Mechanical Behaviour and Testing of Materials Mock Test 9

10%

Question 1 of 10

1. In which technique ceramics are toughened by incorporation of second phase whiskers?

Transformation

Microcrack

Crack bridging

Crack deflection

Question 1 of 10

Question 2 of 10

2. Wood’s theory is described by _________

Microscopic slip bands

Grain boundaries

Weak crystal

Microscopic voids

Question 2 of 10

Question 3 of 10

3. Which material shows a gradual rising R-curve with failure governed by R-curve behaviour?

Low toughness / strength

High toughness / low strength

Low toughness and strength

High toughness and strength

Question 3 of 10

Question 4 of 10

4. Which element has a maximum effect on fatigue strength in steel?

Question 4 of 10

Question 5 of 10

5. Fatigue failure only occurs if cyclic stress, tensile stress and plastic strain, all are present.

False

True

Question 5 of 10

Question 6 of 10

6. What improves fatigue strength of the component?

Softening

Buffing

Electroplating

Indentation

Question 6 of 10

Question 7 of 10

7. What is the example of repeated stress cycle?

Rotating shafts

Machine carrying load

Axles

Cantilever

Question 7 of 10

Question 8 of 10

8. How many zones of failure are shown in car rear axle surface fracture?

Question 8 of 10

Question 9 of 10

9. Which materials show steeply rising R-curve?

Low toughness and strength

Low toughness / strength

High toughness / low strength

High toughness and strength

Question 9 of 10

Question 10 of 10

10. Which device is used to measure hardness in Mohs?

Gyro meter

Rockwell tester

Universal testing machine

Sclerometer

Question 10 of 10