Mechanical Behaviour and Testing of Materials Mock Test 2

10%

Question 1 of 10

1. What is the hardness of silicon carbides?

5-10 HV

10-14 HV

20-30 HV

15-20 HV

Question 1 of 10

Question 2 of 10

2. _____ occurs when metal is subjected to a constant tensile load at an elevated temperature?

Impact

Fatigue

Creep

Wear

Question 2 of 10

Question 3 of 10

3. The hardness of martensite ______ with an increase in carbon content.

Increases

Decreases

Remains constant

First increases and then decreases

Question 3 of 10

Question 4 of 10

4. Moisture absorption causes ___ in impact strength and ___ in the strength of polymers.

Decrease, decrease

Increase, decrease

Increase, Increase

Decrease, Increase

Question 4 of 10

Question 5 of 10

5. The toughness of material depends on _____ and _____ of material.

Ductility, tensile strength

Hardness, yield strength

Ductility, yield strength

Stiffness, tensile strength

Question 5 of 10

Question 6 of 10

6. A stiff material is always of high strength.

True

False

Question 6 of 10

Question 7 of 10

7. Neutron irradiation by neutrons can ___ yield stress and ___ ductility.

Decrease, decrease

Decrease, increase

Increase, increase

Increase, decrease

Question 7 of 10

Question 8 of 10

8. What is the ductility of annealed Cu?

45%

35%

25%

40%

Question 8 of 10

Question 9 of 10

9. Cooling rate _____ with distance from the quenched end, and the hardness _____

Increases, increases

Decreases, increases

Increases, decreases

Decreases, decreases

Question 9 of 10

Question 10 of 10

10. A material has tensile strength 210 MPa, yield strength 117 MPa and fracture strain 0.45. What will be approximate value of toughness?

89.2 MJ/m³

67.4 MJ/m³

73.6 MJ/m³

54.8 MJ/m³

Question 10 of 10