Minimum dimensional and form accuracy can be obtained in the cylinder bores of automobile engines if the bores are finished by

Appropriate instrument to check the flatness of slip gage is

In $$NC$$ part programming spindle speed of $$730rpm$$ will be coded by the magic - $$3$$ rule as

An elastic body is subjected to a tensile stress $$X$$ in a particular direction and a compressive stress $$Y$$ in its perpendicular direction. $$X$$ and $$Y$$ are unequal in magnitude. On the plane of maximum shear stress in the body there will be: