1. Which of the following is true about yield strength A. It is well approximate

Question

1.     Which of the following is true about yield strength

A.   It is well approximated for most materials by E/10

B.    In metallic materials, it occurs by the movement of dislocations due to shear forces

C.    It can be increased by increasing the grain size

D.   It is greater numerically than the shear strength

2.     Stress concentrations are most severe when

3.     Fracture toughness

4.     Fatigue occurs

5.     Examples of fail-safe design include

A.   Load-limited design

B.    Leak before break

C.    Twist before break

D.   Yield before break

Explanation / Answer

c

d

b

a

c

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