TEST TMA 2012-2 (UPNA)

If water has a high concentration of ions, it will be purified very well by filtration over activated carbon. TRUE. FALSE.

The content of organochlorine pesticides and other poorly biodegradable organic compounds in liquid effluents contributes to the BOD value, but not to the COD. TRUE. FALSE.

The discharge of hot water into a river has no environmental effect. TRUE. FALSE.

In nitrification, NO2- and NO3- are obtained from NH4+. Denitrification is the reverse reaction. TRUE. FALSE.

Waters classified as natural only contain H2O in their composition. Therefore, they can be used as drinking water. TRUE. FALSE.

The GAC (Granular Activated Carbon) process is an anaerobic treatment method to remove O.M. TRUE. FALSE.

In a purification process via absorption, increasing the total pressure of the system decreases the amount of pollutant gas retained. TRUE. FALSE.

NOx emissions can be totally reduced if we use pure O2 as the oxidant. TRUE. FALSE.

It is desirable for a certain amount of ozone to exist in the atmosphere, whether in the troposphere or the stratosphere. TRUE. FALSE.

The danger of particles to humans depends solely on their size. TRUE. FALSE.