Question

Inspection holes on the drains were provided at intervals. Give reason.

Answer 1

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.