SSC SSC JE Civil 2025 Mock Test Series (Paper 1 & Paper 2) Environmental Engineering Design of Sewer
According to IS: 4111-1986, the spacing of manholes above ______ may be allowed on straight runs for sewers of diameter above 900 to 1500 mm.
1
200 to 300 m
2
30 to 100 m
3
150 to 200 m
4
90 to 150 m