The biological decomposition of organic substances in wastes controlled conditions is called_________________?

Related Mcqs:

Pick out the correct statement ?

A. Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present in water B. COD is determined by oxidising the organic matter present in water with potassium dichromate in cone, sulphuric acid solution at boiling temperature for specified time C. COD is related to BOD of a given waste in water but … Pick out the correct statement ?Read More...

Deaeration of high pressure boiler feed water is done to reduce ___________________?

A. Foaming from boilers B. Its dissolved oxygen content C. Its silica content D. Caustic embrittlement...

Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxiate is ≥ _____________ percent?

A. 84 B. 88 C. 80 D. 92...

Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the_______________?

A. Forestation B. Rain C. Green house effect D. Vegetation...

Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called_________________?

A. Fumes B. Mists C. Smoke D. Aerosols...