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A manhole is generally provided at each
A drop manhole is provided if
The drainage water intercepting the canal can be disposed of by passing the canal below the drainage in
A manhole is classified as shallow if its depth is between
If a paper moistened with lead acetate for five minutes when placed in manhole turns black. The sewer certainly contains
A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of
Lead acetate test in sewer manhole is done to test the presence of
Grey cast iron (used for making underground water pipes and manhole covers) as compared to steel has higher
A ship is berthed in a chamber and lifted by principles of buoyancy Such a chamber is called.
When a canal and a drainage approach each other at the same level, the structure so provided, is