Skip to content

VideRime Online Learning

Search for:

Home
GK/GA MCQs
Questions?
- Ask Question
- Questions
Direct Links
Submit Article
Contact Us
Membership Registration
Login
Signup Now

Home
GK/GA MCQs
Questions?
- Ask Question
- Questions
Direct Links
Submit Article
Contact Us
Membership Registration
Login
Signup Now

Engineering Materials
0

Engineering Materials Practice Set-3

May 9, 2021

Show paginator

Hide paginator

25%

Page 1 of 4

1. Corundum contains more than 95%

MgO

Steel

Al₂O₃

SiO₂

2. The portion of the blast furnace below its widest cross-section is called

Stack

Throat

Bosh

Hearth

3. The metal suitable for bearings subjected to heavy loads, is

White metal

Silicon bronze

Monel metal

Phosphor bronze

4. Which of the following property is desirable for materials used in tools and machines?

Plasticity

Malleability

Ductility

Elasticity

5. There are fourteen atoms in a unit cell of

Close packed hexagonal space lattice

Body centered cubic space lattice

None of these

Face centered cubic space lattice

6. The property of a material which enables it to retain the deformation permanently, is called

Plasticity

Ductility

Malleability

Brittleness

7. Which of the following statement is incorrect about duralumin?

It can be forged

It has good machining properties

It is prone to age hardening

It is lighter than pure aluminium

8. Tungsten 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

9. Taps dies and drills contain carbon

Above 2.2%

Below 0.5%

Below 1%

Above 1%

10. Cementite consist of

6.67% carbon and 93.33% iron

13% carbon and 87% ferrite

13% ferrite and 87% cementite

13% cementite and 87% ferrite

Page 2 of 4

11. Which of the following elements does not impart hardness to steel?

Copper

Silicon

Chromium

Nickel

12. Gamma-iron occurs between the temperature ranges of

400°C to 600°C

1400°C to 1530°C

900°C to 1400°C

600°C to 900°C

13. Which of the following represents the allotropic forms of iron?

Alpha iron and beta iron

Alpha iron, beta iron and gamma iron

Alpha iron, gamma iron and delta iron

Body centered cubic iron and face centered cubic iron

14. Which of the following property is desirable in parts subjected to shock and impact loads?

Toughness

Brittleness

Stiffness

Strength

15. The hardness of steel primarily depends on

Heat treatment employed

Shape of carbides and their distribution in iron

Percentage of alloying elements

Percentage of carbon

16. Cobalt in steel

Improves cutting ability and reduce hardenability

Gives ductility, toughness, tensile strength and anti corrosion property

Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties

Improves wear resistance, cutting ability and toughness

17. A specimen of aluminium metal when observed under microscope shows

A complex cubic structure

B.C.C. crystalline structure

H.C.P. structure

F.C.C. crystal structure

18. Hematite iron ore contains iron about

30%

45%

70%

55%

19. In low carbon steels, presence of small quantities of sulphur improves

Formability

Weldability

Hardenability

Machinability

20. The machinability of steel is improved by adding

Sulphur, lead and phosphorus

Nickel and chromium

Nickel

Chromium

Page 3 of 4

21. The coke in the charge of blast furnace

Acts as an iron bearing mineral

Supplies heat to reduce ore and melt the iron

Forms a slag by combining with impurities

Controls the grade of pig iron

22. Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio

50 : 20 : 20 : 10

40 : 30 : 20 : 10

30 : 20 : 30 : 20

50 : 20 : 10 : 20

23. Brass contains

70% copper and 30% zinc

70 - 75% copper and rest tin

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

90% copper and 10% tin

24. The percentage of carbon in grey iron castings usually varies between

2.5 to 4.5%

5 to 7%

1.2%

0.5 to 1%

25. The surface hardness of the following order is achieved by nitriding operation

600 VPN

250 VPN

1500 VPN

1000 to 1100 VPN

26. The unit cells

Have the same orientation and their similar faces are parallel

Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal

May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice

All of the above

27. Which is false statement about normalizing? Normalizing is done to

Improve mechanical properties

Induce stresses

Refine grain structure

Reduce segregation in casting

28. According to Indian standard specifications, plain carbon steel designated by 40 C8 means that the carbon content is

0.04%

0.6 to 0.8%

0.35 to 0.45%

0.4 to 0.6%

29. If a refractory contains high content of silicon, it means refractory is

Basic

Acidic

Brittle

Neutral

30. The main alloying elements high speed steel in order of increasing proportion are

Vanadium, chromium, tungsten

Tungsten, titanium, vanadium

Chromium, titanium, vanadium

Tungsten, chromium, titanium

Page 4 of 4

31. Points of arrest for iron correspond to

There is nothing like points of arrest

Stages at which allotropic forms change

Stages at which properties do not change with increase in temperature

Stages at which further heating does not increase temperature for some time

32. Large forgings, crank shafts, axles normally contain carbon up to

0.45 to 0.55%

0.20 to 0.45%

0.05 to 0.20%

0.55 to 1.0%

33. The tensile strength of wrought iron is maximum

None of the above

Uniform in all directions

Perpendicular to lines of slag distribution

Along the lines of slag distribution

34. In compression, a prism of brittle material will break

By forming a bulge

By crushing into thousands of pieces

By shearing along oblique plane

In direction perpendicular to application of load

35. Ductility of a material can be defined as

All of the above

Ability to recover its original form

Ability to undergo large permanent deformations in tension

Ability to undergo large permanent deformations in compression

36. The defect which takes place due to imperfect packing of atoms during crystallization is known as

None of these

Line defect

Surface defect

Point defect

37. The usual composition of a soldering alloy is

Tin and lead

Tin, lead and silver

Tin and copper

Tin, lead and small percentage of antimony

38. The aluminium alloy made by melting aluminium with 2 to 10% magnesium and 1.75% copper is called

Duralumin

Hindalium

Magnalium

Y-alloy

39. The ability of a material to resist fracture due to high impact loads, is called

Brittleness

Strength

Toughness

Stiffness

40. Which of the following metal shrinks most from molten state to solid state?

Admiralty metal

Cast steel

Brass

Cast iron

Loading...

Share this Now with Friends:

WhatsApp
Telegram
More

Related

Tags: Engineering Materials Mechanical Engineering

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.

Leave a ReplyCancel reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Ads by Google

Recent Posts

Key Benefits of Phd in any Discipline
[PDF] Basic Civil Engineering and Mechanics Available Online in PDF by S.S. Bhavikatti
Best 20 trending Topics for final year major projects in Civil Engineering
Explain different types of road bridges through neat sketches
What are the best video editing softwares
Explain the working of marshalling yard through neat diagram
Classification of Indian Railways in detail
What do you mean by coning of wheels? Also discuss its advantages.

Membership Registration

Secured Payment

Protection

DMCA.com Protection Status

VideRime.com is the leading online Learning portal. ©2026 All Rights Reserved.

Login Now

Google

OR

* Username

*

* Password

*

Remember me

Forgot Password

Don't have account? Register Now

VideRime Registration Form

* Username

*

* Username

*

* Last Name

*

* Email Address

*

* Confirm Email Address

*

* Password

*

Strength: Very Weak

(Use Cropper to set image and
use mouse scroller for zoom image.)

Already have an account? Login