1
GATE PI 2004
MCQ (Single Correct Answer)
+2
-0.6
The extrusion process(es) used for the production of toothpaste tubes is / are

$$1.$$ Tube extrusion
$$2.$$ Forward extrusion
$$3.$$ Impact extrusion

A
$$1$$ only
B
$$1$$ & $$2$$
C
$$2$$ & $$3$$
D
$$3$$ only
2
GATE PI 2004
MCQ (Single Correct Answer)
+2
-0.6
A cylindrical cup of $$48.5$$ $$mm$$ diameter and $$52$$ $$mm$$ height has a corner radius of $$1.5$$ $$mm$$ Cold rolled steel sheet of thickness $$1.5$$ $$mm$$ is used to produce the cup. Assume trim allowance as $$2$$ $$mm$$ per $$25$$ $$mm$$ of cup diameter. What is the blank size in $$mm$$ ?
A
$$102.0$$
B
$$115.4$$
C
$$120.5$$
D
$$128.5$$
3
GATE PI 2004
MCQ (Single Correct Answer)
+2
-0.6
A hole of $$40$$ $$mm$$ diameter is pierced in a steel sheet of $$4$$ $$mm$$ thickness without shear on the tool. Shear strength of steel is $$400$$ $$N/m{m^2},$$ and penetration is $$25\% .$$ What is the expected percentage load reduction if a shear of $$1$$ $$mm$$ is provided on the punch?
A
$$25.00$$
B
$$33.33$$
C
$$50.00$$
D
$$66.67$$
4
GATE PI 2004
MCQ (Single Correct Answer)
+2
-0.6
Determine the load required to punch a $$20$$ $$mm$$ diameter hole in $$2$$ $$mm$$ thick sheet. The properties of the material of the sheet are:
Tensile strength $$-580$$ $$MPa;$$
Yield strength in tension $$-410$$ $$MPa$$
Shear strength $$-350$$ $$MPa;$$
Yield strength in shear $$-250$$ $$MPa$$

The load in $$kN$$ is:

A
$$31.40$$
B
$$43.98$$
C
$$64.40$$
D
$$91.10$$
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