Environmental Engineering The maximum permissible limit for fluoride in drinking water is 1.5 mg/liter 0.1 mg/liter 10 mg/liter 5 mg/liter 1.5 mg/liter 0.1 mg/liter 10 mg/liter 5 mg/liter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering For a given discharge, the efficiency of sedimentation tank can be increased by Increasing the surface area of tank Increasing the depth of tank Decreasing the depth of tank Decreasing the surface area of tank Increasing the surface area of tank Increasing the depth of tank Decreasing the depth of tank Decreasing the surface area of tank ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The polluted water is one which Is safe and suitable for drinking and domestic use Is contaminated Consists of undesirable substances rendering it unfit for drinking and domestic use Contains pathogenic bacteria Is safe and suitable for drinking and domestic use Is contaminated Consists of undesirable substances rendering it unfit for drinking and domestic use Contains pathogenic bacteria ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The working conditions in imhoff tanks are Anaerobic only Aerobic only Aerobic in lower compartment and anaerobic in upper compartment anaerobic in lower compartment and aerobic in upper compartment Anaerobic only Aerobic only Aerobic in lower compartment and anaerobic in upper compartment anaerobic in lower compartment and aerobic in upper compartment ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Which of the following retards the self purification of stream? Satisfying oxygen demand Higher temperature Sunlight None of these Satisfying oxygen demand Higher temperature Sunlight None of these ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The detention period in coagulation tanks is usually kept as 30 to 45 minutes 1 to 2 minutes 2 to 6 hours 2 to 6 days 30 to 45 minutes 1 to 2 minutes 2 to 6 hours 2 to 6 days ANSWER DOWNLOAD EXAMIANS APP
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