Removal of ______________ is accomplished by aeration of water?

Related Mcqs:

Noise level in a quiet private business office is about _____________ decibels?

A. 25 B. 50 C. 70 D. 85...

Iron & manganese present as pollutant in water cannot be removed by__________________?

A. Ion exchange process B. Oxidation followed by settling & filtration C. Lime soda process or manganese zeolite process D. Chlorination...

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...