1. . The addition of carbon in pure iron is chemically called:
(A) Alloying
(B) Deoxidizing
(C) Carburization
(D) None of these
2. . Low carbon steel is also called:
(A) Soft steel
(B) Annealed steel
(C) Tool steel
(D) Mild steel
3. . The maximum ratio of carbon in steel is:
(A) 2%
(B) 1.5%
(C) 0.5%
(D) 1%
4. . The most important element which controls the physical properties of steel is:
(A) Silicon
(B) Manganese
(C) Carbon
(D) Chromium
5. . A steel containing greater than 0.8% carbon is called:
(A) Eutectoid
(B) Hyper Eutectoid
(C) Hypo Eutectoid
(D) None of these
6. . Which one of the following metals cannot be forged:
(A) Wrought iron
(B) Mild steel
(C) High carbon steel
(D) Cast iron