What is the logical extension of the pit privy ?
- ASeptic tank and tile fieldCorrect
- BComposting toilet
- CSeepage pits
- DPlastic pipe with holes
Solution
Concept
Evolution of on-site sanitation systems
Step-by-step solution
1. A pit privy is a dry system where excreta fall into a pit. 2. The next step in sophistication, with water flushing, is the septic tank with a soil absorption (tile) field.
Explanation
A septic tank with a tile field is the water-carried on-site system that logically follows the pit privy.
Why the other options are wrong
Composting toilets, seepage pits and perforated pipes are other on-site components or alternatives, not the logical extension.
Shortcut
Pit privy → septic tank + tile field.
Correct answer: A) Septic tank and tile field