MCQOPTIONS
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				| 1. | 
                                    In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal is called: | 
                            
| A. | friction zone | 
| B. | work tool contact zone | 
| C. | shear zone | 
| D. | none of the mentioned | 
| Answer» D. none of the mentioned | |