Mechanical Behaviour and Testing of Materials Mock Test 5

10%

Question 1 of 10

1. What is the concentration of particles by volume in dispersion strengthened composites?

15-20%

1 – 15%

Less than 1%

25-30%

Question 1 of 10

Question 2 of 10

2. The degree of crystallinity doesn’t exceed ___________ in polymers.

10%

80%

30%

60%

Question 2 of 10

Question 3 of 10

3. The number of dislocations is directly proportional to ___ and inversely proportional to ___

Stress, Shear modulus

Shear modulus, Stress

Burgers vector, Stress

Shear modulus, Burgers vector

Question 3 of 10

Question 4 of 10

4. What term is used for the temperature at which the strength of grain boundary and strength of grain is equal?

Curie temperature

Recrystallization temperature

Equicohesive temperature

Hardening temperature

Question 4 of 10

Question 5 of 10

5. the density of precipitated GP-zones is the order of ___

10¹⁸ cm^-3

10¹⁰ cm^-3

10¹² cm^-3

10¹⁶ cm^-3

Question 5 of 10

Question 6 of 10

6. Which property decreases on strain hardening?

Percent elongation

Elastic modulus

Yield strength

Hardness

Question 6 of 10

Question 7 of 10

7. Fibers for which l >> l_c are known as ____

Alligned

Discontinuous

Continues

Random

Question 7 of 10

Question 8 of 10

8. What favors strengthening by crystallinity?

Branching

Copolymerization

Cross linking

Trans type structure

Question 8 of 10

Question 9 of 10

9. Which alloying element enhances the Ms temperature?

Question 9 of 10

Question 10 of 10

10. Martensitic transformation is _____

Diffusion less

Second order transformation

Strain less

Long range diffusion of atoms

Question 10 of 10