Environmental Engineering Alum as a coagulant is found to be most effective when pH range of water is 4 to 6 6 to 8 8 to 10 2 to 4 4 to 6 6 to 8 8 to 10 2 to 4 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering As compared to higher pH values, the contact period required for efficient chlorination at lower pH values is Larger None of these Smaller Same Larger None of these Smaller Same ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The maximum permissible limit for fluoride in drinking water is 10 mg/liter 1.5 mg/liter 5 mg/liter 0.1 mg/liter 10 mg/liter 1.5 mg/liter 5 mg/liter 0.1 mg/liter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The commonly used material for water supply pipes, which has the properties of being strong, not easily corroded and long life but is heavy and brittle, is Steel Copper Reinforced cement concrete Cast iron Steel Copper Reinforced cement concrete Cast iron ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The means of access for inspection and cleaning of sewer line is known as Inlet Catch basin Manhole Drop manhole Inlet Catch basin Manhole Drop manhole ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering For a country like India, where rainfall is mainly confined to one season, the suitable sewerage system will be Separate system Partially combined system Combined system Partially separate system Separate system Partially combined system Combined system Partially separate system ANSWER DOWNLOAD EXAMIANS APP
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