Environmental Engineering Generally the detention period for grit chambers is kept as 12 hours 24 hours 1 minute 5 minutes 12 hours 24 hours 1 minute 5 minutes ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of 1 mg/liter 1000 mg/liter 100 mg/liter 10 mg/liter 1 mg/liter 1000 mg/liter 100 mg/liter 10 mg/liter ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The specific gravity of sewage is Slightly greater than 1 Much greater than 1 Equal to 1 Slightly less than 1 Slightly greater than 1 Much greater than 1 Equal to 1 Slightly less than 1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering If the coli form bacteria is present in a sample of water, then the coli-form test to be conducted is (i) Presumptive coli-form test (ii) Confirmed coli-form test (iii) Completed coli-form test Both (i) and (ii) Both (i) and (iii) Only (i) All (i), (ii) and (iii) Both (i) and (ii) Both (i) and (iii) Only (i) All (i), (ii) and (iii) ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is Reflux valve Pressure relief valve Sluice valve Air relief valve Reflux valve Pressure relief valve Sluice valve Air relief valve ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering For a given discharge, the efficiency of sedimentation tank can be increased by 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 Increasing the surface area of tank Decreasing the surface area of tank Decreasing the depth of tank ANSWER DOWNLOAD EXAMIANS APP
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