<prompt> The amount of sewage flowing in a system in 24 hrs is called:Sewage rateDry weather flowRCA indexSludge  <response>: Sewage: is waste water from a community, containing solid and liquid excreta, derived from houses, street and yard washings, factories and industries Composition of sewage: 99.9 water 0.1 solids organic inorganic Dry weather flow : is the average amount of sewage that flows in sewerage system in 24 hrs Strengths of sewage is expressed in terms of: Biological oxygen demand BOD, Chemical oxygen demand COD, Suspended solids. 