Manufacturing And Production Technology
In metal machining, the work-tool contact zone is a zone where heat is generated due to

Plastic deformation of metal
Friction between the moving chip and the tool face
None of these
Burnishing friction

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Manufacturing And Production Technology
During normalizing process of steel, the specimen is heated

Between the upper and lower critical temperature and cooled in still air.
Above the upper critical temperature and cooled in furnace.
Above the upper critical temperature and cooled in still air.
Between the upper and lower critical temperature and cooled in furnace.

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