A.In the involute system, the pressure angle is constant, from commencement to end of engagement
B.The straight teeth of the basic rank for the involute profile admits of simple tools
C.The profile for the flank and face is a single curve in the involute system
D.The vriation in the centre distance with in limits does not affect the two mating gears in the involute system
E.The interference is inherently absent in this system