Consider the following statements : The salient features of a bar chart over network are that : 1. It is simple to draw and easy to understand. 2. It is unable to depict interdependence of activities. 3. It clearly distinguishes between critical and non-critical activities. 4. It is not possible to crash activities to get optimum and minimum duration of the project. Which of the following statements given above are correct ?
An open channel carrying super critical flow is provided with a smooth expansion along the direction of flow. When no other considerations interfere, then the water surface.