For full depth of involute spur gears, minimum number of teeth of pinion to avoid interference depends upon

In the design of shafts made of ductile materials subjected to twisting moment and bending moment, the recommended theory of failure is

In an engineering drawing one finds the designation of $$20G7F8.$$ The position of tolerance of the hole is indicated by

In twist drills ......... (small/large) point angle and ........ (small/large) helix angle are provided for drilling soft, low strength steel.