The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding _______________ grinding wheel is normally used ?

(A) Hard (X)
(B) Soft (X)
(C) Silicon carbide (X)
(D) Aluminium oxide ()

Answers: The softness or hardness of a grinding wheel depends upon the type & amount of bonding material  used for general purpose cutter grinding Aluminium oxide grinding wheel is normally used.