7000+ Mechanical Metallurgy Multiple Choice Questions and Answers - 1

Question: 1

With increase in percentage of soluble impurities in metal, its recyrstallisation temperature

(A) Increases

(B) Decreases

(C) Remains same

(D) May increase or decrease, depends on the type of metal

Question: 2

In cold working of steel

(A) Internal stresses disappear

(B) It is heated below recyrstallisation temperature

(C) Grain structure does not change

(D) Strength and hardness increases

Question: 3

Surface finish of hot worked metals is not as good as good as cold worked metal mainly because of

(A) Oxidation and scaling

(B) Work hardening

(C) Higher internal stresses

(D) Lower internal stresses

Question: 4

Peening is related to

(A) Mechanical working of metals by hammer blow

(B) Sheet metal process

(C) Wire drawing process

(D) Extrusion process

Question: 5

Compression test is mostly used for the _____ materials.

(A) Brittle

(B) Hard

(C) Ductile

(D) None of these