Engineering Materials
The temperature required for full annealing in hypereutectoid steel is

30° C to 50° C above lower critical temperature
30° C to 50° C below lower critical temperature
30° C to 50° C below upper critical temperature
30° C to 50° C above upper critical temperature

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Engineering Materials
The brown smoke during the operation of a Bessemer converter indicates that the

The brown smoke does not occur during the operation of a Bessemer converter
Air is burning out silicon and manganese
The converter must be titled to remove the contents of the converter
Silicon and manganese has burnt and carbon has started oxidizing

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Engineering Materials
Stress relaxation is the phenomenon

Stress reduces on increasing load
In which stress remains constant on increasing load
In which deformation tends to loosen the joint and produces a stress reduced
In which parts are not loaded

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