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Engineering Materials
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Engineering Materials Practice Set-1

May 7, 2021

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Page 1 of 4

1. 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

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

Gun metal

Aluminium bronze

Babbitt metal

Silicon bronze

3. Body centered cubic space lattice is found in

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

None of the above

Zinc, magnesium, cobalt, cadmium, antimony and bismuth

Alpha iron, tungsten, chromium and molybdenum

4. The composition of silver solder is

Silver, copper, aluminium

Silver, tin, nickel

Silver, copper, zinc

Silver, lead, zinc

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

Nickel

Aluminium

Iron

Copper

6. Pipes for bicycle frames are made of

Forged steel

Cold rolled steel

Cast steel

Hot rolled steel

7. In spheroidising process, the steel is

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

Heated below the lower critical temperature and then cooled slowly

None of the above

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

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

Pearlite and cementite

Ferrite and pearlite

Mainly pearlite

Mainly ferrite

9. The percentage carbon content in wrought iron is about

0.1

0.2

0.4

0.02

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

Constantan

Nichrome

Monel metal

Delta metal

Page 2 of 4

11. Tensile strength of steel can be safely increased by

Adding carbon up to 6.3%

Adding small quantities of copper

Adding carbon up to 0.83%

Adding carbon up to 2.8%

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

Lead

Brass

Silver

Copper

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

Manganese

Silicon

Sulphur

Phosphorus

14. 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 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

15. 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 is not attacked by phosphorous

Which emits fumes on melting

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

Aluminium

Cast iron

Brass

Steel

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

All of the above

Substitutional solid solution

Intermetallic compounds

Interstitial solid solution

18. Normalising of steel is done to

Remove strains caused by cold working

Remove dislocations caused in the internal structure due to hot working

Refine the grain structure

All of the above

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

1.0%

0.5%

0.2%

0.8%

20. The correct composition of Babbitt metal is

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

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

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

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

Page 3 of 4

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

Thorium

Uranium

Niobium

All of these

22.

Blast furnace produces following by reduction of iron ore

Pig iron

Cast iron

Wrought iron

Malleable iron

23. Nickel in steel

Improves wear resistance, cutting ability and toughness

Improves cutting ability and reduces hardenability

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

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

24. The silicon steel is widely used for

Connecting rods

Motor car crankshafts

Cutting tools

Generators and transformers in the form of laminated cores

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

Equal to

Less than

More than

None of these

26. The charge of the blast furnace consists of

Calcined ore, coke and limestone all in equal parts

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

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

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

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

Magnesium

Nickel

Silicon

Manganese

28. Which of the following statement is wrong?

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

Steel with 0.8% carbon is wholly pearlite

The cementite is identified as round particles in the structure

29. A coarse grained steel

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

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

30. Steel contains

Alloying elements like chromium, tungsten nickel and copper

80% or more iron

Elements like phosphorus, sulphur and silicon in varying quantities

50% or more iron

Page 4 of 4

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

Equal to

None of these

Less than

More than

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

Titanium alloys

Magnesium alloys

Chromium alloys

Magnetic steel alloys

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

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

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 slowly in the furnace

34. Y-alloy contains

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

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

35. Dow metal contains

90% magnesium and 9% aluminium with some copper

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

90% aluminium and 90% copper

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

36. 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

Tungsten in steels improves magnetic properties and hardenability

Aluminium in steel results in excessive grain growth

37. For a steel containing 0.8% carbon

There is no critical point

There can be any number of critical points

There is only one critical point

There are two critical points

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

Providing corrosion resistance

Raising the elastic limit

Providing high strength at elevated temperatures

Improving machining properties

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

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

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

40. Bell metal contains

70 - 75% copper and rest tin

90% copper and 10% tin

70% copper and 30% zinc

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

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VideRime

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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