UV Disinfection

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Wastewater Chemistry
1. A (an) _________is the simplest chemical substance which cannot be
decomposed in a chemical reaction or by any chemical means and is made up of
atoms all having the same number of protons.
a. Neutron
b. Element
c. Electron
d. Compound
2. The loss of electrons by a molecule, atom or ion is called?
a. Oxidation
b. Reduction
c.Stratification
d.Optimization
3. The formation of a solid in a solution during a chemical reaction is called?
a. Activation
b. Digestion
c. Amplification
d. Precipitation
4. Which element best characterizes an organic compound?
a. Oxygen
b. Carbon
c. Hydrogen
d. Nitrogen
5. The measure of a wastewater’s ability to neutralize acid is known as?
a. pH
b. Carbonaceous BOD
6. Ammonia is more basic than water
7.
c. Alkalinity
a. True
d. Acidity
b. False
A method of separating chemical substances based on differences in their
volatilities in a boiling liquid mixture is known as?
a. Digestion
b. Distillation
c. Digression
d. Dilution
8. What pH favors the release of hydrogen sulfide from wastewater
a. pH greater than 7.0
b. pH less than 7.0
9. The ratio that describes the minimum amount of nutrients theoretically required
for an activated sludge system is 100:5:1. What are the elements that fit that ratio?
a. C: P: K
b. H: N: O
c. N: K: C:
d. C: N: P -
10. Organic substance found in detergents which are often referred to as surface
active agents or?
a. Hydroxyls
b.
Sulfates
c. Surfactants
d. Stability enhancers
Answers:
1.
2.
3.
4.
5.
B
A
D
B
C
6. A
7. B
8. B
9. D
10.C
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