Civil Engineering - Estimating and Costing - Discussion

Discussion Forum : Estimating and Costing - Section 2 (Q.No. 24)
24.
Pick up the correct statement from the following:
In a gully trap, a water seal of 6 to 7.5 cm is provided
The gully trap collects waste water from the kitchen, sink, wash basins, etc.
The gully trap disconnects the sullage drain from the main drainage system
The grating provided over gully traps is 23 cm square.
Answer: Option
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