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Engineering Materials
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Engineering Materials Practice Set-7

May 15, 2021

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Page 1 of 4

1. Depth of hardness of steel is increased by addition of

Tungsten

Chromium

Vanadium

Nickel

2. Blast furnace is used to produce

Pig iron

Wrought iron

Steel

Cast iron

3. German silver contains

2% silver

1% silver

5% silver

No silver

4. German silver is an alloy of

Refined silver

Nickel and copper

Silver and some impurities

Nickel, Copper and zinc

5. Corrosion resistance of steel is increased by addition of

Chromium and nickel

Vanadium, aluminium

Tungsten, molybdenum, vanadium, chromium

Sulphur, phosphorus, lead

6. Free carbon in iron makes the metal

Soft and gives a coarse grained crystalline structure

Hard and gives a coarse grained crystalline structure

Soft and gives a fine grained crystalline structure

Hard and gives a fine grained crystalline structure

7. A cold chisel is made of

High carbon

H.S.S

Cast iron

Mild steel

8. The electric process of steel making is especially adapted to

High speed tool steel

Magnet steel

All of these

Alloy and carbon tool steel

9. Machining properties of steel are improved by adding

Silicon, aluminium, titanium

Vanadium, aluminium

Chromium, nickel

Sulphur, lead, phosphorous

10. Ball bearings are, usually, made from

Chrome steel

High carbon steel

Low carbon steel

Medium carbon steel

Page 2 of 4

11. Induction hardening is the process of

Inducing hardness by continuous process

Heating and cooling rapidly

Increasing hardness throughout

Hardening surface of work-piece to obtain hard and wear resistant surface

12. Hardness of steel depends on

Contents of alloying elements

Method of fabrication

The shape and distribution of the carbides in iron

Amount of carbon it contains

13. Railway rails are normally made of

Mild steel

High carbon

Alloy steel

Tungsten steel

14. Eutectoid steel contains following percentage of carbon

0.8%

0.63%

0.3%

0.02%

15. The material widely used for making pendulums of clocks is

High speed steel

Heat resisting steel

Nickel steel

Stainless steel

16. The most effective inhibitor of grain growth, when added in small quantities is

Cobalt

Carbon

Manganese

Vanadium

17. Tungsten when added to steel __________ the critical temperature.

Raises

Lowers

None of these

Does not effect

18. The carbon in the pig iron varies from

5 to 10%

0.1 to 0.5%

0.5 to 1%

1 to 5%

19. Cyaniding is the process of

Dipping steel in cyanide bath

Obtaining cyanide salts

Reacting steel surface with cyanide salts

Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness

20. Solder is an alloy consisting of

Tin and copper

Lead and zinc

Tin and lead

Tin, antimony, copper

Page 3 of 4

21. Inconel is an alloy of

Nickel, chromium and iron

Nickel, copper

Nickel, Chromium

Nickel, zinc

22. Shock resistance of steel is increased by adding

Nickel

Sulphur, lead and phosphorus

Nickel and chromium

Chromium

23. The blade of a power saw is made of

High speed steel

Stainless steel

Malleable cast iron

Boron steel

24. An alloy of copper, tin and zinc is known as

Brass

Muntz metal

Gun metal

Bronze

25. Basic constituents of Monel metal are

Nickel, lead and tin

Zinc, tin, lead

Nickel, molybdenum

Nickel, copper

26. Process of Austempering results in

Lamellar layers of carbide distributed throughout the structure

Carburised structure

Martenistic structure

Formation of bainite structure

27. Iron ore is usually found in the form of

Carbonates

Oxides

Sulphides

All of these

28. Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is

Hastelloy

Invar

Silver metal

Duralumin

29. The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is

Chromium

Vanadium

Nickel

Cobalt

30. By severely deforming a metal in a particular direction it becomes

Anisotropic

Ductile

Homogeneous

Malleable

Page 4 of 4

31. The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as

Boeschinger effect

Visco elasticity

Hysteresis

Creep

32. When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.

(A) Cementite

(D) None of these

(C) Both ‘A’ and ‘B’

(B) Free graphite

33. An engineer's hammer is made of

Cast iron

Mild steel

Forged steel

High carbon steel

34. Quenching is not necessary when hardening is done by

Any one of these

Flame hardening

Nitriding

Case hardening

35. Hardness of martensite is about

RC 80

RC 57

RC 48

RC 65

36. The hardness of steel depends upon the

Amount of cementite it contains

Amount of carbon it contains

Method of manufacture of steel

Contents of alloying elements

37. The strength is the ability of a material to resist

None of these

Deformation under stress

Externally applied forces with breakdown or yielding

Fracture due to high impact loads

38. The property of a material due to which it breaks with little permanent distortion, is called

Plasticity

Malleability

Ductility

Brittleness

39. The basic constituents of Hastelloy are

All of the above

Nickel, Copper, etc.

Nickel, molybdenum etc.

Aluminium, copper etc.

40. Maximum percentage of carbon in ferrite is

0.025%

0.06%

0.25%

0.1%

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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