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
Redundant work is a function of the die angle
Hollow ram is used for indirect extrusion
Speed of the extruded material is same as that of ram speed

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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% ?

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

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