1
GATE PI 2007
MCQ (Single Correct Answer)
+2
-0.6
Circular blanks of $$35$$ $$mm$$ diameter are punched from a steel sheet of $$2$$ $$mm$$ thickness. If the clearance per side between the punch and die is to be kept as $$40$$ microns, the sizes of punch and die should respectively be.
A
$$35$$ & $$35.040$$
B
$$34.92$$ & $$35$$
C
$$35$$ & $$35.080$$
D
$$35.040$$ & $$34.92$$
2
GATE PI 2006
MCQ (Single Correct Answer)
+2
-0.6
A cup is to be drawn to a diameter of $$70mm$$ with $$35mm$$ depth from a $$0.5mm$$ thick sheet metal. The cup is drawn in one operation. Assume $${\sigma _u} = 430\,\,MPa.$$

The required blank diameter is

A
$$86.7mm$$
B
$$119.5mm$$
C
$$121.24mm$$
D
$$169mm$$
3
GATE PI 2006
MCQ (Single Correct Answer)
+2
-0.6
A cup is to be drawn to a diameter of $$70mm$$ with $$35mm$$ depth from a $$0.5mm$$ thick sheet metal. The cup is drawn in one operation. Assume $${\sigma _u} = 430\,\,MPa.$$

The maximum drawing force is

A
$$0.047MN$$
B
$$0.82MN$$
C
$$0.83MN$$
D
$$9.69MN$$
4
GATE PI 2006
MCQ (Single Correct Answer)
+2
-0.6
It is required to punch a hole of diameter $$10mm$$ on a sheet of thickness $$3mm.$$ The shear strength of the work material is $$420Mpa.$$ The required punch force is
A
$$19.78$$ $$kN$$
B
$$39.56$$ $$kN$$
C
$$98.9$$ $$kN$$
D
$$395.6$$ $$kN$$
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