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

Stiffness

Strength

Toughness

Brittleness

2. Ductility of a material can be defined as

Ability to recover its original form

Ability to undergo large permanent deformations in compression

Ability to undergo large permanent deformations in tension

All of the above

3. Brass contains

70 - 75% copper and rest tin

70% copper and 30% zinc

90% copper and 10% tin

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

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

0.05 to 0.20%

0.20 to 0.45%

0.55 to 1.0%

0.45 to 0.55%

5. The hardness of steel primarily depends on

Percentage of alloying elements

Shape of carbides and their distribution in iron

Percentage of carbon

Heat treatment employed

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

Improve mechanical properties

Induce stresses

Reduce segregation in casting

Refine grain structure

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

600 VPN

1000 to 1100 VPN

1500 VPN

250 VPN

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

Hardenability

Formability

Machinability

Weldability

9. Cobalt in steel

Improves wear resistance, cutting ability and toughness

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 cutting ability and reduce hardenability

10. The usual composition of a soldering alloy is

Tin and copper

Tin, lead and silver

Tin and lead

Tin, lead and small percentage of antimony

Page 2 of 4

11. The machinability of steel is improved by adding

Nickel and chromium

Sulphur, lead and phosphorus

Chromium

Nickel

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

Alpha iron, beta iron and gamma iron

Body centered cubic iron and face centered cubic iron

Alpha iron and beta iron

Alpha iron, gamma iron and delta iron

13. Hematite iron ore contains iron about

70%

55%

45%

30%

14. Points of arrest for iron correspond to

There is nothing like points of arrest

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

Stages at which allotropic forms change

Stages at which properties do not change with increase in temperature

15. Corundum contains more than 95%

MgO

SiO₂

Steel

Al₂O₃

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

Tungsten, titanium, vanadium

Tungsten, chromium, titanium

Vanadium, chromium, tungsten

Chromium, titanium, vanadium

17. The coke in the charge of blast furnace

Controls the grade of pig iron

Acts as an iron bearing mineral

Supplies heat to reduce ore and melt the iron

Forms a slag by combining with impurities

18. There are fourteen atoms in a unit cell of

None of these

Close packed hexagonal space lattice

Face centered cubic space lattice

Body centered cubic space lattice

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

Cast steel

Brass

Cast iron

Admiralty metal

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

Acidic

Brittle

Neutral

Basic

Page 3 of 4

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

Brittleness

Stiffness

Toughness

Strength

22. Cementite consist of

13% carbon and 87% ferrite

13% cementite and 87% ferrite

13% ferrite and 87% cementite

6.67% carbon and 93.33% iron

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

Point defect

Surface defect

None of these

Line defect

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

Y-alloy

Duralumin

Magnalium

Hindalium

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

Malleability

Elasticity

Plasticity

Ductility

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

0.04%

0.4 to 0.6%

0.6 to 0.8%

0.35 to 0.45%

27. Gamma-iron occurs between the temperature ranges of

400°C to 600°C

1400°C to 1530°C

600°C to 900°C

900°C to 1400°C

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

It has good machining properties

It is prone to age hardening

It is lighter than pure aluminium

It can be forged

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

Plasticity

Ductility

Brittleness

Malleability

30. Taps dies and drills contain carbon

Below 0.5%

Above 1%

Below 1%

Above 2.2%

Page 4 of 4

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

Hearth

Throat

Stack

Bosh

32. Tungsten 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

33. The tensile strength of wrought iron is maximum

Along the lines of slag distribution

Perpendicular to lines of slag distribution

Uniform in all directions

None of the above

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

By crushing into thousands of pieces

In direction perpendicular to application of load

By forming a bulge

By shearing along oblique plane

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

Phosphor bronze

Silicon bronze

Monel metal

White metal

36. 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%

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

50 : 20 : 10 : 20

50 : 20 : 20 : 10

40 : 30 : 20 : 10

30 : 20 : 30 : 20

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

Copper

Silicon

Nickel

Chromium

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

H.C.P. structure

F.C.C. crystal structure

A complex cubic structure

B.C.C. crystalline structure

40. The unit cells

All of the above

Have the same orientation and their similar faces are parallel

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

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

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

Comprehensive 100 MCQs based on Surveying in Civil Engineering with answer keys
Comprehensive 100-question multiple-choice bank on Concrete Technology, complete with answer keys
Discuss about concrete and its nominal proportions?
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

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