Wastewater Study Guide
________ are the smallest, most severa, and maximum crucial of the
activated sludge microorganisms.
A. Bacteria
b. Fungi
c. Protozoa
d. Amoebic
e. Rotifers - ANS-A
________ inside the effluent from an activated sludge manner is a pollutant
and might create poisonous conditions for aquatic life inside the receiving flow
a. Ammonia
b. Nitrates
c. Nitrides
d. Nitrogen
e. Alkalinity - ANS-A
________ eliminates Total Suspended Solids (TSS)
a. Chemicals
b. Aeration
c. Sedimentation
d. Detention
e. Filtration - ANS-E
_____________ gasoline is colorless, odorless, and heavier than air
a. Hydrogen Sulfide
b. Chlorine
c. Methane
d. Nitrogen
e. Petroleum - ANS-C
_____________ gasoline is greenish-yellow, pungent, heavier than air and
quite poisonous
a. Hydrogen Sulfide
b. Chlorine
c. Methane
d. Nitrogen
e. Hydrogen Peroxide - ANS-B
________________ gas is very toxic and deadens the experience of ________.
,A. Hydrogen Sulfide / Smell
b. Hydrogen Peroxide / Smell
c. Hydrogen Sulfide / Taste
d. Chlorine / Taste
e. Methane / Smell - ANS-A
A centrifugal pump should be ______ or it's going to no longer pump.
A. Vented
b. Flushed Periodically
c. Primed
d. Phased to proper rotation
e. Properly Packed - ANS-C
A comminutor might be -
a. A mechanical tool that monitors & cuts big solids in small particles
b. A electrical tool that channels influx from on trough to every other
c. A hydraulic driven tool that is used to recycle sludge
d. A mechanical device this is used while bypassing secondary remedy
e. A submersed mechanical air blower - ANS-A
A dosage of five mg/L of chlorine is brought to 2.Zero MGD of wastewater. How
many kilos of chlorine is brought? (Hint: Chlorine= MG X 8.34 X dosage)
a. 8.34 kilos
b. Sixteen.Sixty eight kilos
c. 83.4 pounds
d. 834 pounds
e. None of the above - ANS-C
A accurate plant influent pH is about _______
a. 6.5
b. 7.Zero
c. 7.2
d. 7.5
e. Eight.0 - ANS-C
A licensed wastewater operator is a expert who - a. Consistently does the excellent task
feasible
b. Practices personal safety
c. Strives to enhance job knowledge
d. Strives to maintain the plant and series machine within the high-quality look and operating
order
e. All the above - ANS-E
A preferred hydraulic approach of cleansing sewer traces is - a. Cable & Auger
,b. Continuous Roding Machine
c. Hydro Jet Cleaner
d. Bucket & Belt Press
e. Both a & d - ANS-C
A nicely designed and operated number one sedimentation tank ought to eliminate ______
percent of incoming BOD? A. 10 to 15 %
b. 20 to 30 %
c. 30 to forty %
d. 35 to 50%
e. None of the above - ANS-C
A Rotating Biological Contactor (RBC) is -
a. Fixed film organic remedy system
b. Addition to maximum Activated Sludge Plants
c. New clear out media aerobic digester
d. Variable pace Recirculating Biological Contact Unit
e. Reconditioned Biological Containment Unit - ANS-A
A sewer manhole provides get entry to into the machine for cleansing or provider. A
manhole is located -
a. At modifications in pipe composition, grade, route & intersection
b. At modifications in pipe composition, grade, course, & intersection
c. At adjustments in alignment, diameter, grade, direction, & intersection
d. At the discretion of the engineer & public works director
e. Where a sewer clean out isn't viable - ANS-C
A simple method for indicating whilst to waste sludge is -
a. Mixed liquor suspended solids check
b. Sludge extent index take a look at
c. Total Sedimentation Test
d. BOD Test
e. 30 minute settling take a look at - ANS-E
Acute toxicity happens while -
a. There is a sluggish die off of remedy organisms
b. There is a rapid die off of remedy organisms
c. A spill takes place and herbicides turn out to be within the series device
d. Septic situations exist due to blockage within the collection device
e. Operators take extended depart with a "hottie - ANS-B
Aerated Lagoons depend on __________ to offer ________ and ________
a. Sunlight & Wind / Agitation & Mixing
b. Mechanical aeration / Flow & Circulation
, c. Hydraulic power / Agitation & Circulation
d. Mechanical aeration / Aeration & Mixing
e. Injected liquid oxygen / Aeration & Circulation - ANS-D
Aerobic Bacteria require _______ inside the water for their metabolism
a. Nitrogen
b. Hydrogen
c. Oxygen
d. Either aerobic or anaerobic situations
e. Cannot live with O2 gift - ANS-C
Aerobic digestion is an __________ technique wherein the aerobic micro organism
eat themselves.
A. Endemic
b. Endogenous
c. Endothermic
d. Endocrine
e. Endorphin - ANS-B
All reclaimed water piping ought to be _______ in coloration.
A. White
b. Blue
c. Red
d. Brown
e. Purple - ANS-E
An aeration basin holds 5000 gallons of blended liquor, the MLSS is
4000 mg/l and the inflow is 200 gallons in keeping with hour. Calculate the detention
time of the aeration tank in hours. (D.T. = V divided by way of Q)
a. 2 hours
b. 4 hours
c. 12 hours
d. 24 hours
e. 25 hours - ANS-E
An effective way for the collection system worker to save you contamination by way of
waterborn pathogenic organism is to -
a. Wear protecting clothing and keep away from direct contact with wastewater
b. Receive a vaccination and booster shot each year
c. Wash arms with Antiseptic Soap & comply with with Alcohol
d. Keep exposure quick till antibodies are built up and immunity
increases.
E. All the above - ANS-A
________ are the smallest, most severa, and maximum crucial of the
activated sludge microorganisms.
A. Bacteria
b. Fungi
c. Protozoa
d. Amoebic
e. Rotifers - ANS-A
________ inside the effluent from an activated sludge manner is a pollutant
and might create poisonous conditions for aquatic life inside the receiving flow
a. Ammonia
b. Nitrates
c. Nitrides
d. Nitrogen
e. Alkalinity - ANS-A
________ eliminates Total Suspended Solids (TSS)
a. Chemicals
b. Aeration
c. Sedimentation
d. Detention
e. Filtration - ANS-E
_____________ gasoline is colorless, odorless, and heavier than air
a. Hydrogen Sulfide
b. Chlorine
c. Methane
d. Nitrogen
e. Petroleum - ANS-C
_____________ gasoline is greenish-yellow, pungent, heavier than air and
quite poisonous
a. Hydrogen Sulfide
b. Chlorine
c. Methane
d. Nitrogen
e. Hydrogen Peroxide - ANS-B
________________ gas is very toxic and deadens the experience of ________.
,A. Hydrogen Sulfide / Smell
b. Hydrogen Peroxide / Smell
c. Hydrogen Sulfide / Taste
d. Chlorine / Taste
e. Methane / Smell - ANS-A
A centrifugal pump should be ______ or it's going to no longer pump.
A. Vented
b. Flushed Periodically
c. Primed
d. Phased to proper rotation
e. Properly Packed - ANS-C
A comminutor might be -
a. A mechanical tool that monitors & cuts big solids in small particles
b. A electrical tool that channels influx from on trough to every other
c. A hydraulic driven tool that is used to recycle sludge
d. A mechanical device this is used while bypassing secondary remedy
e. A submersed mechanical air blower - ANS-A
A dosage of five mg/L of chlorine is brought to 2.Zero MGD of wastewater. How
many kilos of chlorine is brought? (Hint: Chlorine= MG X 8.34 X dosage)
a. 8.34 kilos
b. Sixteen.Sixty eight kilos
c. 83.4 pounds
d. 834 pounds
e. None of the above - ANS-C
A accurate plant influent pH is about _______
a. 6.5
b. 7.Zero
c. 7.2
d. 7.5
e. Eight.0 - ANS-C
A licensed wastewater operator is a expert who - a. Consistently does the excellent task
feasible
b. Practices personal safety
c. Strives to enhance job knowledge
d. Strives to maintain the plant and series machine within the high-quality look and operating
order
e. All the above - ANS-E
A preferred hydraulic approach of cleansing sewer traces is - a. Cable & Auger
,b. Continuous Roding Machine
c. Hydro Jet Cleaner
d. Bucket & Belt Press
e. Both a & d - ANS-C
A nicely designed and operated number one sedimentation tank ought to eliminate ______
percent of incoming BOD? A. 10 to 15 %
b. 20 to 30 %
c. 30 to forty %
d. 35 to 50%
e. None of the above - ANS-C
A Rotating Biological Contactor (RBC) is -
a. Fixed film organic remedy system
b. Addition to maximum Activated Sludge Plants
c. New clear out media aerobic digester
d. Variable pace Recirculating Biological Contact Unit
e. Reconditioned Biological Containment Unit - ANS-A
A sewer manhole provides get entry to into the machine for cleansing or provider. A
manhole is located -
a. At modifications in pipe composition, grade, route & intersection
b. At modifications in pipe composition, grade, course, & intersection
c. At adjustments in alignment, diameter, grade, direction, & intersection
d. At the discretion of the engineer & public works director
e. Where a sewer clean out isn't viable - ANS-C
A simple method for indicating whilst to waste sludge is -
a. Mixed liquor suspended solids check
b. Sludge extent index take a look at
c. Total Sedimentation Test
d. BOD Test
e. 30 minute settling take a look at - ANS-E
Acute toxicity happens while -
a. There is a sluggish die off of remedy organisms
b. There is a rapid die off of remedy organisms
c. A spill takes place and herbicides turn out to be within the series device
d. Septic situations exist due to blockage within the collection device
e. Operators take extended depart with a "hottie - ANS-B
Aerated Lagoons depend on __________ to offer ________ and ________
a. Sunlight & Wind / Agitation & Mixing
b. Mechanical aeration / Flow & Circulation
, c. Hydraulic power / Agitation & Circulation
d. Mechanical aeration / Aeration & Mixing
e. Injected liquid oxygen / Aeration & Circulation - ANS-D
Aerobic Bacteria require _______ inside the water for their metabolism
a. Nitrogen
b. Hydrogen
c. Oxygen
d. Either aerobic or anaerobic situations
e. Cannot live with O2 gift - ANS-C
Aerobic digestion is an __________ technique wherein the aerobic micro organism
eat themselves.
A. Endemic
b. Endogenous
c. Endothermic
d. Endocrine
e. Endorphin - ANS-B
All reclaimed water piping ought to be _______ in coloration.
A. White
b. Blue
c. Red
d. Brown
e. Purple - ANS-E
An aeration basin holds 5000 gallons of blended liquor, the MLSS is
4000 mg/l and the inflow is 200 gallons in keeping with hour. Calculate the detention
time of the aeration tank in hours. (D.T. = V divided by way of Q)
a. 2 hours
b. 4 hours
c. 12 hours
d. 24 hours
e. 25 hours - ANS-E
An effective way for the collection system worker to save you contamination by way of
waterborn pathogenic organism is to -
a. Wear protecting clothing and keep away from direct contact with wastewater
b. Receive a vaccination and booster shot each year
c. Wash arms with Antiseptic Soap & comply with with Alcohol
d. Keep exposure quick till antibodies are built up and immunity
increases.
E. All the above - ANS-A
