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-6

May 13, 2021

Show paginator

Hide paginator

25%

Page 1 of 4

1. In mottled cast iron, carbon is available in

Combined form

Partly in free and partly in combined state

Free form

Nodular form

2. The crystal structure of gamma iron is

Cubic structure

Body centered cubic

Hexagonal close packed

Face centered cubic

3. In induction hardening ________ is high.

Voltage

Current

Frequency

Temperature

4. Grey cast iron has

Carbon in the form of free graphite

All of these

High tensile strength

Low compressive strength

5. An important property of malleable cast iron in comparison to grey cast iron is the high

Ductility

Compressive strength

Hardness

Carbon content

6. Gamma iron exits at following temperature

Between 1400°C and 1539°C

Between 910°C and 1400°C

Room temperature

Near melting point

7. Iron is

Paramagnetic

Ferroelectric

Dielectric

Ferromagnetic

8. Carbon steel is

Refined from cast iron

Made by adding carbon in steel

An alloy of iron and carbon with varying quantities of phosphorus and sulphur

Extensively used for making cutting tools

9. The crystal of alpha iron is

Body centered cubic

Face centered cubic

Hexagonal close packed

Cubic structure

10. The following types of materials are usually the most ductile

All of the above

Body centered cubic lattice

Hexagonal close packed lattice

Face centered cubic lattice

Page 2 of 4

11. The lower critical temperature

Decreases as the carbon content in steel increases

Is same for all steels

Depends upon the rate of heating

Increases as the carbon content in steel increases

12. Annealing of white cast iron results in production of

Spheroidal iron

Malleable iron

Nodular iron

Grey iron

13. When the steel is normalized, its

Ultimate tensile strength increases

Yield point increases

Ductility decreases

All of these

14. Manganese is added in low carbon steel to

Raise the yield point

Make the steel ductile and of good bending qualities

Make the steel tougher and harder

All of the above

15. Wrought iron is

High in strength

Highly resistant to corrosion

Heat treated to change its properties

Hard

16. In grey cast iron, carbon is present in the form of

Cementite

Free carbon

Flakes

Spheroids

17. Chilled cast iron has

A very high percentage of graphite

A low percentage of graphite

No graphite

Graphite as its basic constituent of composition

18. The unique property of cast iron is its high

Ductility

Malleability

Damping characteristics

Surface finish

19. Induction hardening is basically a

Carburising process

Surface hardening process

Core hardening process

None of these

20. Cast iron is characterized by minimum of following percentage of carbon

0.2%

2%

0.8%

1.3%

Page 3 of 4

21. Chromium when added to steel _________ the tensile strength.

Does not effect

Increases

None of these

Decreases

22. 'Killed steels' are those steels

Which are destroyed by burning

Which after their destruction are recycled to produce fresh steel

In which carbon is completely burnt

Which are deoxidized in the ladle with silicon and aluminium

23. Combined carbon in iron makes the metal

Hard and gives a fine grained crystalline structure

Soft and gives a fine grained crystalline structure

Hard and gives a coarse grained crystalline structure

Soft and gives coarse grained crystalline structure

24. Cast iron has

Its elastic limit close to the ultimate breaking strength

All of the above

High tensile strength

High ductility

25. Sulphur in pig iron tends to make it

Tough

Hard

Ductile

Soft

26. Which of the following statements are true for annealing of steels?

Cooling is done slowly and steadily

All of these

Steels are heated to 500 to 700°C

Internal stresses are relieved

27. In nodular iron, graphite is in the form of

Free carbon

Flakes

Cementite

Spheroids

28. In malleable iron, carbon is present in the form of

Cementite

Free carbon

Flakes

Nodular aggregates of graphite

29. Pure iron is the structure of

Pearlite

Austenite

Ferrite

Ferrite and cementite

30. Steel containing ferrite and pearlite is

Tough

Hard and tough

Hard

Soft

Page 4 of 4

31. Malleable cast iron is produced

From white cast iron by annealing process

None of these

By quick cooling of molten cast iron

By adding magnesium to molten cast iron

32. Pick up wrong statement about wrought iron

It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling

It melts at 1535°C

It contains carbon of the order of 0 to 0.25%

It is very soft and ductile

33. The alloying element which can replace tungsten in high speed steels is

Cobalt

Vanadium

Molybdenum

Nickel

34. The purpose of heat treatment is to

Relieve the stresses set up in the material after hot or cold working

Any one of these

Modify the structure of the material

Change grain size

35. In high speed steels, manganese is used to tougher the metal and to increase its

Critical temperature

Hardness

Melting point

Yield point

36. Nodular cast iron is produced by adding ________ to the molten cast iron.

Magnesium

Chromium

Copper

Nickel

37. Which of the following is an amorphous material?

Silver

Mica

Lead

Glass

38. Monel metal is an alloy of

Copper and chromium

Nickel, Chromium and iron

Nickel and copper

Nickel and chromium

39. The metal suitable for bearings subjected to light loads, is

White metal

Silicon bronze

Monel metal

Phosphor bronze

40. Paramagnetic alpha iron changes to gamma iron at

1539°C

770°C

1440°C

910°C

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