Q. According to The United States Geological Survey, water having less than 1000 ml/litre of total dissolved solids is Fresh water Slightly saline Moderately saline Brine water Answer: Fresh water
Q. In filtration, the amount of dissolved solids passing through the filters is Difference between total solids and suspended solids Sum of total solids and suspended solids Independent of suspended solids None of the above Answer: Difference between total solids and suspended solids
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Q. Step of sewage water treatment in which there is some aeration and organic material is converted to inorganic materials is called Primary sewage treatment Secondary sewage treatment Activated sludge treatment Chlorination Answer: Secondary sewage treatment
Q. What is second step of raw water treatment? Sedimentation Coagulation Filtration Chlorination Answer: Coagulation
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Q. What is first step of raw water treatment? Chlorination Filtration Coagulation Sedimentation Answer: Sedimentation
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Q. A technique used to determine the concentration of odour compounds in a sample is known as Chlorination Flushing Settling Stripping Answer: Stripping
Q. The water temperature should preferably be less than __ degree Celsius 10 15 25 30 Answer: 25
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Q. Monitoring systems can be carried out by using __________ Motors Automatic sensors Automatic motors Turbines Answer: Automatic motors
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Q. ____________ comes under the chemical monitoring of the lake. Detergents Pathogens Turbidity Conductivity Answer: Detergents
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Q. Pollution enters into the water system in ___________ ways. 4 3 2 1 Answer: 4
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