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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 material widely used for making pendulums of clocks is

Nickel steel

Stainless steel

Heat resisting steel

High speed steel

2. Quenching is not necessary when hardening is done by

Flame hardening

Case hardening

Nitriding

Any one of these

3. 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

4. Induction hardening is the process of

Inducing hardness by continuous process

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

Increasing hardness throughout

Heating and cooling rapidly

5. The basic constituents of Hastelloy are

All of the above

Nickel, molybdenum etc.

Nickel, Copper, etc.

Aluminium, copper etc.

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

Hysteresis

Boeschinger effect

Visco elasticity

Creep

7. Blast furnace is used to produce

Steel

Cast iron

Pig iron

Wrought iron

8. Inconel is an alloy of

Nickel, Chromium

Nickel, zinc

Nickel, copper

Nickel, chromium and iron

9. Hardness of steel depends on

Method of fabrication

Amount of carbon it contains

The shape and distribution of the carbides in iron

Contents of alloying elements

10. Maximum percentage of carbon in ferrite is

0.25%

0.06%

0.025%

0.1%

Page 2 of 4

11. Railway rails are normally made of

Alloy steel

Mild steel

Tungsten steel

High carbon

12. The blade of a power saw is made of

Stainless steel

Malleable cast iron

Boron steel

High speed steel

13. Process of Austempering results in

Martenistic structure

Lamellar layers of carbide distributed throughout the structure

Carburised structure

Formation of bainite structure

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

Malleable

Ductile

Anisotropic

Homogeneous

15. Ball bearings are, usually, made from

Chrome steel

High carbon steel

Medium carbon steel

Low carbon steel

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

Cobalt

Manganese

Carbon

Vanadium

17. An engineer's hammer is made of

Forged steel

Mild steel

High carbon steel

Cast iron

18. German silver contains

No silver

2% silver

5% silver

1% silver

19. Iron ore is usually found in the form of

All of these

Sulphides

Carbonates

Oxides

20. Free carbon in iron makes the metal

Hard and gives a coarse grained crystalline structure

Hard and gives a fine grained crystalline structure

Soft and gives a coarse grained crystalline structure

Soft and gives a fine grained crystalline structure

Page 3 of 4

21. Basic constituents of Monel metal are

Nickel, lead and tin

Zinc, tin, lead

Nickel, molybdenum

Nickel, copper

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

All of these

Alloy and carbon tool steel

High speed tool steel

Magnet steel

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

Ductility

Brittleness

Malleability

Plasticity

24. The carbon in the pig iron varies from

5 to 10%

1 to 5%

0.5 to 1%

0.1 to 0.5%

25. German silver is an alloy of

Nickel and copper

Nickel, Copper and zinc

Silver and some impurities

Refined silver

26. Shock resistance of steel is increased by adding

Nickel and chromium

Chromium

Nickel

Sulphur, lead and phosphorus

27. Machining properties of steel are improved by adding

Vanadium, aluminium

Sulphur, lead, phosphorous

Silicon, aluminium, titanium

Chromium, nickel

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

Chromium

Vanadium

Cobalt

Nickel

29. Solder is an alloy consisting of

Tin, antimony, copper

Tin and copper

Tin and lead

Lead and zinc

30. 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

Page 4 of 4

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

Gun metal

Muntz metal

Brass

Bronze

32. A cold chisel is made of

H.S.S

High carbon

Mild steel

Cast iron

33. Hardness of martensite is about

RC 80

RC 65

RC 57

RC 48

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

(D) None of these

(C) Both ‘A’ and ‘B’

(A) Cementite

(B) Free graphite

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

Raises

Does not effect

Lowers

None of these

36. Eutectoid steel contains following percentage of carbon

0.3%

0.02%

0.63%

0.8%

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

None of these

Deformation under stress

Fracture due to high impact loads

Externally applied forces with breakdown or yielding

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

Invar

Silver metal

Hastelloy

Duralumin

39. Corrosion resistance of steel is increased by addition of

Tungsten, molybdenum, vanadium, chromium

Chromium and nickel

Vanadium, aluminium

Sulphur, phosphorus, lead

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

Vanadium

Nickel

Tungsten

Chromium

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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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