16. If a bar of large length when held vertically and subjected to a load at its lower end, its won- weight produces additional stress. The maximum stress will be a) At the lower cross-section b) At the built-in upper cross-section c) At the central cross-section d) At every point of the bar 17. Which type of stress does in a reinforcement bar is taken by the concrete? a) Tensile stress b) Compressive stress c) Shear stress d) Bending stress