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

30 : 20 : 30 : 20

40 : 30 : 20 : 10

50 : 20 : 20 : 10

50 : 20 : 10 : 20

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

1000 to 1100 VPN

250 VPN

1500 VPN

600 VPN

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

0.05 to 0.20%

0.45 to 0.55%

0.55 to 1.0%

0.20 to 0.45%

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

Chromium, titanium, vanadium

Tungsten, titanium, vanadium

Tungsten, chromium, titanium

Vanadium, chromium, tungsten

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

5 to 7%

0.5 to 1%

1.2%

2.5 to 4.5%

6. Gamma-iron occurs between the temperature ranges of

1400°C to 1530°C

900°C to 1400°C

600°C to 900°C

400°C to 600°C

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

Stack

Bosh

Hearth

Throat

8. Hematite iron ore contains iron about

70%

45%

55%

30%

9. Cobalt in steel

Improves wear resistance, cutting ability and toughness

Improves cutting ability and reduce hardenability

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

Gives ductility, toughness, tensile strength and anti corrosion property

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

It has good machining properties

It can be forged

It is prone to age hardening

It is lighter than pure aluminium

Page 2 of 4

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

H.C.P. structure

F.C.C. crystal structure

B.C.C. crystalline structure

A complex cubic structure

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

Alpha iron, beta iron and gamma iron

Alpha iron and beta iron

Alpha iron, gamma iron and delta iron

Body centered cubic iron and face centered cubic iron

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

Plasticity

Ductility

Elasticity

Malleability

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

Cast iron

Brass

Cast steel

Admiralty metal

15. 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

16. Cementite consist of

13% cementite and 87% ferrite

13% ferrite and 87% cementite

13% carbon and 87% ferrite

6.67% carbon and 93.33% iron

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

Silicon bronze

White metal

Phosphor bronze

Monel metal

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

Plasticity

Ductility

Malleability

Brittleness

19. There are fourteen atoms in a unit cell of

Face centered cubic space lattice

Close packed hexagonal space lattice

Body centered cubic space lattice

None of these

20. Points of arrest for iron correspond to

Stages at which properties do not change with increase in temperature

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

Stages at which allotropic forms change

There is nothing like points of arrest

Page 3 of 4

21. 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

22. The hardness of steel primarily depends on

Shape of carbides and their distribution in iron

Percentage of carbon

Percentage of alloying elements

Heat treatment employed

23. The coke in the charge of blast furnace

Forms a slag by combining with impurities

Controls the grade of pig iron

Acts as an iron bearing mineral

Supplies heat to reduce ore and melt the iron

24. Taps dies and drills contain carbon

Below 1%

Above 1%

Above 2.2%

Below 0.5%

25. The machinability of steel is improved by adding

Nickel

Chromium

Sulphur, lead and phosphorus

Nickel and chromium

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

Duralumin

Magnalium

Y-alloy

Hindalium

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

None of these

Point defect

Line defect

Surface defect

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

Brittle

Neutral

Basic

Acidic

29. Tungsten in steel

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

Improves wear resistance, cutting ability and toughness

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

Improves cutting ability and reduces hardenability

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

0.4 to 0.6%

0.35 to 0.45%

0.04%

0.6 to 0.8%

Page 4 of 4

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

In direction perpendicular to application of load

By shearing along oblique plane

By crushing into thousands of pieces

By forming a bulge

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

Hardenability

Weldability

Formability

Machinability

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

Reduce segregation in casting

Refine grain structure

Improve mechanical properties

Induce stresses

34. The tensile strength of wrought iron is maximum

None of the above

Uniform in all directions

Along the lines of slag distribution

Perpendicular to lines of slag distribution

35. 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

All of the above

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

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

Toughness

Brittleness

Stiffness

Strength

37. Ductility of a material can be defined as

Ability to undergo large permanent deformations in compression

All of the above

Ability to recover its original form

Ability to undergo large permanent deformations in tension

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

Silicon

Chromium

Nickel

Copper

39. Corundum contains more than 95%

Steel

Al₂O₃

SiO₂

MgO

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

Strength

Stiffness

Toughness

Brittleness

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 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