EGR 283 Quiz #2 Solution


1. By how much will a structural steel rod of diameter 10 mm and length 60 cm elongate if it is subjected to an axial force of 2 kN?  Give your answer in mm. 0.0764 mm
2. Which two properties must be equal for the rod and tube of Example 2.02? length &
deformation
3. What is the name of the method for which we temporarily remove one of the reactions and replace it later in the solution? superposition
4. Under load, a wire's cross sectional area decreases from a no-load value of 0.785 mm2 to 0.713 mm2.  Determine its ductility. 9.17 %
5. True or False?  The difference between engineering stress and true stress becomes apparent in ductile materials after yield has begun. (circle one) True