The detention time (t) of a settling tank, may be defined as the time required for_________________?

Related Mcqs:

For drainage pipes in buildings the test applied before putting them to use, is__________________?

A. Water test B. Smoke test C. Straightness test D. All the above...

If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is_________________?

A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l...

The first stage of neutral process of sludge digestion, is__________________?

A. Acid fermentation B. Acid regressio C. Alkaline fermentation D. None of these...

The gas evolved in sewers is________________?

A. Carbondioxide B. Hydrogen sulphide C. Methane D. All of these...

In sewers designed with self cleansing velocity________________?

A. The bottom is silted B. The bottom is scoured C. Both silting and scouring occur at the bottom D. Neither silting nor scouring occurs at the bottom...