For the COD test of sewage, organic matter is oxidised by K2Cr2O7 in the presence of________________?

Related Mcqs:

R.M.O. expenses include___________________?

A. Running expenses B. Maintenance expenses C. Operation expenses D. All the above...

Chlorination of water is done for the removal of____________________?

A. Bacterias B. Suspended solids C. Sediments D. Hardness...

The effluent of a septic tank is_________________?

A. Fit for discharge into any open drain B. Foul and contains dissolved and suspended solids C. As good as that from a complete treatment D. None of these...

Sewer pipes need be checked for_________________?

A. Minimum flow B. Maximum flow C. Both A. and B. D. None of these...

Assertion A.: The minimum self cleansing velocity in the sewer, at least once a day, must be generated. Reason (R): If certain deposition takes place and is not removed, it obstructs free flow and causes further deposition leading to complete blocking of the sewer?

A. Both A and R are true and R is the correct explanation of A B. Both A and R are true but R is not a correct explanation of A C. A is true but R is false D. A is false but R is true...