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Engineering Materials
2

Engineering Materials Practice Set-1

May 7, 2021

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Page 1 of 4

1.

Blast furnace produces following by reduction of iron ore

Pig iron

Cast iron

Wrought iron

Malleable iron

2. The percentage carbon content in wrought iron is about

0.02

0.4

0.2

0.1

3. When steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of

Ferrite and pearlite

Mainly ferrite

Mainly pearlite

Pearlite and cementite

4. Cemented carbide tools are not found to be suitable for cutting

Aluminium

Brass

Steel

Cast iron

5. According to Indian standard specifications, SG 400/15 means

Spheroidal graphite cast iron with minimum compressive strength 400 MPa and 15 percent reduction in area

None of the above

Spheroidal graphite cast iron with B.H.N. 400 and minimum tensile strength 15 MPa

Spheroidal graphite cast iron with minimum tensile strength 400 MPa and 15 percent elongation

6. Which of the following metal is used for nuclear energy?

Thorium

All of these

Niobium

Uranium

7. Which of the following statement is wrong?

Steel with 0.8% carbon is wholly pearlite

The cementite is identified as round particles in the structure

A mechanical mixture of 87% cementite and 13% ferrite is called pearlite

The amount of cementite increases with the increase in percentage of carbon in iron

8. Which one of the following metals would work-harden more quickly than the others?

Brass

Copper

Lead

Silver

9. Tensile strength of steel can be safely increased by

Adding carbon up to 6.3%

Adding carbon up to 0.83%

Adding carbon up to 2.8%

Adding small quantities of copper

10. Bell metal contains

90% copper and 10% tin

70 - 75% copper and rest tin

85 - 92% copper and rest tin with little lead and nickel

70% copper and 30% zinc

Page 2 of 4

11. The following element can't impart high strength at elevated temperature

Magnesium

Manganese

Nickel

Silicon

12. Steel contains

50% or more iron

80% or more iron

Elements like phosphorus, sulphur and silicon in varying quantities

Alloying elements like chromium, tungsten nickel and copper

13. A coarse grained steel

Is more ductile and has a less tendency to distort during heat treatment

Is less tough and has a greater tendency to distort during heat treatment

Is more ductile and has a greater tendency to distort during heat treatment

Is less tough and has a less tendency to distort during heat treatment

14. The composition of silver solder is

Silver, copper, zinc

Silver, copper, aluminium

Silver, lead, zinc

Silver, tin, nickel

15. Which of the following has a fine gold colour and is used for imitation jewellery?

Aluminium bronze

Babbitt metal

Silicon bronze

Gun metal

16. Heavy duty leaf and coil springs contain carbon of the following order

1.0%

0.5%

0.2%

0.8%

17. Normalising of steel is done to

Remove strains caused by cold working

Refine the grain structure

Remove dislocations caused in the internal structure due to hot working

All of the above

18. The temperature required for full annealing in hypereutectoid steel is

30° C to 50° C above upper critical temperature

30° C to 50° C below upper critical temperature

30° C to 50° C above lower critical temperature

30° C to 50° C below lower critical temperature

19. The charge of the blast furnace consists of

Calcined ore (8 parts), coke (4 parts) and limestone (1 part)

Calcined ore (4 parts), coke (1 part) and limestone (8 parts)

Calcined ore (1 part), coke (8 parts) and limestone (4 parts)

Calcined ore, coke and limestone all in equal parts

20. In a hardening process, the hypo-eutectoid steel is

Heated below or closes to the lower critical temperature and then cooled slowly

Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium

Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace

Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air

Page 3 of 4

21. Which of the following alloys does not have copper as one of the constituents?

Monel metal

Delta metal

Nichrome

Constantan

22. When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.

More than

Less than

Equal to

None of these

23. For a steel containing 0.8% carbon

There is only one critical point

There are two critical points

There is no critical point

There can be any number of critical points

24. Amorphous material is one

In which atoms align themselves in a geometric pattern upon solidification

In which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid

Which is not attacked by phosphorous

Which emits fumes on melting

25. Pipes for bicycle frames are made of

Hot rolled steel

Cast steel

Cold rolled steel

Forged steel

26. Pick up the wrong statement

Manganese in steel induces hardness

Aluminium in steel results in excessive grain growth

Tungsten in steels improves magnetic properties and hardenability

Nickel and chromium in steel helps in raising the elastic limit and improve the resilience and ductility

27. Brass (alloy of copper and zinc) is an example of

Substitutional solid solution

All of the above

Intermetallic compounds

Interstitial solid solution

28. Nickel in steel

Improves wear resistance, cutting ability and toughness

Gives ductility, toughness, tensile strength and anti-corrosion properties

Improves cutting ability and reduces hardenability

Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

29. The correct composition of Babbitt metal is

90% Sn, 2% Cu, 4% Sb, 2% Bi, 2% Mg

82% Sn, 4% Cu, 8% Sb, 3% Al, 3% Mg

87% Sn, 4% Cu, 8% Sb, 1% Al

87.75% Sn, 4% Cu, 8% Sb, 0.25% Bi

30. Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element

Copper

Iron

Nickel

Aluminium

Page 4 of 4

31. The silicon steel is widely used for

Cutting tools

Connecting rods

Generators and transformers in the form of laminated cores

Motor car crankshafts

32. Which of the following impurity in cast iron makes it hard and brittle?

Sulphur

Silicon

Phosphorus

Manganese

33. Pick up the wrong statement Nickel and chromium in steel help in

Raising the elastic limit

Providing corrosion resistance

Improving machining properties

Providing high strength at elevated temperatures

34. In process annealing, the hypo eutectoid steel is

Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace

Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium

Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air

Heated below or closes to the lower critical temperature and then cooled slowly

35. Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.

Equal to

Less than

None of these

More than

36. Body centered cubic space lattice is found in

Zinc, magnesium, cobalt, cadmium, antimony and bismuth

Alpha iron, tungsten, chromium and molybdenum

Gamma iron, aluminium, copper, lead, silver and nickel

None of the above

37. In spheroidising process, the steel is

None of the above

Heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C

Heated up to the lower critical temperature and then cooled in still air

Heated below the lower critical temperature and then cooled slowly

38. Y-alloy contains

3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium

5 to 6% tin, 2 to 3% copper and rest aluminium

4 to 4.5% magnesium, 3 to 4% copper and rest aluminium

3.5 to 4.5% copper, 0.4 to 0.7% magnesium, 0.4 to 0.7% manganese and rest aluminium

39. Which of the following has highest specific strength of all structural materials?

Magnesium alloys

Magnetic steel alloys

Titanium alloys

Chromium alloys

40. Dow metal contains

92.5% aluminium and, 4% copper, 2% nickel and 1.5% Mg

90% magnesium and 9% aluminium with some copper

90% aluminium and 90% copper

94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe

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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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anm"ala dig till binance says:
March 15, 2026 at 10:21 am
I don’t think the title of your article matches the content lol. Just kidding, mainly because I had some doubts after reading the article. https://accounts.binance.com/de-CH/register?ref=W0BCQMF1
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创建Binance账户 says:
March 15, 2026 at 11:15 pm
Can you be more specific about the content of your article? After reading it, I still have some doubts. Hope you can help me.
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