Computer · Environmental Engineering
Which of the following specifications of a septic tank is INCORRECT?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A septic tank is constructed with a lining of dry brick or stone with open joints backed with at least 7.5 cm thick coarse aggregate.✓
- 2A septic tank is so designed that the sewage is retained in the tank for 24 hours and clear water flows out.
- 3A septic tank usually consists of brick walls in cement mortar not less than 20 cm thick and the foundation floor is of cement concrete.
- 4The floor should be given a slope of about 1 in 20 for the convenience of collection and removal of sludge.
Correct answer
A septic tank is constructed with a lining of dry brick or stone with open joints backed with at least 7.5 cm thick coarse aggregate.
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