Engineering Materials Practice Set-7

Page 1 of 4

1. Iron ore is usually found in the form of

All of these

Carbonates

Oxides

Sulphides

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

Duralumin

Invar

Silver metal

Hastelloy

3. German silver is an alloy of

Nickel, Copper and zinc

Refined silver

Silver and some impurities

Nickel and copper

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

Deformation under stress

Externally applied forces with breakdown or yielding

Fracture due to high impact loads

None of these

5. Cyaniding is the process of

Reacting steel surface with cyanide salts

Obtaining cyanide salts

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

Dipping steel in cyanide bath

6. The hardness of steel depends upon the

Amount of cementite it contains

Amount of carbon it contains

Contents of alloying elements

Method of manufacture of steel

7. The basic constituents of Hastelloy are

All of the above

Aluminium, copper etc.

Nickel, Copper, etc.

Nickel, molybdenum etc.

8. The carbon in the pig iron varies from

0.1 to 0.5%

0.5 to 1%

1 to 5%

5 to 10%

9. Hardness of steel depends on

Amount of carbon it contains

Contents of alloying elements

The shape and distribution of the carbides in iron

Method of fabrication

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

Nickel steel

Heat resisting steel

High speed steel

Stainless steel

Page 2 of 4

11. Process of Austempering results in

Martenistic structure

Lamellar layers of carbide distributed throughout the structure

Carburised structure

Formation of bainite structure

12. Corrosion resistance of steel is increased by addition of

Vanadium, aluminium

Tungsten, molybdenum, vanadium, chromium

Sulphur, phosphorus, lead

Chromium and nickel

13. Maximum percentage of carbon in ferrite is

0.06%

0.025%

0.25%

0.1%

14. Hardness of martensite is about

RC 80

RC 65

RC 48

RC 57

15. Solder is an alloy consisting of

Tin and lead

Tin and copper

Tin, antimony, copper

Lead and zinc

16. Shock resistance of steel is increased by adding

Sulphur, lead and phosphorus

Nickel

Chromium

Nickel and chromium

17. Free carbon in iron makes the metal

Hard and gives a fine grained crystalline structure

Hard and gives a coarse grained crystalline structure

Soft and gives a coarse grained crystalline structure

Soft and gives a fine grained crystalline structure

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

Plasticity

Malleability

Brittleness

Ductility

19. Quenching is not necessary when hardening is done by

Any one of these

Nitriding

Case hardening

Flame hardening

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

Carbon

Manganese

Vanadium

Cobalt

Page 3 of 4

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

Raises

None of these

Does not effect

Lowers

22. A cold chisel is made of

High carbon

H.S.S

Cast iron

Mild steel

23. German silver contains

5% silver

2% silver

1% silver

No silver

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

Bronze

Gun metal

Brass

Muntz metal

25. The blade of a power saw is made of

Malleable cast iron

High speed steel

Boron steel

Stainless steel

26. Basic constituents of Monel metal are

Nickel, copper

Nickel, lead and tin

Nickel, molybdenum

Zinc, tin, lead

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

Alloy and carbon tool steel

High speed tool steel

Magnet steel

All of these

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

Hysteresis

Boeschinger effect

Creep

Visco elasticity

29. 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

30. Eutectoid steel contains following percentage of carbon

0.02%

0.8%

0.63%

0.3%

Page 4 of 4

31. Inconel is an alloy of

Nickel, copper

Nickel, zinc

Nickel, chromium and iron

Nickel, Chromium

32. Ball bearings are, usually, made from

Low carbon steel

Chrome steel

High carbon steel

Medium carbon steel

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

Vanadium

Chromium

Tungsten

Nickel

34. An engineer's hammer is made of

Forged steel

Mild steel

High carbon steel

Cast iron

35. Blast furnace is used to produce

Wrought iron

Cast iron

Steel

Pig iron

36. 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

(B) Free graphite

(C) Both ‘A’ and ‘B’

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

Anisotropic

Homogeneous

Malleable

Ductile

38. Machining properties of steel are improved by adding

Silicon, aluminium, titanium

Chromium, nickel

Sulphur, lead, phosphorous

Vanadium, aluminium

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

Chromium

Vanadium

Cobalt

Nickel

40. Railway rails are normally made of

Mild steel

High carbon

Alloy steel

Tungsten steel

Engineering Materials Practice Set-7

Related

Leave a ReplyCancel reply

Secured Payments

Protection

Engineering Materials Practice Set-7

Share this Now with Friends:

Related

Leave a ReplyCancel reply

Secured Payments

Protection