Mechanical Metallurgy Mock Test 4

10%

Question 1 of 10

1. The highest strain value is obtained at ___________

elastic limit

yield point

propositional limit

true elastic limit

Question 1 of 10

Question 2 of 10

2. The FCC material’s usual mode of fracture is necked down to a point before rupture.

True

False

Question 2 of 10

Question 3 of 10

3. The following curve is the plot of the percentage of cold work in the sample with various properties. Which of the following combination of the properties to their given values is correct?

A-Tensile Strength, B-Ductility, C-Yield Strength

A-Tensile Strength, B- Yield Strength, C-Ductility

A-Ductility, B-Tensile Strength, C- Yield Strength

A-Ductility, B-Yield strength, C-Tensile Strength

Question 3 of 10

Question 4 of 10

4. As the carbon content of the steel increases, the hardness of steel __________ on quenching.

remains constant

increases

decreases

no relation

Question 4 of 10

Question 5 of 10

5. In which crystal the strain hardening will be least?

BCT

BCC

HCP

FCC

Question 5 of 10

Question 6 of 10

6. What does Region A represent in the following time-temperature transformation diagram (TTT)?

Austenite

Pearlite

Martensite

Bainite

Question 6 of 10

Question 7 of 10

7. Which of the two curves will have the same shape?

Engineering stress-strain and true stress-strain

Load-elongation and true stress-strain

Uniaxial tension and uniaxial torsion

Load-elongation and engineering stress-strain

Question 7 of 10

Question 8 of 10

8. In the ductile material the necking begins, at the point where ________________

increased strain hardening cross the yield point

increased strain hardening fails to compensate for the decrease in the cross-section area

the decrease cross-sectional area reaches half the initial cross-sectional area

the decrease cross-sectional area reaches one-fourth of the initial cross-sectional area

Question 8 of 10

Question 9 of 10

9. During plastic deformation, the percentage of energy which is retained by lattice, in the form of lattice strain or other method is roughly equal to__________

50%

90%

10%

Question 9 of 10

Question 10 of 10

10. What is the temperature over which ductile material converts into a brittle material?

50°

100°

10°

2°

Question 10 of 10