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WorksheetsTREATMENT OF WATER
Total questions: 12
Worksheet time: 6mins
1. The world’s available fresh water supply is about _______ percent of that total water supply.
10
4
3
7
2. Which of the following related to the aerobic organic matter is true?
Essential nutrients for growth
Development of sludge deposits
Growth of undesirable aquatic life
Development of septic conditions
3. ______ tend to resist conventional methods of wastewater treatment.
Suspended solids
Nutrients
Refractory organics
Priority pollutants
4. Organic matter + nutrients + O2 → CO2 + H2O + _______
Biomass
Nutirent
O2
Organic matter
5. 2NH3 +3O2 -> 2NO2– + ___ + 2H2O.
O2
2H+
H+
2O2
6. What is the rate of a chemical reaction not dependent on?
Stoichiometry
Surface area of reactants
Temperature
Pressure
7. The degradation of BOD is classified as what type of reaction?
First order
Second order
Third order
Zero order
8. Which of these have a negative electrical charge?
Calcium
Magnesium
Sodium
Chloride
9. The colour of the artificial zeolite is______
Green
Yellow
Grey
White
10. Natural zeolite is mainly processed from_____
White sand
Green sand
Grey sand
Red sand
11. Ion exchange units are known as
Water hardener
Water purifier
Water softener
Exchangers
12. The hardness in the ion exchange process is reduced to_____
0-1 ppm
0-2 ppm
0-3 ppm
0-4 ppm
