A. A sewer drops from a height
B. A branch sewer joins the main sewer at higher level
C. A lamp is inserted to check obstruction
D. None of these
Correct Answer: A branch sewer joins the main sewer at higher level ✔
Last Updated: August 25, 2020
A. A sewer drops from a height
B. A branch sewer joins the main sewer at higher level
C. A lamp is inserted to check obstruction
D. None of these
Correct Answer: A branch sewer joins the main sewer at higher level ✔
Last Updated: August 25, 2020