The amount of oxygen consumed by the aerobic bacterias which cause the aerobic biological decomposition of sewage, is known_________________?

Related Mcqs:

Removal of oil and grease from sewage, is known____________________?

A. Screening B. Skimming C. Filtration D. None of these...

For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is________________?

A. 10 cm B. 12 cm C. 15 cm D. 18 cm...

The rate of accumulation of sludge per person per year, is_______________________?

A. 10 litres B. 15 litres C. 20 litres D. 25 litres...

For evaporation and measurement of settable solids, the apparatus used, is________________?

A. A jar B. A breaker C. A test tube D. An Imhoff cone...

If the depth of flow in a circular sewer is 1/4th of its diameter D, the wetted perimeter is______________?

A. /2 B. /4 C. /3 D. D...