Inspection holes on the drains were provided at intervals. Give reason.
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Inspection holes are provided for monitoring, investigating and maintaining the drains in case of any blockage and are also used for their maintenance.
Explanation:
The concept of drainage system is as old as the Indus Valley Civilization. The people of that civilization had well maintained drainage system, with manholes/ inspection holes at regular intervals.
- Inspection holes were provided to check the drainage infrastructure for any fault, leakage, etc.
- The presence of inspection holes at various intervals made it easier to maintain the drainage system in a good and working condition at all times.
- And the occurrence of any fault or failure could be easily handled and solved through those inspection holes.
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