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

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

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Chemical Engineering Basics
Maraging steels derive their strength from the following mechanism:

Fine dispersions of Fe₃ C nucleated on dislocations in austenite
A fine, highly dislocated and strong martensite
Fine dispersions of alloy carbides in a ferrite matrix
Fine dispersions of intermetallics of Fe, Ni, Ti etc

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