WASTEWATER 2 ABC #2|
ADVANCED WASTEWATER
TREATMENT CERTIFICATION
PREP QUESTIONS AND CORRECT
ANSWERS
1. The fecal coliform group is comprised of Escherichia
coli and ___________
A. Streptococcu
B. Enterobactor
C. Klebsiella
D. Citrobacter
C. Klebsiella
2. Coliform bacteria are ____________
A. Pathogens which cause hepatitis
,B. More resistant to chlorination than pathogenic bacteria
C. Pathogens which can cause typhoid
D. Less resistant to chlorination than pathogenic bacteria
B. More resistant to chlorination than pathogenic bacteria
3. The typical air-to-solids ratio for a dissolved air
floatation unit is ________
A. 0.02 to 0.04 kg/kg (0.02 to 0.04 lb/lb)
B. 10 to 40 kg/kg (10 to 40 lb/lb)
C. 0.2 to 0.4 kg/kg (0.2 to 0.4 lb/lb)
D. 1 to 5 kg/kg (1 to 5 lb/lb)
A. 0.02 to 0.04 kg/kg (0.02 to 0.04 lb/lb)
4. ORP stands for _____________
A. Oxygen recirculation pump
B. Oxygen reclamation process
C. Oxygen residual probe
D. Oxidation reduction potential
D. Oxidation reduction potential
5. A confined space atmosphere contains a combustible
gas. At what percentage of the Lower Explosive Limit
(LEL) for that gas is the atmosphere considered
"hazardous"?
,A. 19.5%
B. 10%
C. 15%
D. 1%
C. 15%
6. When using an evaporator in disinfection, the chlorine-
pressure-reducing valve should be located _______
A. Next to the evaporator
B. Inside the evaporator
C. Upstream of the evaporator
D. Downstream of the evaporator
D. Downstream of the evaporator
7. The vapor density of a hazardous gas present in a
confined space is 1.15. Where is this gas likely to be
found?
A. At this density, the gas will dissipate immediately
B. Near the ceiling
C. Equally distributed throughout the space
D. Near the floor
D. Near the floor
, 8. A pH drop in an aerobic digester can be caused by
_________
A. Organic underloading
B. Hydraulic overloading
C. Nitrification or CO2 buildup
D. Clogging of diffusers
C. Nitrification of CO2 buildup
9. A "dewatering" beach is a component of a(n)
____________
A. Anaerobic digester
B. Centrifuge
C. Belt filter press
D. Aeration basin
B. Centrifuge
10. Potassium permanganate is used for
_______________
A. Stabilization
B. Disinfection
C. Coagulation
D. Odor control
ADVANCED WASTEWATER
TREATMENT CERTIFICATION
PREP QUESTIONS AND CORRECT
ANSWERS
1. The fecal coliform group is comprised of Escherichia
coli and ___________
A. Streptococcu
B. Enterobactor
C. Klebsiella
D. Citrobacter
C. Klebsiella
2. Coliform bacteria are ____________
A. Pathogens which cause hepatitis
,B. More resistant to chlorination than pathogenic bacteria
C. Pathogens which can cause typhoid
D. Less resistant to chlorination than pathogenic bacteria
B. More resistant to chlorination than pathogenic bacteria
3. The typical air-to-solids ratio for a dissolved air
floatation unit is ________
A. 0.02 to 0.04 kg/kg (0.02 to 0.04 lb/lb)
B. 10 to 40 kg/kg (10 to 40 lb/lb)
C. 0.2 to 0.4 kg/kg (0.2 to 0.4 lb/lb)
D. 1 to 5 kg/kg (1 to 5 lb/lb)
A. 0.02 to 0.04 kg/kg (0.02 to 0.04 lb/lb)
4. ORP stands for _____________
A. Oxygen recirculation pump
B. Oxygen reclamation process
C. Oxygen residual probe
D. Oxidation reduction potential
D. Oxidation reduction potential
5. A confined space atmosphere contains a combustible
gas. At what percentage of the Lower Explosive Limit
(LEL) for that gas is the atmosphere considered
"hazardous"?
,A. 19.5%
B. 10%
C. 15%
D. 1%
C. 15%
6. When using an evaporator in disinfection, the chlorine-
pressure-reducing valve should be located _______
A. Next to the evaporator
B. Inside the evaporator
C. Upstream of the evaporator
D. Downstream of the evaporator
D. Downstream of the evaporator
7. The vapor density of a hazardous gas present in a
confined space is 1.15. Where is this gas likely to be
found?
A. At this density, the gas will dissipate immediately
B. Near the ceiling
C. Equally distributed throughout the space
D. Near the floor
D. Near the floor
, 8. A pH drop in an aerobic digester can be caused by
_________
A. Organic underloading
B. Hydraulic overloading
C. Nitrification or CO2 buildup
D. Clogging of diffusers
C. Nitrification of CO2 buildup
9. A "dewatering" beach is a component of a(n)
____________
A. Anaerobic digester
B. Centrifuge
C. Belt filter press
D. Aeration basin
B. Centrifuge
10. Potassium permanganate is used for
_______________
A. Stabilization
B. Disinfection
C. Coagulation
D. Odor control
