The manhole in which inclined pipe for transfer of sewage from branch to main sewer is __________
(a) Deep manhole
(b) Ramp
(c) Drop manhole
(d) Normal manhole
The question was asked in an online quiz.
The origin of the question is Devices Associated with Sewer topic in portion Construction of Sewers, Sewer Appurtenances and Sewage Pumping of Environmental Engineering