Q1: The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is

ANS:C - 45 m

The maximum spacing of manholes specified by Indian standards in sewers up to 0.3 m diameter is 30 m. Manholes serve as access points for maintenance and inspection of sewer lines. They are strategically placed along the sewer line to facilitate cleaning, repairs, and monitoring of the system. The spacing between manholes is determined based on factors such as the diameter of the sewer pipe, the slope of the sewer line, and local regulations or standards. In the case of sewers with smaller diameters, such as those up to 0.3 m, the maximum spacing of manholes is typically set at 30 m according to Indian standards. This spacing ensures adequate access for maintenance personnel while maintaining the integrity and functionality of the sewer system.