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Engineering Materials
2

Engineering Materials Practice Set-1

May 7, 2021

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Page 1 of 4

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

More than

Less than

Equal to

None of these

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

Niobium

Thorium

All of these

Uranium

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

Intermetallic compounds

Substitutional solid solution

All of the above

Interstitial solid solution

4. Dow metal contains

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

90% aluminium and 90% copper

90% magnesium and 9% aluminium with some copper

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

5. The correct composition of Babbitt metal is

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

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

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

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

6. Steel contains

Alloying elements like chromium, tungsten nickel and copper

Elements like phosphorus, sulphur and silicon in varying quantities

50% or more iron

80% or more iron

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

1.0%

0.5%

0.8%

0.2%

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

Steel

Aluminium

Brass

Cast iron

9. The charge of the blast furnace consists of

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

Calcined ore, coke and limestone all in equal parts

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

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

10. The percentage carbon content in wrought iron is about

0.1

0.02

0.4

0.2

Page 2 of 4

11. Body centered cubic space lattice is found in

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

Zinc, magnesium, cobalt, cadmium, antimony and bismuth

None of the above

Alpha iron, tungsten, chromium and molybdenum

12. For a steel containing 0.8% carbon

There is no critical point

There is only one critical point

There can be any number of critical points

There are two critical points

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

Magnesium

Manganese

Nickel

Silicon

14. 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 lower critical temperature

30° C to 50° C below upper critical temperature

30° C to 50° C above lower critical temperature

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

Silicon

Sulphur

Phosphorus

Manganese

16.

Blast furnace produces following by reduction of iron ore

Cast iron

Pig iron

Malleable iron

Wrought iron

17. Bell metal contains

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

70% copper and 30% zinc

90% copper and 10% tin

70 - 75% copper and rest tin

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

Iron

Aluminium

Nickel

Copper

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

None of the above

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

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

20. Nickel in steel

Improves wear resistance, cutting ability and toughness

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

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

Improves cutting ability and reduces hardenability

Page 3 of 4

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

Silicon bronze

Aluminium bronze

Babbitt metal

Gun metal

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

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

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

23. Pipes for bicycle frames are made of

Forged steel

Cast steel

Cold rolled steel

Hot rolled steel

24. Pick up the wrong statement

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

Manganese in steel induces hardness

Aluminium in steel results in excessive grain growth

Tungsten in steels improves magnetic properties and hardenability

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

Constantan

Delta metal

Nichrome

Monel metal

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

Titanium alloys

Magnetic steel alloys

Chromium alloys

Magnesium alloys

27. The composition of silver solder is

Silver, tin, nickel

Silver, lead, zinc

Silver, copper, zinc

Silver, copper, aluminium

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

Mainly ferrite

Ferrite and pearlite

Mainly pearlite

Pearlite and cementite

29. Tensile strength of steel can be safely increased by

Adding small quantities of copper

Adding carbon up to 6.3%

Adding carbon up to 2.8%

Adding carbon up to 0.83%

30. Normalising of steel is done to

Refine the grain structure

All of the above

Remove dislocations caused in the internal structure due to hot working

Remove strains caused by cold working

Page 4 of 4

31. A coarse grained steel

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

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

32. In process annealing, the hypo eutectoid steel is

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

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

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

Providing corrosion resistance

Improving machining properties

Raising the elastic limit

Providing high strength at elevated temperatures

34. Which of the following statement is wrong?

The cementite is identified as round particles in the structure

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

Steel with 0.8% carbon is wholly pearlite

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

35. Amorphous material is one

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

Which emits fumes on melting

In which atoms align themselves in a geometric pattern upon solidification

Which is not attacked by phosphorous

36. Y-alloy contains

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

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

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

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

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

Brass

Lead

Silver

Copper

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

Less than

None of these

More than

Equal to

39. In spheroidising process, the steel is

None of the above

Heated below the lower critical temperature and then cooled slowly

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

40. The silicon steel is widely used for

Generators and transformers in the form of laminated cores

Connecting rods

Motor car crankshafts

Cutting tools

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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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