Environmental Engineering The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of 10 mg/liter 1000 mg/liter 100 mg/liter 1 mg/liter 10 mg/liter 1000 mg/liter 100 mg/liter 1 mg/liter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Dissolved oxygen in streams is Maximum at midnight Same throughout the day Minimum at noon Maximum at noon Maximum at midnight Same throughout the day Minimum at noon Maximum at noon ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The rate of Alteration of pressure filters is Less than that of slow sand filters Greater than that of rapid sand filters Equal to that of slow sand filters In between the filtration rate of slow sand filters and rapid sand filters Less than that of slow sand filters Greater than that of rapid sand filters Equal to that of slow sand filters In between the filtration rate of slow sand filters and rapid sand filters 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 Decreasing the surface area of tank Decreasing the depth of tank Increasing the depth of tank Increasing the surface area of tank Decreasing the surface area of tank Decreasing the depth of tank Increasing the depth of tank ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The disinfection efficiency of chlorine increases by (i) Decreasing the time of contact (ii) Decreasing the temperature of water (iii) Increasing the temperature of water Only (iii) Both (i) and (iii) Only (i) Both (i) and (ii) Only (iii) Both (i) and (iii) Only (i) Both (i) and (ii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering Which of the following compounds is widely used for algae control? Copper sulphate Sodium chloride Calcium chloride Sodium sulphate Copper sulphate Sodium chloride Calcium chloride Sodium sulphate ANSWER DOWNLOAD EXAMIANS APP
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