What is meant by soffit ?
- AThe system of pipes which conveys discharges in separate pipes to the drainage system
- BA pipe or conduit which is owned by a local authority for conveyance of the sewage
- CThe highest point of the interior of a sewer pipe at any cross sectionCorrect
- DThe horizontal pipe lay below the floor level or below basement to receive the discharge of soil or waste water
Solution
Concept
Soffit (obvert) of a sewer
Step-by-step solution
1. The invert is the lowest point of the inside of a sewer, and the soffit (obvert) is the highest point of its inside surface.
Explanation
Soffit is the crown of the interior of the pipe.
Why the other options are wrong
(a) describes a separate system, (b) a public sewer, and (d) a building drain.
Shortcut
Invert = lowest; soffit = highest.
Common mistake
Choosing the building drain.
Correct answer: C) The highest point of the interior of a sewer pipe at any cross section