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

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

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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% ?

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

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