MCQOPTIONS
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| 1. |
*$_Cobalt in steel? |
| A. | Improves wear resistance, cutting ability and toughness |
| B. | Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties |
| C. | Improves cutting ability and reduce hardenability |
| D. | Gives ductility, toughness, tensile strength and anti corrosion property |
| Answer» D. Gives ductility, toughness, tensile strength and anti corrosion property | |