1
GATE PI 2008
+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
B
C
D
2
GATE PI 2008
+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
$$280$$
3
GATE PI 2008
+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
4
GATE PI 2008
+2
-0.6
By application of tensile force, the cross sectional area of bar $$' P '$$ is first reduced by $$30\%$$ and then by an additional $$20\%$$. Another bar $$'Q'$$ of the same material is reduced in cross sectional area by $$50\%$$ in a single step by applying tensile force. After deformation, the true strain in bar $$'P'$$ and bar $$'Q'$$ will, respectively, be
A
$$0.5$$ and $$0.5$$
B
$$0.58$$ and $$0.69$$
C
$$0.69$$ and $$0.69$$
D
$$0.78$$ and $$1.00$$
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