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The leakage in a refrigeration system using ammonia is detected by
Ammonia leakage in the refrigeration system is detected by
During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
Fine grit present in sewage is removed in the __________ during sewage treatment.
__________ substances present in sewage are removed in grit chamber during sewage treatment.
Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is?
Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is
Which of the following pumps is used to pump sewage solids with liquid sewage without clogging the pump is?
Fertiliser plant making ammonium sulphate employing gypsum-ammonia reaction (usual practice is to use ammonia and sulphuric acid) is located at
To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of