Engineering Materials Objective Questions with Answers - Set 19 - ObjectiveBooks

Engineering Materials Objective Questions with Answers - Set 19

Practice Test: Question Set - 19

1. By severely deforming a metal in a particular direction it becomes
    (A) Ductile
    (B) Malleable
    (C) Homogeneous
    (D) Anisotropic

2. Solder is an alloy consisting of
    (A) Tin, antimony, copper
    (B) Tin and copper
    (C) Tin and lead
    (D) Lead and zinc

3. Iron ore is usually found in the form of
    (A) Oxides
    (B) Carbonates
    (C) Sulphides
    (D) All of these

4. Cyaniding is the process of
    (A) Dipping steel in cyanide bath
    (B) Reacting steel surface with cyanide salts
    (C) Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness
    (D) Obtaining cyanide salts

5. Shock resistance of steel is increased by adding
    (A) Nickel
    (B) Chromium
    (C) Nickel and chromium
    (D) Sulphur, lead and phosphorus

6. Induction hardening is the process of
    (A) Hardening surface of work-piece to obtain hard and wear resistant surface
    (B) Heating and cooling rapidly
    (C) Increasing hardness throughout
    (D) Inducing hardness by continuous process

7. The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as
    (A) Hysteresis
    (B) Creep
    (C) Visco elasticity
    (D) Boeschinger effect

8. Process of Austempering results in
    (A) Formation of bainite structure
    (B) Carburised structure
    (C) Martenistic structure
    (D) Lamellar layers of carbide distributed throughout the structure

9. Hardness of martensite is about
    (A) RC 65
    (B) RC 48
    (C) RC 57
    (D) RC 80

10. Ball bearings are, usually, made from
    (A) Low carbon steel
    (B) High carbon steel
    (C) Medium carbon steel
    (D) Chrome steel

11. Weld decay is the phenomenon found with
    (A) Cast iron
    (B) Mild steel
    (C) Nonferrous materials
    (D) Stainless steel

12. Hardness of upper bainite (acicular structure) is about
    (A) RC 65
    (B) RC 48
    (C) RC 57
    (D) RC 80

13. Carbon in iron is an example of
    (A) Substitutional solution
    (B) Interstitial solid solution
    (C) Intermetallic compounds
    (D) All of the above

14. Argentite is the principal ore or raw material for
    (A) Aluminium
    (B) Tin
    (C) Zinc
    (D) Silver

15. Nimonic contains __________ percentage of nickel as that of Inconel.
    (A) Same
    (B) Less
    (C) More
    (D) None of these

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