Why are iron pipes layed down in the entrance of some main buildings?
N.Girija Sundaram, Erode, T.N. ANSWER: Iron pipes, which are layed down in the entrance of buildings serve as speed breakers’ ensuring smooth vehicular transit. It also acts as a barrier for preventing entry of cattle and other animals. It acts as a filter for trapping plastic covers. Such pipes are called cattle guards as they keep them away. B.Swamy Thayammal, Chennai, T.N.