Material Science Objective Questions

These Material Science Objective Questions are very important for the competitive exams like SSC JE, RRB, GATE, ISRO, DRDO, and all other competitive exams.

All these Material Science Objective Questions are from the previous years’ papers of one of the exams mentioned before.

Read More- Fluid Mechanics: Objective Questions

1. Eutectoid reaction occurs at-

A. 114 °C

B. 600 °C

C. 727 °C

D. 1493 °C

Click for Answer/Explanation

Correct Answer is C

2. Machines tool guide-ways are usually hardness by-

A. Mar-tempering

B. Flame hardening

C. vacuum hardening

D. induction hardening

Click for Answer/Explanation

Correct Answer is B

3. 18/8 stainless steel contains-

A. 18% nickel & 8% chromium

B. 18% chromium & 8% nickel

C. 18% tungsten & 8% chromium

D. 18% stainless & 8% chromium

Click for Answer/Explanation

Correct Answer is B

It is also called Austentic stainless steel and is magnetic in nature.

4. Which one of the following features improve the fatigue strength of a metallic material-

A. Increasing the temperature

B. Scratching the surface

C. Over stressing

D. Under stressing

Click for Answer/Explanation

Correct Answer is D

Under compressive stress, fatigue life is improved.

5. Gibbs phase rule is given by-

A. F = C + P

B. F = C – P + 2

C. F = C + P – 2

D. F = C – P – 2

Click for Answer/Explanation

Correct Answer is B

P + F = C + 2

where,

P = N0. of Phase

F = No. of the degree of freedom

C = No. of components

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