Wastewater Operator Exam TN
Questions With Correct Answers
Which |of |the |following |is |not |likely |to |develop |if |wastewater |remains |int |eh |collection |system |
too |long? |- |CORRECT |ANSWER✔✔-Algae
A |high |sewage |pH |can |result |int |production |of |toxic |gases |due |to |: |- |CORRECT |ANSWER✔✔-
Ammonia
What |problems |do |septic |conditions |in |the |collection |system |cause |at |the |treatment |plant? |- |
CORRECT |ANSWER✔✔-Odor |and |oxygen |demand
If |a |lift |station |pump |will |not |start |what |do |you |check? |- |CORRECT |ANSWER✔✔-Broken |and |
loose |terminal |connections
Shaft |binding |or |sticking |
Motor |shorted |or |burned |out
The |amount |of |iron |salts |fed |to |the |collection |system |should |be |increased |whenever |the: |- |
CORRECT |ANSWER✔✔-Hydrogen |sulfide |level |increases
Where |should |the |flow |meter |sensor |be |located |at |the |parshall |flume? |- |CORRECT |
ANSWER✔✔-At |a |specified |location |in |the |convergence |of |the |flume
What/where |is |the |palmer |bowlus |flume |used |in |wastewater? |- |CORRECT |ANSWER✔✔-
Primary |application: |pipelines, |round |bottom |channels, |manholes |where |it |is |often |preferred |
because |the |cost |and |ease |of |installation |that |can |minimize |construction |expense
,Which |of |the |following |statements |is |not |true |concerning |the |operation |of |a |magnetic |flow |
meter? |- |CORRECT |ANSWER✔✔-It |operates |partially |full
What |methods |can |be |used |to |check |the |performance |of |a |flow |meter? |- |CORRECT |
ANSWER✔✔-Measure |area |and |velocity |in |an |open |channel |
Measure |how |long |it |takes |to |fill |a |55 |gallon |drum |
Measure |how |long |it |takes |to |fill |a |tank
On |what |type |of |treatment |process |do |hydraulic |flow |variations |have |the |greatest |impact? |- |
CORRECT |ANSWER✔✔-Activated |sludge
What |is |important |to |understand |about |the |impact |of |high |flow |on |treatment |units? |- |
CORRECT |ANSWER✔✔-As |flow |increases, |detention |time |decreases
What |is |the |first |indication |that |a |strong |toxic |industrial |substance |has |entered |the |activated |
sludge |plant? |- |CORRECT |ANSWER✔✔-Increase |in |oxygen |concentration |in |the |aeration |basin
Which |type |of |cave |in |protection |provides |the |best |and |most |practical |way |to |protect |workers |
in |deep |excavations? |- |CORRECT |ANSWER✔✔-Drag |shields |and |shoring
How |do |manholes, |lift |stations, |and |other |features |associated |with |collections/treatment |
systems |would |be |viewed |from |a |risk |assessment |point |of |view? |- |CORRECT |ANSWER✔✔-
Vulnerabilities
Which |of |the |following |is |an |offensive |smelling |gas |found |in |wastewater |treatment |plants? |- |
CORRECT |ANSWER✔✔-Mercaptan
,Workers |in |a |sludge |composting |operation |should |wear |respiratory |protection |because |the |
compost |can |give |off: |- |CORRECT |ANSWER✔✔-Airborne |sludge |particles
What |safety |equipment |should |an |operator |use |in |areas |containing |gaseous |and |particulate |
contaminants? |- |CORRECT |ANSWER✔✔-Supplied |air |respirator
Which |type |of |fire |extinguisher |should |be |used |for |an |electrical |fire? |- |CORRECT |ANSWER✔✔-
Class |C
An |accident |prevention |program |in |generate |involves |which |of |the |following |sets |of |steps? |- |
CORRECT |ANSWER✔✔-Recognition |of |hazards, |evaluation |of |hazards, |and |control |of |hazards
How |often |should |fire |extinguisher |be |recharged? |- |CORRECT |ANSWER✔✔-After |every |use
Which |of |the |following |can |poison |the |atmosphere |in |a |room |and |should |always |be |handled |
with |special |care? |- |CORRECT |ANSWER✔✔-Mercury
What |is |the |danger |level |as |defined |by |federal |refs, |to |individuals |whose |normal |noise |
exposure |might |equal |or |exceed |this |dangerous |level |- |CORRECT |ANSWER✔✔-8 |hour |(TWA) |of
|85 |decibels
Widely |fluctuating |hydraulic |flows |may |require |which |of |the |following? |- |CORRECT |
ANSWER✔✔-Flow |equalization
If |you |noticed |poor |solids |settling |in |the |clarifier |and |solids |overflow |into |the |chlorine |contact |
chamber, |what |would |you |do |if |the |dilated |settleometer |showed |improved |settling?? |- |
CORRECT |ANSWER✔✔-Increase |sludge |wasting
As |temperature |decreases |under |normal |conditions |which |are |the |following |effect |- |CORRECT |
ANSWER✔✔-Biological |activity |slows |down, |viscosity |of |the |H2O |increases, |solids |settle |slow
, How |does |a |water |temperature |decrease |affect |aerobic |biological |processes? |- |CORRECT |
ANSWER✔✔-Decrease |in |solids |settling |efficiency
More |oxygen |in |the |solution
Fine |screens |typically |consist |of |wedge |wire, |perforated |plate, |or |closely |spaced |bars |with |
openings |in |what |range? |- |CORRECT |ANSWER✔✔-0.06 |- |0.25 |inches
One |advantage |of |rotating |screens |over |stationary |screens |is |that |rotating |screens |generally |- |
CORRECT |ANSWER✔✔-Do |not |dam |the |flow
What |is |the |purpose |of |injecting |diffused |air |into |aerated |grit |chambers? |- |CORRECT |
ANSWER✔✔-To |lower |the |specific |gravity |of |water
What |is |accomplished |by |an |aerated |grit |chamber? |- |CORRECT |ANSWER✔✔-Grit |is |removed
Grit |is |washed |
Wastewater |is |freshened
When |using |cyclones |at |the |end |of |a |grit |removal |process |what |will |cause |a |decrease |in |grit |
removal |efficiency |in |the |cyclone? |- |CORRECT |ANSWER✔✔-Cyclone |inlet |pressure |too |low.
Increase |the |inlet |pressure |by |adjusting |the |grit |pump |discharge
What |should |an |operator |do |if |the |communicator |is |not |operating |properly? |- |CORRECT |
ANSWER✔✔-Check |the |motor |and |look |for |blockage |
Cut |off |the |electricity |
Lock |out |and |tag |the |breaker |
Place |the |bar |screen |into |service
Questions With Correct Answers
Which |of |the |following |is |not |likely |to |develop |if |wastewater |remains |int |eh |collection |system |
too |long? |- |CORRECT |ANSWER✔✔-Algae
A |high |sewage |pH |can |result |int |production |of |toxic |gases |due |to |: |- |CORRECT |ANSWER✔✔-
Ammonia
What |problems |do |septic |conditions |in |the |collection |system |cause |at |the |treatment |plant? |- |
CORRECT |ANSWER✔✔-Odor |and |oxygen |demand
If |a |lift |station |pump |will |not |start |what |do |you |check? |- |CORRECT |ANSWER✔✔-Broken |and |
loose |terminal |connections
Shaft |binding |or |sticking |
Motor |shorted |or |burned |out
The |amount |of |iron |salts |fed |to |the |collection |system |should |be |increased |whenever |the: |- |
CORRECT |ANSWER✔✔-Hydrogen |sulfide |level |increases
Where |should |the |flow |meter |sensor |be |located |at |the |parshall |flume? |- |CORRECT |
ANSWER✔✔-At |a |specified |location |in |the |convergence |of |the |flume
What/where |is |the |palmer |bowlus |flume |used |in |wastewater? |- |CORRECT |ANSWER✔✔-
Primary |application: |pipelines, |round |bottom |channels, |manholes |where |it |is |often |preferred |
because |the |cost |and |ease |of |installation |that |can |minimize |construction |expense
,Which |of |the |following |statements |is |not |true |concerning |the |operation |of |a |magnetic |flow |
meter? |- |CORRECT |ANSWER✔✔-It |operates |partially |full
What |methods |can |be |used |to |check |the |performance |of |a |flow |meter? |- |CORRECT |
ANSWER✔✔-Measure |area |and |velocity |in |an |open |channel |
Measure |how |long |it |takes |to |fill |a |55 |gallon |drum |
Measure |how |long |it |takes |to |fill |a |tank
On |what |type |of |treatment |process |do |hydraulic |flow |variations |have |the |greatest |impact? |- |
CORRECT |ANSWER✔✔-Activated |sludge
What |is |important |to |understand |about |the |impact |of |high |flow |on |treatment |units? |- |
CORRECT |ANSWER✔✔-As |flow |increases, |detention |time |decreases
What |is |the |first |indication |that |a |strong |toxic |industrial |substance |has |entered |the |activated |
sludge |plant? |- |CORRECT |ANSWER✔✔-Increase |in |oxygen |concentration |in |the |aeration |basin
Which |type |of |cave |in |protection |provides |the |best |and |most |practical |way |to |protect |workers |
in |deep |excavations? |- |CORRECT |ANSWER✔✔-Drag |shields |and |shoring
How |do |manholes, |lift |stations, |and |other |features |associated |with |collections/treatment |
systems |would |be |viewed |from |a |risk |assessment |point |of |view? |- |CORRECT |ANSWER✔✔-
Vulnerabilities
Which |of |the |following |is |an |offensive |smelling |gas |found |in |wastewater |treatment |plants? |- |
CORRECT |ANSWER✔✔-Mercaptan
,Workers |in |a |sludge |composting |operation |should |wear |respiratory |protection |because |the |
compost |can |give |off: |- |CORRECT |ANSWER✔✔-Airborne |sludge |particles
What |safety |equipment |should |an |operator |use |in |areas |containing |gaseous |and |particulate |
contaminants? |- |CORRECT |ANSWER✔✔-Supplied |air |respirator
Which |type |of |fire |extinguisher |should |be |used |for |an |electrical |fire? |- |CORRECT |ANSWER✔✔-
Class |C
An |accident |prevention |program |in |generate |involves |which |of |the |following |sets |of |steps? |- |
CORRECT |ANSWER✔✔-Recognition |of |hazards, |evaluation |of |hazards, |and |control |of |hazards
How |often |should |fire |extinguisher |be |recharged? |- |CORRECT |ANSWER✔✔-After |every |use
Which |of |the |following |can |poison |the |atmosphere |in |a |room |and |should |always |be |handled |
with |special |care? |- |CORRECT |ANSWER✔✔-Mercury
What |is |the |danger |level |as |defined |by |federal |refs, |to |individuals |whose |normal |noise |
exposure |might |equal |or |exceed |this |dangerous |level |- |CORRECT |ANSWER✔✔-8 |hour |(TWA) |of
|85 |decibels
Widely |fluctuating |hydraulic |flows |may |require |which |of |the |following? |- |CORRECT |
ANSWER✔✔-Flow |equalization
If |you |noticed |poor |solids |settling |in |the |clarifier |and |solids |overflow |into |the |chlorine |contact |
chamber, |what |would |you |do |if |the |dilated |settleometer |showed |improved |settling?? |- |
CORRECT |ANSWER✔✔-Increase |sludge |wasting
As |temperature |decreases |under |normal |conditions |which |are |the |following |effect |- |CORRECT |
ANSWER✔✔-Biological |activity |slows |down, |viscosity |of |the |H2O |increases, |solids |settle |slow
, How |does |a |water |temperature |decrease |affect |aerobic |biological |processes? |- |CORRECT |
ANSWER✔✔-Decrease |in |solids |settling |efficiency
More |oxygen |in |the |solution
Fine |screens |typically |consist |of |wedge |wire, |perforated |plate, |or |closely |spaced |bars |with |
openings |in |what |range? |- |CORRECT |ANSWER✔✔-0.06 |- |0.25 |inches
One |advantage |of |rotating |screens |over |stationary |screens |is |that |rotating |screens |generally |- |
CORRECT |ANSWER✔✔-Do |not |dam |the |flow
What |is |the |purpose |of |injecting |diffused |air |into |aerated |grit |chambers? |- |CORRECT |
ANSWER✔✔-To |lower |the |specific |gravity |of |water
What |is |accomplished |by |an |aerated |grit |chamber? |- |CORRECT |ANSWER✔✔-Grit |is |removed
Grit |is |washed |
Wastewater |is |freshened
When |using |cyclones |at |the |end |of |a |grit |removal |process |what |will |cause |a |decrease |in |grit |
removal |efficiency |in |the |cyclone? |- |CORRECT |ANSWER✔✔-Cyclone |inlet |pressure |too |low.
Increase |the |inlet |pressure |by |adjusting |the |grit |pump |discharge
What |should |an |operator |do |if |the |communicator |is |not |operating |properly? |- |CORRECT |
ANSWER✔✔-Check |the |motor |and |look |for |blockage |
Cut |off |the |electricity |
Lock |out |and |tag |the |breaker |
Place |the |bar |screen |into |service
