Drop manholes at the junctions of sewer lines, are provided if________________?

A. Two sewer lines intersect

B. Invert level of a branch sewer is more than 60 cm that of the main sewer

C. Ordinary manhole cannot be built

D. Sewer line runs along a main road

Found an error? Read our corrections policy and submit a sourced correction below. You can also share a useful explanation in your own words.

Discuss the answer or suggest a sourced correction
Thank you for contributing.
Your comment was submitted and will appear after editorial review.

Your email is used only for moderation and is never displayed. Spam, copied material and fabricated endorsements are rejected.