Engineering Materials Practice Set-7

Page 1 of 4

1. 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

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

All of these

Magnet steel

High speed tool steel

Alloy and carbon tool steel

3. 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

4. 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

5. Maximum percentage of carbon in ferrite is

0.1%

0.25%

0.06%

0.025%

6. Process of Austempering results in

Formation of bainite structure

Carburised structure

Martenistic structure

Lamellar layers of carbide distributed throughout the structure

7. Induction hardening is the process of

Heating and cooling rapidly

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

Increasing hardness throughout

Inducing hardness by continuous process

8. Hardness of steel depends on

Contents of alloying elements

The shape and distribution of the carbides in iron

Amount of carbon it contains

Method of fabrication

9. Basic constituents of Monel metal are

Nickel, copper

Nickel, molybdenum

Zinc, tin, lead

Nickel, lead and tin

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

Vanadium

Chromium

Cobalt

Nickel

Page 2 of 4

11. Shock resistance of steel is increased by adding

Nickel and chromium

Nickel

Sulphur, lead and phosphorus

Chromium

12. Iron ore is usually found in the form of

All of these

Carbonates

Oxides

Sulphides

13. The carbon in the pig iron varies from

5 to 10%

0.1 to 0.5%

1 to 5%

0.5 to 1%

14. 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

15. German silver is an alloy of

Refined silver

Nickel and copper

Silver and some impurities

Nickel, Copper and zinc

16. Free carbon in iron makes the metal

Soft and gives a coarse grained crystalline structure

Soft and gives a fine grained crystalline structure

Hard and gives a fine grained crystalline structure

Hard and gives a coarse grained crystalline structure

17. An engineer's hammer is made of

Mild steel

Cast iron

High carbon steel

Forged steel

18. The blade of a power saw is made of

High speed steel

Malleable cast iron

Stainless steel

Boron steel

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

Muntz metal

Bronze

Gun metal

Brass

20. Eutectoid steel contains following percentage of carbon

0.3%

0.63%

0.02%

0.8%

Page 3 of 4

21. Corrosion resistance of steel is increased by addition of

Sulphur, phosphorus, lead

Chromium and nickel

Tungsten, molybdenum, vanadium, chromium

Vanadium, aluminium

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

Externally applied forces with breakdown or yielding

None of these

Deformation under stress

Fracture due to high impact loads

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

Does not effect

Lowers

None of these

Raises

24. Quenching is not necessary when hardening is done by

Any one of these

Case hardening

Flame hardening

Nitriding

25. Hardness of martensite is about

RC 48

RC 80

RC 65

RC 57

26. German silver contains

1% silver

No silver

5% silver

2% silver

27. Machining properties of steel are improved by adding

Chromium, nickel

Silicon, aluminium, titanium

Sulphur, lead, phosphorous

Vanadium, aluminium

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

Stainless steel

Heat resisting steel

Nickel steel

High speed steel

29. Ball bearings are, usually, made from

High carbon steel

Medium carbon steel

Chrome steel

Low carbon steel

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

Ductile

Anisotropic

Malleable

Homogeneous

Page 4 of 4

31. Railway rails are normally made of

High carbon

Alloy steel

Tungsten steel

Mild steel

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

Vanadium

Cobalt

Manganese

Carbon

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

Invar

Duralumin

Hastelloy

Silver metal

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

Brittleness

Plasticity

Malleability

Ductility

35. Blast furnace is used to produce

Cast iron

Pig iron

Wrought iron

Steel

36. Solder is an alloy consisting of

Tin, antimony, copper

Tin and lead

Lead and zinc

Tin and copper

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

Chromium

Tungsten

Vanadium

Nickel

38. A cold chisel is made of

Cast iron

Mild steel

H.S.S

High carbon

39. Inconel is an alloy of

Nickel, Chromium

Nickel, zinc

Nickel, copper

Nickel, chromium and iron

40. The basic constituents of Hastelloy are

Aluminium, copper etc.

Nickel, Copper, etc.

Nickel, molybdenum etc.

All of the above

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