WasteWater Operator class C exam
practice review questions with correct
answers
When |Chlorine |is |combined |with |water |what |type |of |pipe |should |be |used?
A. |Ductile |iron
B. |Asbestos |concrete
C. |PVC
D. |Carbon |Steel |- |CORRECT |ANSWER✔✔-C. |PVC
A |good |settling |sludge |would |consist |of |what |type |of |protozoa?
A. |Rotifers |and |nematodes
B. |Amoebas |and |Flagellates
C. |Stalked |ciliates |and |mastagoria
D. |Free |swimmers |and |stalk |ciliates |- |CORRECT |ANSWER✔✔-D. |Free |swimmers |and |stalk |
ciliates
What |is |Phenolphylein |used |for |in |titration
A. |Oxidizer
B. |Indicator
,C. |Acid |reducer |to |lower |pH
D. |Applicator |- |CORRECT |ANSWER✔✔-B. |Indicator
Your |plant |has |an |influent |of |220 |BOD |and |163 |TSS, |and |an |effluent |of |10 |BOD, |and |6 |TSS. |
What |is |the |BOD |removal |efficiency |in |your |plant?
A. |92%
B. |94%
C. |95%
D. |96% |- |CORRECT |ANSWER✔✔-C. |95%
You |suspect |your |anaerobic |digester |is |going |sour. |What |is |the |best |way |to |verify |its |
condition?
A. |pH
B. |Foam |type
C. |VA/ALK |ratio
D. |DO |- |CORRECT |ANSWER✔✔-C. |VA/ALK |ratio
Before |operating |any |piece |of |equipment |what |should |be |done?
A. |Lock |out |Tag |out |(remember, |safety |first!)
B. |Read |O |& |M |manual
C. |Read |manufacturers |manual
D. |Notify |supervisor |- |CORRECT |ANSWER✔✔-C. |Read |manufacturers |manual
Detritus |is |noticed |in |your |grit |channel. |What |is |the |problem?
, A. |Velocity |too |fast |with |short |D/T
B. |Velocity |too |low |with |long |D/T
C. |Short |circuiting
D. |Density |currents |- |CORRECT |ANSWER✔✔-B. |Velocity |too |low |with |long |D/T
What |is |considered |normal |operation |of |an |aerobic |digester?
A. |Fill |react
B. |Skim |off |foam |when |needed
C. |Settle |and |Decant |as |needed
D. |Feed |only |during |low |flow |or |constant |when |the |sun |is |out |- |CORRECT |ANSWER✔✔-C. |
Settle |and |Decant |as |needed
A |plant |with |a |flow |of |1 |MGD |should |be |monitored
A. |Continuously
B. |Intermittently
C. |Daily
D. |Every |four |hours |depending |on |surface |load |- |CORRECT |ANSWER✔✔-A. |Continuously
What |do |total |solids |consist |of?
A. |Dissolved |and |settleable
B. |Floatable |and |settlable
C. |Suspended |and |dissolved
practice review questions with correct
answers
When |Chlorine |is |combined |with |water |what |type |of |pipe |should |be |used?
A. |Ductile |iron
B. |Asbestos |concrete
C. |PVC
D. |Carbon |Steel |- |CORRECT |ANSWER✔✔-C. |PVC
A |good |settling |sludge |would |consist |of |what |type |of |protozoa?
A. |Rotifers |and |nematodes
B. |Amoebas |and |Flagellates
C. |Stalked |ciliates |and |mastagoria
D. |Free |swimmers |and |stalk |ciliates |- |CORRECT |ANSWER✔✔-D. |Free |swimmers |and |stalk |
ciliates
What |is |Phenolphylein |used |for |in |titration
A. |Oxidizer
B. |Indicator
,C. |Acid |reducer |to |lower |pH
D. |Applicator |- |CORRECT |ANSWER✔✔-B. |Indicator
Your |plant |has |an |influent |of |220 |BOD |and |163 |TSS, |and |an |effluent |of |10 |BOD, |and |6 |TSS. |
What |is |the |BOD |removal |efficiency |in |your |plant?
A. |92%
B. |94%
C. |95%
D. |96% |- |CORRECT |ANSWER✔✔-C. |95%
You |suspect |your |anaerobic |digester |is |going |sour. |What |is |the |best |way |to |verify |its |
condition?
A. |pH
B. |Foam |type
C. |VA/ALK |ratio
D. |DO |- |CORRECT |ANSWER✔✔-C. |VA/ALK |ratio
Before |operating |any |piece |of |equipment |what |should |be |done?
A. |Lock |out |Tag |out |(remember, |safety |first!)
B. |Read |O |& |M |manual
C. |Read |manufacturers |manual
D. |Notify |supervisor |- |CORRECT |ANSWER✔✔-C. |Read |manufacturers |manual
Detritus |is |noticed |in |your |grit |channel. |What |is |the |problem?
, A. |Velocity |too |fast |with |short |D/T
B. |Velocity |too |low |with |long |D/T
C. |Short |circuiting
D. |Density |currents |- |CORRECT |ANSWER✔✔-B. |Velocity |too |low |with |long |D/T
What |is |considered |normal |operation |of |an |aerobic |digester?
A. |Fill |react
B. |Skim |off |foam |when |needed
C. |Settle |and |Decant |as |needed
D. |Feed |only |during |low |flow |or |constant |when |the |sun |is |out |- |CORRECT |ANSWER✔✔-C. |
Settle |and |Decant |as |needed
A |plant |with |a |flow |of |1 |MGD |should |be |monitored
A. |Continuously
B. |Intermittently
C. |Daily
D. |Every |four |hours |depending |on |surface |load |- |CORRECT |ANSWER✔✔-A. |Continuously
What |do |total |solids |consist |of?
A. |Dissolved |and |settleable
B. |Floatable |and |settlable
C. |Suspended |and |dissolved
