Chemical Engineering Basics
The stress at which a metal fails by fatigue lies

Near the fracture point of the stress-strain curve
In the plastic range
None of these
In the elastic range

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Chemical Engineering Basics
In extrusion of metals, which of the following statement is true ?

Hollow ram is used for indirect extrusion
Redundant work is a function of the die angle
Relative motion between the billet surface and the container wall is always present
Speed of the extruded material is same as that of ram speed

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