Gear Institute

Login

ยท

ยท

Material Science MCQ Set 10

เคนเคฐ Government Jobs เค•เฅ€ update เค•เฅ‡ เคฒเคฟเค เคœเฅเคกเคผเฅ‡เค‚

JOIN WHATS APP GROUPCLICK HERE
JOIN TELEGRAM GROUPCLICK HERE
SUBSCRIBE YOUTUBE CHANNELCLICK HERE
image_printDownload this pdf

MATERIAL SCIENCE MCQ SET 10

Q1. Which property measures a materialโ€™s resistance to impact?

A) Hardness
B) Toughness
C) Ductility
D) Strength

Show Answer

Answer: B) Toughness
Explanation: Toughness is measured using Charpy or Izod impact tests.

Q2. Which of the following is a non-ferrous metal?

A) Steel
B) Aluminum
C) Cast iron
D) Wrought iron

Show Answer

Answer: B) Aluminum
Explanation: Non-ferrous metals do not contain significant iron content.

Q3. The cooling curve of steel is used to determine:

A) Hardness
B) Phase transformations
C) Density
D) Thermal conductivity

Show Answer

Answer: B) Phase transformations
Explanation: Cooling curves show transformations like pearlite, bainite, and martensite.

Q4. White cast iron is hard because it contains:

A) Graphite
B) Cementite
C) Ferrite
D) Austenite

Show Answer

Answer: B) Cementite
Explanation: Cementite (Feโ‚ƒC) is hard and brittle, giving white cast iron its hardness.

Q5. Which metal has HCP structure and is lightweight?

A) Magnesium
B) Iron
C) Copper
D) Aluminum

Show Answer

Answer: A) Magnesium
Explanation: Magnesium is HCP, low density, and used in lightweight alloys.

Q6. Which of the following increases wear resistance?

A) Annealing
B) Carburization
C) Softening
D) Normalizing

Show Answer

Answer: B) Carburization
Explanation: Carbon-rich surfaces formed during carburization resist wear.

Q7. Precipitation hardening is mainly used in:

A) Ferrous alloys
B) Aluminum alloys
C) Ceramics
D) Polymers

Show Answer

Answer: B) Aluminum alloys
Explanation: Fine precipitates obstruct dislocation motion, strengthening alloys.

Q8. The crystal structure of copper is:

A) BCC
B) FCC
C) HCP
D) Simple cubic

Show Answer

Answer: B) FCC
Explanation: Copper is FCC, giving high ductility and good electrical conductivity.

Q9. Nitriding increases:

A) Surface toughness
B) Surface hardness
C) Core hardness
D) Ductility

Show Answer

Answer: B) Surface hardness
Explanation: Nitrogen forms hard nitrides, strengthening the surface layer.

Q10. Thermosetting polymers:

A) Can be reshaped by heating
B) Cannot be reshaped once set
C) Are flexible like rubber
D) Are metallic

Show Answer

Answer: B) Cannot be reshaped once set
Explanation: Thermosets form permanent chemical bonds and retain shape on heating.

Recent Posts

Go back

Your message has been sent

Share this post and help your Friends

Leave a Reply

Your email address will not be published. Required fields are marked *

Disclaimer: Any information regarding examination forms, results/scores, answer keys published on this website is provided for the immediate information of the examinees only and should not be considered as a legal document. While the Gear Institute team has made every effort to ensure the accuracy of the information provided including the official links, we are not responsible for any inadvertent error that may appear in the examination results/grades, answer keys or admission schedule/dates. Also, we accept no liability for any loss or damage caused by any deficiency, defect or inaccuracy in the information available on this website. Please contact us through the Contact Us page if you require any correction.

Note: Gear Institute is not a Consultant and will never charge any candidates for Jobs. Please be aware of fraudulent calls or emails.

Top