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

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
Hollow ram is used for indirect extrusion
Redundant work is a function of the die angle

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Chemical Engineering Basics
Which of the following are made out of the carbon steel having carbon content of 0.9 to 1% ?

Small punches, broaches reamers and springs
Cutlery, screws, rivets and files
Mandrels, twist drills, small lathe tools and razors
Forgings like can shaft, structural steel plate, threading dies and drawing dies

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