Question Category: Civil Engineering

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For a given discharge, the efficiency of sedimentation tank can be increased by 
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Disinfection of water results in
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Ground water is usually free from
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The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about
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The maximum permissible limit for fluoride in drinking water is
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Standard EDTA ( ethylene diamine tetra acetic acid ) solution is used to determine the
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The most common cause of acidity in water is
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Orthotolidine test is used for determination of 
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The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of
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On standard silica scale, the turbidity in drinking water should be limited to
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