1
GATE PI 2008
MCQ (Single Correct Answer)
+2
-0.6
In a $$CNC$$ feed drive, a stepper motor with step angle of $$1.8deg$$ drives a lead screw with pitch of $$2mm.$$ The basic length unit $$(BLU)$$ for this drive is
A
$$10$$ microns
B
$$20$$ microns
C
$$40$$ microns
D
$$100$$ microns
2
GATE PI 2008
MCQ (Single Correct Answer)
+2
-0.6
Suppose point $$P1$$ in $$APT$$ (Automatically programmed Tool) programming is coded by statement
$$P1 = POINT/XSMALL,\,\,\,INTOF,\,\,\,LN1,\,\,CR1$$

The coded geometric situation without causing error is

A
GATE PI 2008 Machine Tools and Machining - Advance Machine Tools Question 12 English Option 1
B
GATE PI 2008 Machine Tools and Machining - Advance Machine Tools Question 12 English Option 2
C
GATE PI 2008 Machine Tools and Machining - Advance Machine Tools Question 12 English Option 3
D
GATE PI 2008 Machine Tools and Machining - Advance Machine Tools Question 12 English Option 4
3
GATE PI 2008
MCQ (Single Correct Answer)
+2
-0.6
A stepper motor has $$150$$ steps. The output shaft of the motor is directly coupled to a lead screw of pitch $$4mm,$$ which drives a table. If the frequency of pulse supply to the motor is $$200Hz$$, the speed of the table (in $$mm/min)$$ is
A
$$400$$
B
$$320$$
C
$$300$$
D
$$280$$
4
GATE PI 2007
MCQ (Single Correct Answer)
+2
-0.6
The geometric transformation specified by

$$\left[ {x'\,\,y'\,\,1} \right] = \left[ {x\,\,y\,\,1} \right]\left[ {\matrix{ {0.5} & 0 & 0 \cr 0 & {0.25} & 0 \cr 1 & 2 & 1 \cr } } \right]$$ in a $$2D.$$
In a $$2D$$ $$CAD$$ system represents................

A
Scaling and translation
B
Scaling and rotation
C
rotation and translation
D
rotation
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