Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of_____________________?

(A) 90% tungsten carbide and 10% cobalt ()
(B) 70% aluminium oxide & 30% silica (X)
(C) 30% nickel, 15% chromium & 55% tungsten (X)
(D) 65% tungsten & 35% zirconium (X)

Answers: Carbide tipped cutting tools are  manufactured by powder metallurgy techniques and have a composition of 90% tungsten carbide and 10% cobalt.