Fresh domestic sewage is _______________ in color?

Related Mcqs:

The term Biological Oxygen Demand (BOD) is used in relation to ______________________?

A. Potable water B. Cooling water C. Distilled water D. Industrial effluents...

The function of skimming tank in sewage treatment is to remove _____________ substances?

A. Dissolved solid B. Suspended solid C. Oil & fatty D. Gritty & inorganic...

Pick out the wrong statement pertaining to ‘green house’ for the plants ?

A. ‘Green house’ (made of glass) allows visible sunlight (i.e., short wavelength solar radiation like ultra-violet rays) to pass through the glass and heat up the soil thereby warming up plants inside it B. The emitted longer wavelength radiation (e.g., infrared) is partly reflected and partly absorbed by the glass of the green house C. … Pick out the wrong statement pertaining to ‘green house’ for the plants ?Read More...

Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in____________________?

A. Coagulation and flocculation of colloids B. Oxidation of carbonaceous matter to CO2 C. Nitrification or oxidation of ammonia derived from breakdown of nitrogenous organic matter to the nitrite and eventually to the nitrate D. All A., B. and C....

Noise level heard at a distance of about 100 metres from a jet engine with after burner is about _____________ decibels?

A. 120 B. 140 C. 170 D. 200...