The skid in a stylus type roughness measuring instrument is used to provide ............ A .............. and define ................... B .............. geometrical profile of the surface.

$$A.$$ support / datum
$$B.$$ micro / macro

Powder metallurgical components have

$$A$$ $$30$$ $$mm$$ hole shaft assembly results in minimum and maximum clearances of $$0.03$$ $$mm$$ and $$0.30$$ $$mm$$ respectively. The hole has a unilateral tolerance with zero fundamental deviation. If the tolerance on the shaft is $$0.08$$ $$mm,$$ the maximum size of the hole is

To obtain dimension of $$61.18$$ $$mm$$ using slip gages, the most appropriate combination is