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Engineering Materials
2

Engineering Materials Practice Set-1

May 7, 2021

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Page 1 of 4

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

Magnetic steel alloys

Titanium alloys

Chromium alloys

Magnesium alloys

2. Normalising of steel is done to

All of the above

Refine the grain structure

Remove strains caused by cold working

Remove dislocations caused in the internal structure due to hot working

3. Body centered cubic space lattice is found in

Alpha iron, tungsten, chromium and molybdenum

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

None of the above

Zinc, magnesium, cobalt, cadmium, antimony and bismuth

4. Pick up the wrong statement

Manganese in steel induces hardness

Aluminium in steel results in excessive grain growth

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

Tungsten in steels improves magnetic properties and hardenability

5. 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

6. Dow metal contains

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

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

7. The percentage carbon content in wrought iron is about

0.02

0.4

0.2

0.1

8.

Blast furnace produces following by reduction of iron ore

Malleable iron

Cast iron

Pig iron

Wrought iron

9. Tensile strength of steel can be safely increased by

Adding carbon up to 0.83%

Adding carbon up to 6.3%

Adding small quantities of copper

Adding carbon up to 2.8%

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

Mainly ferrite

Pearlite and cementite

Mainly pearlite

Ferrite and pearlite

Page 2 of 4

11. 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

12. Which of the following statement is wrong?

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

The cementite is identified as round particles in the structure

Steel with 0.8% carbon is wholly pearlite

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

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

Babbitt metal

Gun metal

Aluminium bronze

Silicon bronze

14. The silicon steel is widely used for

Motor car crankshafts

Cutting tools

Generators and transformers in the form of laminated cores

Connecting rods

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

Steel

Brass

Aluminium

Cast iron

16. 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

17. The correct composition of Babbitt metal is

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

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

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

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

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

0.5%

0.8%

0.2%

1.0%

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

None of these

Less than

Equal to

More than

20. The charge of the blast furnace consists of

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)

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

Page 3 of 4

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

Aluminium

Nickel

Copper

Iron

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

Manganese

Phosphorus

Sulphur

Silicon

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

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

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

None of the above

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

30° C to 50° C below lower critical temperature

30° C to 50° C below upper critical temperature

30° C to 50° C above upper critical temperature

30° C to 50° C above lower critical temperature

25. 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 slowly in the furnace

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

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

26. In spheroidising process, the steel is

Heated below the lower critical temperature and then cooled slowly

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

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

Brass

Copper

Silver

Lead

28. Nickel in steel

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

Improves wear resistance, cutting ability and toughness

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

Raising the elastic limit

Improving machining properties

Providing corrosion resistance

Providing high strength at elevated temperatures

30. Pipes for bicycle frames are made of

Forged steel

Cold rolled steel

Cast steel

Hot rolled steel

Page 4 of 4

31. The composition of silver solder is

Silver, tin, nickel

Silver, lead, zinc

Silver, copper, aluminium

Silver, copper, zinc

32. Amorphous material is one

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

In which atoms align themselves in a geometric pattern upon solidification

Which emits fumes on melting

Which is not attacked by phosphorous

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

All of these

Uranium

Niobium

Thorium

34. A coarse grained steel

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

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

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

35. Bell metal contains

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

90% copper and 10% tin

70% copper and 30% zinc

70 - 75% copper and rest tin

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

Interstitial solid solution

All of the above

Substitutional solid solution

Intermetallic compounds

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

Nickel

Magnesium

Manganese

Silicon

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

More than

None of these

Equal to

Less than

39. 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 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 in still air

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

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

Delta metal

Constantan

Monel metal

Nichrome

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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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March 15, 2026 at 10:21 am
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创建Binance账户 says:
March 15, 2026 at 11:15 pm
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