300+ TOP METALLURGY Multiple Choice Questions and Answers

METALLURGY Multiple Choice Questions :-

1. Annealing improves

(A) Grain size

(B) Mechanical properties

(C) Electrical properties

(D) All of above

ANS : D

2. The product from blast furnace is called

(A) Cast Iron

(B) Wrought Iron

(C) Pig Iron

(D) Steel

ANS : C

3. Which is closest to the purest form of the iron?

(A) Cast Iron

(B) Wrought Iron

(C) Pig Iron

(D) Steel

ANS : B

4. Eutectic reaction for iron- carbon system occurs at

(A) 600° C

(B) 723° C

(C) 1147° C

(D) 1490° C

ANS : C

5. The crystal structure of α iron is

(A) Simple Cubic

(B) Face centered cubic

(C) Body centered cubic

(D) Close packed hexagonal

ANS : C

6. Steel can be hardened quickly by the process of

(A) Induction hardening

(B) Nitriding

(C) Cyaniding

(D) Carburizing

ANS : A

7. Materials are softened by

(A) carburising

(B) tempering

(C) normalizing

(D) annealing

ANS : B

8. A peritectic reaction is defined as

(A) two solids reacting to form a liquid

(B) two solids reacting not to form a liquid

(C) a liquid and solid reacting to form another solid

(D) two solids reacting to form a third solid

ANS : C

9. The structures which have the highest packing of atoms are

(A) hexagonal close packed lattice

(B) body central cubic lattice

(C) simple cubic lattice

(D) none of the above

ANS : A

10. Which of the following metal has lowest melting point?

(A) Antimony

(B) Tin

(C) Silver

(D) Zinc

ANS : B

11. Metal with hexagonal close packed structure is

(A) silver

(B) Iron

(C) Magnesium

(D) Aluminium

ANS : C

12. Austempering is the heat treatment process used to obtain greater

(A) hardness

(B) toughness

(C) brittleness

(D) ductility

ANS : B

13. wt.% of carbon in mild steels

(A) <0.008

(B) 0.008-0.3

(C) 0.3-0.8

(D) 0.8-2.11

ANS : B

14. Eutectoid product in Fe-C system is called

(A) Pearlite

(B) Bainite

(C) Ledeburite

(D) Spheroidite

ANS : A

15. Stainless steel is so called because of its ______.

(A) High strength

(B) High corrosion resistance

(C) High ductility

(D) Brittleness

ANS : B

16. The percentage of carbon in gray cast iron is in the range of

(A) 0.25 to 0.75 %

(B) 1.25 to 1.75 %

(C) 3 to 4%

(D) 8 to 10 %

ANS : C

METALLURGY Multiple Choice Questions with Answers Pdf Download ::