),\,\,\left( { - 8,58} \right),\,\,\left( { - 8, - 8} \right)$$
B
$$\left( {8,8} \right),\,\,\left( {94,8} \right),\,\,\left( {94,44} \right),\,\,\left( {8,44} \right),\,\,\left( {8,8} \right)$$
C
$$\left( { - 8,8} \right),\,\,\left( {94,0} \right),\,\,\left( {94,44} \right),\,\,\left( {8,44} \right),\,\,\left( { - 8,8} \right)$$
D
$$\left( {0,0} \right),\,\,\left( {100,0} \right),\,\,\left( {100,50} \right),\,\,\left( {50,0} \right),\,\,\left( {0,0} \right)$$
2
GATE ME 2012
+1
-0.3
A $$CNC$$ vertical milling machine has to cut a straight slot of $$10$$ $$mm$$ width and $$2$$ $$mm$$ depth by a cutter of $$10$$ $$mm$$ diameter between points $$(0, 0)$$ and $$(100, 100)$$ on the $$XY$$ plane (dimensions in $$mm$$). The feed rate used for milling is $$50$$ $$mm/min.$$ Milling time for the slot (in seconds) is
A
$$120$$
B
$$170$$
C
$$180$$
D
$$240$$
3
GATE ME 2008
+1
-0.3
For generating coon's surface we require
A
a set of grid points on the surface
B
a set of grid control points
C
four bounding curves defining the surface
D
two bounding curves and a set of grid control points
4
GATE ME 2007
+1
-0.3
Which type of motor is used in axial or spindle drives of $$CNC$$ m/c tools
A
Induction motors
B
$$DC$$ servomotors
C
Stepper motor
D
Linear servo motor.
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