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Engineering Materials
0

Engineering Materials Practice Set-7

May 15, 2021

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Page 1 of 4

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

Nickel

Chromium

Vanadium

Cobalt

2. Eutectoid steel contains following percentage of carbon

0.3%

0.8%

0.63%

0.02%

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

Tungsten

Chromium

Vanadium

Nickel

4. An engineer's hammer is made of

High carbon steel

Cast iron

Mild steel

Forged steel

5. Quenching is not necessary when hardening is done by

Flame hardening

Nitriding

Any one of these

Case hardening

6. The blade of a power saw is made of

High speed steel

Stainless steel

Malleable cast iron

Boron steel

7. Basic constituents of Monel metal are

Nickel, copper

Zinc, tin, lead

Nickel, lead and tin

Nickel, molybdenum

8. The basic constituents of Hastelloy are

All of the above

Nickel, Copper, etc.

Nickel, molybdenum etc.

Aluminium, copper etc.

9. Hardness of martensite is about

RC 80

RC 48

RC 57

RC 65

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

High speed tool steel

Magnet steel

Alloy and carbon tool steel

All of these

Page 2 of 4

11. Corrosion resistance of steel is increased by addition of

Chromium and nickel

Tungsten, molybdenum, vanadium, chromium

Vanadium, aluminium

Sulphur, phosphorus, lead

12. German silver contains

1% silver

No silver

2% silver

5% silver

13. Shock resistance of steel is increased by adding

Chromium

Nickel

Nickel and chromium

Sulphur, lead and phosphorus

14. Iron ore is usually found in the form of

Carbonates

Oxides

All of these

Sulphides

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

Invar

Hastelloy

Duralumin

Silver metal

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

Visco elasticity

Creep

Hysteresis

Boeschinger effect

17. Process of Austempering results in

Martenistic structure

Carburised structure

Lamellar layers of carbide distributed throughout the structure

Formation of bainite structure

18. A cold chisel is made of

High carbon

Mild steel

Cast iron

H.S.S

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

(B) Free graphite

(A) Cementite

(C) Both ‘A’ and ‘B’

(D) None of these

20. The carbon in the pig iron varies from

0.1 to 0.5%

5 to 10%

1 to 5%

0.5 to 1%

Page 3 of 4

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

Ductile

Anisotropic

Malleable

Homogeneous

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

Raises

Does not effect

Lowers

None of these

23. Ball bearings are, usually, made from

Low carbon steel

Chrome steel

Medium carbon steel

High carbon steel

24. Inconel is an alloy of

Nickel, copper

Nickel, Chromium

Nickel, chromium and iron

Nickel, zinc

25. Railway rails are normally made of

High carbon

Mild steel

Alloy steel

Tungsten steel

26. Hardness of steel depends on

Contents of alloying elements

The shape and distribution of the carbides in iron

Method of fabrication

Amount of carbon it contains

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

Fracture due to high impact loads

None of these

Externally applied forces with breakdown or yielding

Deformation under stress

28. Blast furnace is used to produce

Wrought iron

Cast iron

Steel

Pig iron

29. German silver is an alloy of

Nickel and copper

Nickel, Copper and zinc

Silver and some impurities

Refined silver

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

Stainless steel

Heat resisting steel

High speed steel

Nickel steel

Page 4 of 4

31. Cyaniding is the process of

Obtaining cyanide salts

Reacting steel surface with cyanide salts

Dipping steel in cyanide bath

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

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

Cobalt

Carbon

Vanadium

Manganese

33. Solder is an alloy consisting of

Tin, antimony, copper

Lead and zinc

Tin and copper

Tin and lead

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

Gun metal

Bronze

Brass

Muntz metal

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

Plasticity

Ductility

Brittleness

Malleability

36. Maximum percentage of carbon in ferrite is

0.025%

0.1%

0.06%

0.25%

37. Machining properties of steel are improved by adding

Sulphur, lead, phosphorous

Vanadium, aluminium

Chromium, nickel

Silicon, aluminium, titanium

38. 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

39. The hardness of steel depends upon the

Contents of alloying elements

Amount of cementite it contains

Method of manufacture of steel

Amount of carbon it contains

40. Free carbon in iron makes the metal

Hard and gives a coarse grained crystalline structure

Soft and gives a coarse grained crystalline structure

Hard and gives a fine grained crystalline structure

Soft and gives a fine grained crystalline structure

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VideRime

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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