Wastewater Study Guide
A - answers✔✔________ are the smallest, most numerous, and most important of the
activated sludge microorganisms.
a. Bacteria
b. Fungi
c. Protozoa
d. Amoebic
e. Rotifers
A - answers✔✔________ in the effluent from an activated sludge process is a pollutant
and may create toxic conditions for aquatic life in the receiving stream
a. Ammonia
b. Nitrates
c. Nitrides
d. Nitrogen
e. Alkalinity
A - answers✔✔________________ gas is very toxic and deadens the sense of ________.
a. Hydrogen Sulfide / Smell
b. Hydrogen Peroxide / Smell
c. Hydrogen Sulfide / Taste
d. Chlorine / Taste
e. Methane / Smell
A - answers✔✔A comminutor would be -
a. A mechanical device that screens & cuts large solids in small particles
,b. A electrical device that channels inflow from on trough to another
c. A hydraulic driven device that is used to recycle sludge
d. A mechanical device that is used when bypassing secondary treatment
e. A submersed mechanical air blower
A - answers✔✔A Rotating Biological Contactor (RBC) is -
a. Fixed film biological treatment process
b. Addition to most Activated Sludge Plants
c. New filter media aerobic digester
d. Variable speed Recirculating Biological Contact Unit
e. Reconditioned Biological Containment Unit
A - answers✔✔An effective way for the collection system worker to prevent infection by
waterborn pathogenic organism is to -
a. Wear protective clothing and avoid direct contact with wastewater
b. Receive a vaccination and booster shot each year
c. Wash hands with Antiseptic Soap & follow with Alcohol
d. Keep exposure brief until antibodies are built up and immunity
increases.
e. All the above
A - answers✔✔An operator's flow meter at the plant indicates there was 2.6 MGD flow
through the plant. What is the GPM?
a. 1805
b. 18,055
c. 1083
d. 10,833
e. None of the above
,A - answers✔✔Anaerobic digesters are covered to keep out _______, and to trap useful
methane which can be used to keep the digester warm.
a. Free Oxygen
b. Free Carbon Dioxide
c. Flies, Mosquitoes, and unwanted insects
d. Trespassers
e. TCEQ Field Inspectors
A - answers✔✔Approved disposal methods for digested, dewatered, sludge's are landfill,
_____________ and ____________.
a. Incineration & Land Application
b. Belt Press & Centrifuges
c. Incineration & Solid Waste Disposal (dumpster)
d. Compost & Land Application
e. Compost & Using as a fertilizer
A - answers✔✔Chemical characteristics of sewage include -
a. Solids, Grease, Dissolved Oxygen, O2 Demand, pH, & gases
b. Liquids, Grease, BOD, Oxygen, pH, & gases
c. Solids, Grease, Oxygen, pH, & Organics
d. Water, Dissolved solids, Organics, Suspended Solids, & gases
e. Varies from system to system therefore there is no uniformity
A - answers✔✔Common operating problems with a trickling filter include -
a. Ponding, Filter flies, Odors, Clogging of Nozzles, & Snails
b. Grit removal, Ponding, Filter flies, Snails, & Short cycling
c. Mudballs, Snails, Filter flies, Odors, & Clogging of nozzles
d. Hydraulic motors have short life, Odors, & Clogging of nozzles
e. Bearing wear, distributor arm fatigue, corrosion, Filter flies & snails
, A - answers✔✔Dangerous gases are produced during bacterial decomposition of organics in
wastewater. The main gases are -
a. Hydrogen Sulfide, Carbon Dioxide, & Methane
b. Hydrogen Sulfide, Carbon Monoxide, & Methane
c. Natural gas, Methane, & Hydrogen Sulfide
d. Ammonia, Methane, & Hydrogen Sulfide
e. Carbon Dioxide, Methane, & Ammonia
A - answers✔✔Each person contributes approximately ______ lbs of BOD to the system
daily.
a. 0.17
b. 0.71
c. 1.7
d. 17
e. 17.4
A - answers✔✔Enforcement action from TCEQ may be taken if pollution or waste violates
the Texas Water Code. Violations of the Water Code may include -
a. Unauthorized Discharge, Accidental Discharge, & Health Hazard
b. Authorized Discharge, Accidental Discharge, & Health Hazard
c. Unreported Discharge, or Health Code Violation
d. Bypass, Unreported Discharge, or Health Hazard
e. Enforcement is not typically imposed for Water Code Violations
A - answers✔✔Essential components of the wastewater collection system include -
a. Sewer Mains & Piping, Lift Stations, Pumps, Grease & Sand Traps, &
Manholes
b. Sewer Mains & Piping, Lift Stations, Grease Traps & Sand Traps,
A - answers✔✔________ are the smallest, most numerous, and most important of the
activated sludge microorganisms.
a. Bacteria
b. Fungi
c. Protozoa
d. Amoebic
e. Rotifers
A - answers✔✔________ in the effluent from an activated sludge process is a pollutant
and may create toxic conditions for aquatic life in the receiving stream
a. Ammonia
b. Nitrates
c. Nitrides
d. Nitrogen
e. Alkalinity
A - answers✔✔________________ gas is very toxic and deadens the sense of ________.
a. Hydrogen Sulfide / Smell
b. Hydrogen Peroxide / Smell
c. Hydrogen Sulfide / Taste
d. Chlorine / Taste
e. Methane / Smell
A - answers✔✔A comminutor would be -
a. A mechanical device that screens & cuts large solids in small particles
,b. A electrical device that channels inflow from on trough to another
c. A hydraulic driven device that is used to recycle sludge
d. A mechanical device that is used when bypassing secondary treatment
e. A submersed mechanical air blower
A - answers✔✔A Rotating Biological Contactor (RBC) is -
a. Fixed film biological treatment process
b. Addition to most Activated Sludge Plants
c. New filter media aerobic digester
d. Variable speed Recirculating Biological Contact Unit
e. Reconditioned Biological Containment Unit
A - answers✔✔An effective way for the collection system worker to prevent infection by
waterborn pathogenic organism is to -
a. Wear protective clothing and avoid direct contact with wastewater
b. Receive a vaccination and booster shot each year
c. Wash hands with Antiseptic Soap & follow with Alcohol
d. Keep exposure brief until antibodies are built up and immunity
increases.
e. All the above
A - answers✔✔An operator's flow meter at the plant indicates there was 2.6 MGD flow
through the plant. What is the GPM?
a. 1805
b. 18,055
c. 1083
d. 10,833
e. None of the above
,A - answers✔✔Anaerobic digesters are covered to keep out _______, and to trap useful
methane which can be used to keep the digester warm.
a. Free Oxygen
b. Free Carbon Dioxide
c. Flies, Mosquitoes, and unwanted insects
d. Trespassers
e. TCEQ Field Inspectors
A - answers✔✔Approved disposal methods for digested, dewatered, sludge's are landfill,
_____________ and ____________.
a. Incineration & Land Application
b. Belt Press & Centrifuges
c. Incineration & Solid Waste Disposal (dumpster)
d. Compost & Land Application
e. Compost & Using as a fertilizer
A - answers✔✔Chemical characteristics of sewage include -
a. Solids, Grease, Dissolved Oxygen, O2 Demand, pH, & gases
b. Liquids, Grease, BOD, Oxygen, pH, & gases
c. Solids, Grease, Oxygen, pH, & Organics
d. Water, Dissolved solids, Organics, Suspended Solids, & gases
e. Varies from system to system therefore there is no uniformity
A - answers✔✔Common operating problems with a trickling filter include -
a. Ponding, Filter flies, Odors, Clogging of Nozzles, & Snails
b. Grit removal, Ponding, Filter flies, Snails, & Short cycling
c. Mudballs, Snails, Filter flies, Odors, & Clogging of nozzles
d. Hydraulic motors have short life, Odors, & Clogging of nozzles
e. Bearing wear, distributor arm fatigue, corrosion, Filter flies & snails
, A - answers✔✔Dangerous gases are produced during bacterial decomposition of organics in
wastewater. The main gases are -
a. Hydrogen Sulfide, Carbon Dioxide, & Methane
b. Hydrogen Sulfide, Carbon Monoxide, & Methane
c. Natural gas, Methane, & Hydrogen Sulfide
d. Ammonia, Methane, & Hydrogen Sulfide
e. Carbon Dioxide, Methane, & Ammonia
A - answers✔✔Each person contributes approximately ______ lbs of BOD to the system
daily.
a. 0.17
b. 0.71
c. 1.7
d. 17
e. 17.4
A - answers✔✔Enforcement action from TCEQ may be taken if pollution or waste violates
the Texas Water Code. Violations of the Water Code may include -
a. Unauthorized Discharge, Accidental Discharge, & Health Hazard
b. Authorized Discharge, Accidental Discharge, & Health Hazard
c. Unreported Discharge, or Health Code Violation
d. Bypass, Unreported Discharge, or Health Hazard
e. Enforcement is not typically imposed for Water Code Violations
A - answers✔✔Essential components of the wastewater collection system include -
a. Sewer Mains & Piping, Lift Stations, Pumps, Grease & Sand Traps, &
Manholes
b. Sewer Mains & Piping, Lift Stations, Grease Traps & Sand Traps,
