WASTEWATER OPERATOR UPDATED EXAM SCRIPT
QUESTIONS AND ANSWERS RATED A+
✔✔What do total solids consist of?
A. Dissolved and settleable
B. Floatable and settlable
C. Suspended and dissolved
D. Settlable and nonsettleable - ✔✔C. Suspended and dissolved
✔✔What would cause excessive wear on bearing?
A. Misalignment
B. Reduced Oil due to low viscosity
C. Blow seal
D. Over tubercation - ✔✔A. Misalignment
✔✔Amperometric titration is used to measure
A. Dissolved solids
B. Chlorine residual
C. Colloids
D. Emulsions - ✔✔B. Chlorine residual
✔✔What growth phase is an aerobic digester operated in.
A. Log
B. Lag
C. Endogenous respiration
D. Declining phase - ✔✔C. Endogenous respiration
✔✔If excessive pressure builds up in a chlorine tank due to excessive heat. What will
prevent explosions?
A. Valve seat adjustments
B. Heat reducing valve
C. Fusible plug
D. Check valve - ✔✔C. Fusible plug
✔✔You notice that your bearings are excessively hot on a pump, why?
A. Ambient temperature too high
B. Over lubrication
C. Oil seal blown
,D. Discharge rate too low - ✔✔B. Over lubrication
✔✔Where can you gain access for collection system maintenance?
A. Lift station
B. Force main
C. Man hole
D. Gravity main - ✔✔C. Man hole
✔✔Low DO and nutrient deficiency will promote the growth of what?
A. Rotifers
B. Filamentous bacteria
C. Spirillium
D. Amoebas - ✔✔B. Filamentous bacteria
✔✔When charging a lead-acid type battery for a composite sampler, what dangerous
gas could be produced?
A. Hydrogen
B. Oxygen
C. Hydrogen sulfide
D. Cyanide - ✔✔A. Hydrogen
✔✔What is the best method in dealing with a chemical spill?
A. Contain and clean up
B. Saw dust and kitty litter
C. Foam congaing super trimethyl bromine
D. Flood with water - ✔✔A. Contain and clean up
✔✔There is septic wastewater entering your primary clarifier. What is the problem?
A. Aerobic conditions in the collections system
B. Lift station pumps operating on short cycles
C. Anaerobic conditions in the collections systems
D. High flows due to a low MCRT - ✔✔C. Anaerobic condition in the collections system
✔✔Which of the following substances is highly viscous and very slippery?
A. Calcium hypochlorite
B. Calcium oxide
C. Potassium permanganate
D. Polymer - ✔✔D. Polymer
, ✔✔If you pump green sludge to a drying bed what chemical should be applied?
A. Polymer
B. Lime
C. Cl2
D. Alum - ✔✔B. Lime
✔✔Chlorine leaks can be detected by?
A. ISCBA
B. Ammonia solution with Q-Tip
C. Alcohol vapor
D. Spray with mist of water - ✔✔B. Ammonia solution with Q-Tip
✔✔What takes place in the stabilization tank in a contact stabilization plant?
A. Adsorption
B. Clarification
C. BNR
D. Absorption - ✔✔D. Absorption
✔✔Why is an aerobic digester covered?
A. Hold in gas
B. Protect for contaminants
C. Reduce radiation
D. Protect from cold weather - ✔✔D. Protect from cold weather
✔✔Which of the following would you not use a grab sample on?
A. BOD
B. DO
C. pH
D. Temp - ✔✔A. BOD
✔✔Staffing is based on what?
A. Budget
B. Flow and type of treatment
C. City Hall
D. Chief operator - ✔✔B. Flow and type of treatment
✔✔What condition does an operator have the least amount of control over?
QUESTIONS AND ANSWERS RATED A+
✔✔What do total solids consist of?
A. Dissolved and settleable
B. Floatable and settlable
C. Suspended and dissolved
D. Settlable and nonsettleable - ✔✔C. Suspended and dissolved
✔✔What would cause excessive wear on bearing?
A. Misalignment
B. Reduced Oil due to low viscosity
C. Blow seal
D. Over tubercation - ✔✔A. Misalignment
✔✔Amperometric titration is used to measure
A. Dissolved solids
B. Chlorine residual
C. Colloids
D. Emulsions - ✔✔B. Chlorine residual
✔✔What growth phase is an aerobic digester operated in.
A. Log
B. Lag
C. Endogenous respiration
D. Declining phase - ✔✔C. Endogenous respiration
✔✔If excessive pressure builds up in a chlorine tank due to excessive heat. What will
prevent explosions?
A. Valve seat adjustments
B. Heat reducing valve
C. Fusible plug
D. Check valve - ✔✔C. Fusible plug
✔✔You notice that your bearings are excessively hot on a pump, why?
A. Ambient temperature too high
B. Over lubrication
C. Oil seal blown
,D. Discharge rate too low - ✔✔B. Over lubrication
✔✔Where can you gain access for collection system maintenance?
A. Lift station
B. Force main
C. Man hole
D. Gravity main - ✔✔C. Man hole
✔✔Low DO and nutrient deficiency will promote the growth of what?
A. Rotifers
B. Filamentous bacteria
C. Spirillium
D. Amoebas - ✔✔B. Filamentous bacteria
✔✔When charging a lead-acid type battery for a composite sampler, what dangerous
gas could be produced?
A. Hydrogen
B. Oxygen
C. Hydrogen sulfide
D. Cyanide - ✔✔A. Hydrogen
✔✔What is the best method in dealing with a chemical spill?
A. Contain and clean up
B. Saw dust and kitty litter
C. Foam congaing super trimethyl bromine
D. Flood with water - ✔✔A. Contain and clean up
✔✔There is septic wastewater entering your primary clarifier. What is the problem?
A. Aerobic conditions in the collections system
B. Lift station pumps operating on short cycles
C. Anaerobic conditions in the collections systems
D. High flows due to a low MCRT - ✔✔C. Anaerobic condition in the collections system
✔✔Which of the following substances is highly viscous and very slippery?
A. Calcium hypochlorite
B. Calcium oxide
C. Potassium permanganate
D. Polymer - ✔✔D. Polymer
, ✔✔If you pump green sludge to a drying bed what chemical should be applied?
A. Polymer
B. Lime
C. Cl2
D. Alum - ✔✔B. Lime
✔✔Chlorine leaks can be detected by?
A. ISCBA
B. Ammonia solution with Q-Tip
C. Alcohol vapor
D. Spray with mist of water - ✔✔B. Ammonia solution with Q-Tip
✔✔What takes place in the stabilization tank in a contact stabilization plant?
A. Adsorption
B. Clarification
C. BNR
D. Absorption - ✔✔D. Absorption
✔✔Why is an aerobic digester covered?
A. Hold in gas
B. Protect for contaminants
C. Reduce radiation
D. Protect from cold weather - ✔✔D. Protect from cold weather
✔✔Which of the following would you not use a grab sample on?
A. BOD
B. DO
C. pH
D. Temp - ✔✔A. BOD
✔✔Staffing is based on what?
A. Budget
B. Flow and type of treatment
C. City Hall
D. Chief operator - ✔✔B. Flow and type of treatment
✔✔What condition does an operator have the least amount of control over?
