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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

High speed steel

Nickel steel

Stainless steel

Heat resisting steel

2. Basic constituents of Monel metal are

Nickel, molybdenum

Nickel, lead and tin

Nickel, copper

Zinc, tin, lead

3. Free carbon in iron makes the metal

Soft and gives a fine grained crystalline structure

Hard and gives a coarse grained crystalline structure

Hard and gives a fine grained crystalline structure

Soft and gives a coarse grained crystalline structure

4. Machining properties of steel are improved by adding

Silicon, aluminium, titanium

Vanadium, aluminium

Sulphur, lead, phosphorous

Chromium, nickel

5. Induction hardening is the process of

Inducing hardness by continuous process

Increasing hardness throughout

Heating and cooling rapidly

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

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

Gun metal

Bronze

Muntz metal

Brass

7. Maximum percentage of carbon in ferrite is

0.025%

0.1%

0.06%

0.25%

8. Solder is an alloy consisting of

Tin, antimony, copper

Lead and zinc

Tin and copper

Tin and lead

9. The basic constituents of Hastelloy are

Aluminium, copper etc.

Nickel, molybdenum etc.

All of the above

Nickel, Copper, etc.

10. Iron ore is usually found in the form of

Sulphides

Carbonates

Oxides

All of these

Page 2 of 4

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

Invar

Hastelloy

Duralumin

Silver metal

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

Ductility

Plasticity

Malleability

Brittleness

13. German silver is an alloy of

Nickel and copper

Refined silver

Silver and some impurities

Nickel, Copper and zinc

14. 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

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

Creep

Visco elasticity

Hysteresis

Boeschinger effect

16. Cyaniding is the process of

Reacting steel surface with cyanide salts

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

Obtaining cyanide salts

Dipping steel in cyanide bath

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

Lowers

None of these

Raises

Does not effect

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

(A) Cementite

(B) Free graphite

(D) None of these

(C) Both ‘A’ and ‘B’

19. An engineer's hammer is made of

Cast iron

Forged steel

High carbon steel

Mild steel

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

Homogeneous

Malleable

Ductile

Anisotropic

Page 3 of 4

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

Carbon

Manganese

Cobalt

Vanadium

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

Vanadium

Chromium

Tungsten

Nickel

23. Railway rails are normally made of

Mild steel

Tungsten steel

Alloy steel

High carbon

24. A cold chisel is made of

High carbon

Cast iron

Mild steel

H.S.S

25. The blade of a power saw is made of

Boron steel

Malleable cast iron

High speed steel

Stainless steel

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

Alloy and carbon tool steel

Magnet steel

High speed tool steel

All of these

27. Shock resistance of steel is increased by adding

Nickel and chromium

Nickel

Sulphur, lead and phosphorus

Chromium

28. Hardness of steel depends on

Amount of carbon it contains

Method of fabrication

Contents of alloying elements

The shape and distribution of the carbides in iron

29. German silver contains

2% silver

No silver

5% silver

1% silver

30. Quenching is not necessary when hardening is done by

Flame hardening

Case hardening

Any one of these

Nitriding

Page 4 of 4

31. Eutectoid steel contains following percentage of carbon

0.8%

0.3%

0.63%

0.02%

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

Nickel

Vanadium

Cobalt

Chromium

33. The carbon in the pig iron varies from

0.5 to 1%

5 to 10%

1 to 5%

0.1 to 0.5%

34. Ball bearings are, usually, made from

Chrome steel

Low carbon steel

Medium carbon steel

High carbon steel

35. Process of Austempering results in

Carburised structure

Martenistic structure

Lamellar layers of carbide distributed throughout the structure

Formation of bainite structure

36. Hardness of martensite is about

RC 57

RC 48

RC 65

RC 80

37. Blast furnace is used to produce

Cast iron

Wrought iron

Pig iron

Steel

38. Corrosion resistance of steel is increased by addition of

Chromium and nickel

Tungsten, molybdenum, vanadium, chromium

Vanadium, aluminium

Sulphur, phosphorus, lead

39. Inconel is an alloy of

Nickel, chromium and iron

Nickel, copper

Nickel, zinc

Nickel, Chromium

40. The hardness of steel depends upon the

Contents of alloying elements

Amount of carbon it contains

Method of manufacture of steel

Amount of cementite it contains

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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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