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Engineering Materials
0

Engineering Materials Practice Set-7

May 15, 2021

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Page 1 of 4

1. Machining properties of steel are improved by adding

Vanadium, aluminium

Silicon, aluminium, titanium

Sulphur, lead, phosphorous

Chromium, nickel

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

Hastelloy

Invar

Duralumin

Silver metal

3. Iron ore is usually found in the form of

Oxides

All of these

Sulphides

Carbonates

4. Solder is an alloy consisting of

Tin, antimony, copper

Tin and copper

Lead and zinc

Tin and lead

5. Cyaniding is the process of

Dipping steel in cyanide bath

Reacting steel surface with cyanide salts

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

Obtaining cyanide salts

6. Railway rails are normally made of

Tungsten steel

Alloy steel

Mild steel

High carbon

7. Maximum percentage of carbon in ferrite is

0.1%

0.25%

0.025%

0.06%

8. 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

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

Anisotropic

Malleable

Ductile

Homogeneous

10. German silver is an alloy of

Silver and some impurities

Refined silver

Nickel, Copper and zinc

Nickel and copper

Page 2 of 4

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

None of these

Lowers

Raises

Does not effect

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

Vanadium

Cobalt

Nickel

Chromium

13. Shock resistance of steel is increased by adding

Sulphur, lead and phosphorus

Nickel and chromium

Nickel

Chromium

14. The basic constituents of Hastelloy are

Nickel, Copper, etc.

Nickel, molybdenum etc.

Aluminium, copper etc.

All of the above

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

Creep

Hysteresis

Boeschinger effect

Visco elasticity

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

High speed tool steel

Magnet steel

All of these

Alloy and carbon tool steel

17. German silver contains

No silver

1% silver

2% silver

5% silver

18. Inconel is an alloy of

Nickel, zinc

Nickel, Chromium

Nickel, chromium and iron

Nickel, copper

19. Eutectoid steel contains following percentage of carbon

0.63%

0.02%

0.3%

0.8%

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

Gun metal

Muntz metal

Brass

Bronze

Page 3 of 4

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

Heat resisting steel

Stainless steel

High speed steel

Nickel steel

22. Hardness of steel depends on

The shape and distribution of the carbides in iron

Method of fabrication

Contents of alloying elements

Amount of carbon it contains

23. The hardness of steel depends upon the

Amount of cementite it contains

Contents of alloying elements

Method of manufacture of steel

Amount of carbon it contains

24. Corrosion resistance of steel is increased by addition of

Chromium and nickel

Tungsten, molybdenum, vanadium, chromium

Sulphur, phosphorus, lead

Vanadium, aluminium

25. Quenching is not necessary when hardening is done by

Flame hardening

Nitriding

Case hardening

Any one of these

26. A cold chisel is made of

High carbon

Cast iron

Mild steel

H.S.S

27. Hardness of martensite is about

RC 57

RC 80

RC 48

RC 65

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

Nickel

Chromium

Vanadium

Tungsten

29. Induction hardening is the process of

Increasing hardness throughout

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

Heating and cooling rapidly

Inducing hardness by continuous process

30. An engineer's hammer is made of

High carbon steel

Forged steel

Cast iron

Mild steel

Page 4 of 4

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

Fracture due to high impact loads

Externally applied forces with breakdown or yielding

Deformation under stress

None of these

32. Basic constituents of Monel metal are

Nickel, copper

Nickel, molybdenum

Nickel, lead and tin

Zinc, tin, lead

33. The carbon in the pig iron varies from

0.5 to 1%

1 to 5%

0.1 to 0.5%

5 to 10%

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

(D) None of these

(A) Cementite

(C) Both ‘A’ and ‘B’

(B) Free graphite

35. Process of Austempering results in

Formation of bainite structure

Carburised structure

Martenistic structure

Lamellar layers of carbide distributed throughout the structure

36. Ball bearings are, usually, made from

Chrome steel

Medium carbon steel

High carbon steel

Low carbon steel

37. The blade of a power saw is made of

Stainless steel

Boron steel

High speed steel

Malleable cast iron

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

Brittleness

Ductility

Plasticity

Malleability

39. Blast furnace is used to produce

Cast iron

Steel

Wrought iron

Pig iron

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

Manganese

Carbon

Cobalt

Vanadium

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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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