Q1: A rain sanitary sewer is constructed to carry

ANS:B - storm sewage

A rain sanitary sewer, also known as a storm sewer, is designed to carry storm sewage, which primarily consists of excess rainwater and stormwater runoff from urban areas. During rainfall events, storm sewers collect rainwater from streets, parking lots, sidewalks, and other impermeable surfaces to prevent flooding and manage surface water runoff. Unlike sanitary sewers that carry domestic wastewater and sewage from homes and businesses, storm sewers are separate systems specifically engineered to handle stormwater management. They help prevent flooding by conveying stormwater away from urban areas and directing it to retention ponds, natural water bodies, or other stormwater management facilities. While storm sewers primarily handle stormwater runoff, they may also convey some surface water runoff, particularly during heavy rain events when water accumulates rapidly on the ground. However, storm sewers are not designed to handle sanitary sewage or groundwater. In summary, a rain sanitary sewer, or storm sewer, is constructed to carry storm sewage, primarily consisting of rainwater and stormwater runoff, to prevent flooding and manage surface water in urban areas.