Sewerage Systems MCQ with answer and solution

Concept

Origin of sewerage system components

Formula

NONE

Step-by-step solution

1. Wastewater originates from plumbing fixtures located within individual buildings or homes. 2. House sewers collect wastewater from building plumbing and convey it to public lateral sewers. 3. Therefore, the sewerage system originates from the house sewer. Answer: C

Explanation

A municipal sewerage network begins at individual buildings where plumbing fixtures discharge wastewater into private house sewers. These house sewers convey sewage to lateral sewers under public roads, which then feed into main and outfall sewers heading toward the treatment facility.

Why the other options are wrong

A) An outfall sewer carries treated or raw sewage to the final point of disposal. B) A main sewer collects sewage from large areas and lateral sewers. D) A lateral sewer receives sewage directly from house sewers and carries it to main sewers.

Shortcut

Sewerage flow originates from the House sewer.

Common mistake

Confusing house sewers where wastewater collection originates with municipal lateral or main sewers.