Mechanical Behaviour and Testing of Materials Mock Test 3

10%

Question 1 of 10

1. Inclusions don’t affect formability of materials.

False

True

Question 1 of 10

Question 2 of 10

2. The nature of force between dislocations depends on the relative position of dislocations.

False

True

Question 2 of 10

Question 3 of 10

3. What is the slip direction in BCC crystal structure?

<1120>

<111>

<110>

<101>

Question 3 of 10

Question 4 of 10

4. What is the strength of the Burgers vector for dislocations in BCC structure?

3a/√2

a/3

a/√2

a√3/2

Question 4 of 10

Question 5 of 10

5. What is the value of lankford coefficient (r) for good deep drawable material?

≤ 2

≤ 1

≤ 4

≤ 3

Question 5 of 10

Question 6 of 10

6. Resolved shear stress is given as τ = ______

σ cosφ cosλ

σ sinφ sinλ

σ sinφ cosλ

σ cosφ sinλ

Question 6 of 10

Question 7 of 10

7. Match the following?

i) Conservative motion	p) Slip plane {111}
ii) Non-conservative motion	q) Slip plane {110}
iii) BCC crystals	r) Climb
iv) FCC crystals	s) Glide

i-s, ii-r, iii-p, iv-q

i-r, ii-s, iii-q, iv-p

i-r, ii-s, iii-p, iv-q

i-s, ii-r, iii-q, iv-p

Question 7 of 10

Question 8 of 10

8. Mechanical properties of single phase alloys cannot be improved by ____________

Grain refining

Cold working

Heat treatment

Thermomechanical treatment

Question 8 of 10

Question 9 of 10

9. Relation E ∝ b² is known as ______

Frank’s rule

Bauschinger effect

Burgers law

Griffith law

Question 9 of 10

Question 10 of 10

10. The pair of partial dislocations along with stacking fault region is called ______ dislocation.

Frank partial

Unit

Extended

Lomer-Cottrell

Question 10 of 10