In $$TIG$$ welding a ...........A. .......... and ..........B.......... electrode is used.

A. non-consumable / consumable
B. coated / bare

A single point cutting tool with $${12^0}$$ rake angle is used for orthogonal machining of a ductile material. The shear plane angle for the theoretically minimum possible shear strain to occur

$$A\,\,2{1 \over 2}\,\,$$ control in a typical $$CNC$$ machine provides

Use of a robot for spray painting is primarily justified for improved.... ....... .... A ...... and reduced......... B....................

A. productivity / consistency
B. cost / hazard