To all mechanical engineers, I have two questions I cannot answer in my structural 4th year project. They are not structurally related, but more mechanical. Can anyone please help. Thanks. I don't know why the give structural engineers these questions at university? 1)A dredger has to pump sand to a height of 70m (cliff) above sea level firstly and from there another 5 km horizontally to an inland reclamation area. The inboard pumps of the dredger can provide just sufficient pressure to bring the material to the top of the cliff with the minimum required speed. What to do? Also think of the dynamics of the process. What details would you keep an eye on?After having pumped 50% of the required quantity, material starts to become coarser. What are the consequences? How to resolve? 2) You need to deliver a certain capacity (m3/s water). You have designed a pump and pipeline and you have submitted a plan. However, when the actual delivery has to start, the pipeline diameter is measured and it is found that it is 95% of what you had designed. How much additional pump pressure is required to deliver still the same capacity. How can you achieve that?