Mechanical Behaviour and Testing of Materials Mock Test 1

10%

Question 1 of 10

1. Dislocations are responsible for ________________

Don’t affect strength of metal

Increase or decrease in strength depending on dislocation density

Increase in strength

Decrease in strength

Question 1 of 10

Question 2 of 10

2. c/a ratio for HCP is _____________

0.74

1.633

0.816

1.05

Question 2 of 10

Question 3 of 10

3. Which one is not an example of interstitial impurity?

Hydrogen in Palladium

Nitrogen in iron

Zinc in brass

Carbon in iron

Question 3 of 10

Question 4 of 10

4. Substitutional atoms are generally close in size (approximately 15%) to the parent metal atoms.

True

False

Question 4 of 10

Question 5 of 10

5. Most crystalline materials have dislocations in their as formed state.

False

True

Question 5 of 10

Question 6 of 10

6. What causes blow holes in casting?

Insufficient permeability

Soft ramming

Risering system

Venting

Question 6 of 10

Question 7 of 10

7. Tensile strength increases with increasing ______

Purity

Temperature

Grain size

Molecular weight

Question 7 of 10

Question 8 of 10

8. Which one of the following factor does not favour void formation?

Low ageing temperature

Presence of gas

High ageing temperature

Slow quenching rates

Question 8 of 10

Question 9 of 10

9. Which metals have an FCC crystal structure?

Cu, Pt, Ag

Au, Os, Hg

As, Sb, Bi

Mo, Nb, Rb

Question 9 of 10

Question 10 of 10

10. The ability of a material to undergo plastic deformation without fracture when subjected to uniaxial tensile force is ___

Ductility

Malleability

Yield Strength

Tensile Strength

Question 10 of 10