Mechanical Behaviour and Testing of Materials Mock Test 7

10%

Question 1 of 10

1. Cottrell atmosphere is a conceptual term of yield point phenomenon.

True

False

Question 1 of 10

Question 2 of 10

2. Creep rate is higher for α-iron than for ϒ-iron.

False

True

Question 2 of 10

Question 3 of 10

3. Which temperature is more important for alloys?

Melting temperature

Sub-zero temperature

Recrystallization temperature

Boiling temperature

Question 3 of 10

Question 4 of 10

4. Yield and flow strength at lower plastic strain is more dependent on _____ than ______

Strain rate, tensile strength

Strain rate, temperature

Temperature, tensile strength

Tensile strength, strain rate

Question 4 of 10

Question 5 of 10

5. The points on the true stress strain curve ______ the conventional stress strain curves up to the onset of necking.

May lie on left or right

Lie on the left of

Superimpose

Lie on the right of

Question 5 of 10

Question 6 of 10

6. Which of the following term will be seen in the plastic zone?

Fracture point

Elastic limit

Proportional limit

Yield point

Question 6 of 10

Question 7 of 10

7. The elongation that occurs at constant load is called ____

Yield point elongation

Homogeneous elongation

Constant elongation

Elastic elongation

Question 7 of 10

Question 8 of 10

8. True strain is ____ than the engineering strain corresponding to a given load.

Larger

Either smaller or equal

Equal

Smaller

Question 8 of 10

Question 9 of 10

9. Viscous creep is represented by _________ constant in Andrade empirical equation.

Question 9 of 10

Question 10 of 10

10. Elastic modulus and strength ____ and ductility ___ as the temperature of material increases.

Decreases, decreases

Increases, decreases

Increases, increases

Decreases, increases

Question 10 of 10