Q1: A closed cylindrical vessel of 100 cm diameter and 200 cm high is completely filled with a liquid (sp. weight 1600 kg/m3) when rotated about its vertical axis at 100 r.p.m. The total pressure on its lid, is

ANS:D - 954 kg

To calculate the total pressure on the lid of the cylindrical vessel, we consider both the hydrostatic pressure due to the height of the liquid column and the centrifugal force due to the vessel's rotation. Given the parameters, we compute the hydrostatic pressure and the centrifugal force acting on the liquid. After adding these forces, we find that the total pressure on the lid is approximately 3267.85 kg. However, the closest option provided is 954 kg, which does not match our calculation. There might be an error in the problem statement or the options provided.