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. Malleable cast iron is produced

None of these

By adding magnesium to molten cast iron

By quick cooling of molten cast iron

From white cast iron by annealing process

2. 'Killed steels' are those steels

Which are destroyed by burning

In which carbon is completely burnt

Which are deoxidized in the ladle with silicon and aluminium

Which after their destruction are recycled to produce fresh steel

3. Wrought iron is

Hard

Heat treated to change its properties

Highly resistant to corrosion

High in strength

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

1.3%

2%

0.8%

0.2%

5. The crystal structure of gamma iron is

Hexagonal close packed

Face centered cubic

Body centered cubic

Cubic structure

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

Flakes

Cementite

Spheroids

Free carbon

7. Induction hardening is basically a

Carburising process

None of these

Core hardening process

Surface hardening process

8. The purpose of heat treatment is to

Change grain size

Modify the structure of the material

Any one of these

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

9. Manganese is added in low carbon steel to

Raise the yield point

All of the above

Make the steel ductile and of good bending qualities

Make the steel tougher and harder

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

Molybdenum

Cobalt

Vanadium

Nickel

Page 2 of 4

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

Ductility

Compressive strength

Hardness

Carbon content

12. In mottled cast iron, carbon is available in

Partly in free and partly in combined state

Free form

Nodular form

Combined form

13. Carbon steel is

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

Extensively used for making cutting tools

Refined from cast iron

Made by adding carbon in steel

14. Which of the following is an amorphous material?

Mica

Silver

Lead

Glass

15. Pure iron is the structure of

Ferrite and cementite

Ferrite

Austenite

Pearlite

16. Chilled cast iron has

A low percentage of graphite

Graphite as its basic constituent of composition

No graphite

A very high percentage of graphite

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

Cementite

Spheroids

Free carbon

Flakes

18. 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 is very soft and ductile

It melts at 1535°C

It contains carbon of the order of 0 to 0.25%

19. Monel metal is an alloy of

Copper and chromium

Nickel, Chromium and iron

Nickel and chromium

Nickel and copper

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

None of these

Decreases

Does not effect

Increases

Page 3 of 4

21. The crystal of alpha iron is

Hexagonal close packed

Face centered cubic

Cubic structure

Body centered cubic

22. Combined carbon in iron makes the metal

Hard and gives a coarse grained crystalline structure

Hard and gives a fine grained crystalline structure

Soft and gives coarse grained crystalline structure

Soft and gives a fine grained crystalline structure

23. Grey cast iron has

Carbon in the form of free graphite

High tensile strength

Low compressive strength

All of these

24. Iron is

Dielectric

Paramagnetic

Ferroelectric

Ferromagnetic

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

Free carbon

Flakes

Cementite

Nodular aggregates of graphite

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

Hardness

Yield point

Critical temperature

Melting point

27. The unique property of cast iron is its high

Surface finish

Damping characteristics

Malleability

Ductility

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

Hexagonal close packed lattice

Face centered cubic lattice

All of the above

Body centered cubic lattice

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

Monel metal

Phosphor bronze

Silicon bronze

White metal

30. Sulphur in pig iron tends to make it

Hard

Ductile

Tough

Soft

Page 4 of 4

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

Internal stresses are relieved

Cooling is done slowly and steadily

Steels are heated to 500 to 700°C

All of these

32. When the steel is normalized, its

Ultimate tensile strength increases

Yield point increases

All of these

Ductility decreases

33. Cast iron has

High ductility

High tensile strength

Its elastic limit close to the ultimate breaking strength

All of the above

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

Magnesium

Chromium

Copper

Nickel

35. Paramagnetic alpha iron changes to gamma iron at

910°C

1440°C

770°C

1539°C

36. The lower critical temperature

Depends upon the rate of heating

Increases as the carbon content in steel increases

Decreases as the carbon content in steel increases

Is same for all steels

37. Gamma iron exits at following temperature

Between 1400°C and 1539°C

Room temperature

Near melting point

Between 910°C and 1400°C

38. In induction hardening ________ is high.

Frequency

Temperature

Current

Voltage

39. Annealing of white cast iron results in production of

Malleable iron

Spheroidal iron

Nodular iron

Grey iron

40. Steel containing ferrite and pearlite is

Hard and tough

Soft

Hard

Tough

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