Grade 2 CWEA wastewater exam practice questions with correct
answers A+ Grade 2026\2027
when testing for phosphorous which zone has the least amount?
- correct answer end of aerobic zone
what is the standard sample volume for BOD5?
- correct answer 300 ML
what is the best valve for a lime slurry line?
- correct answer Gate valve
What is the best valve to throttle flow?
- correct answer Butterfly valve
What part of the pump doesnt move?
- correct answer Stator
organic load is rising, what should you do?
- correct answer Reduce the WAS rate by an amount less than 10% a day.
What does TKN compose of?
- correct answer organic nitrogen and ammonia nitrogen
What is the first test that should be ran on a composite sample?
- correct answer dissolved oxygen or CBOD
Alarm system has been repaired but light isnt working?
- correct answer check system over again.
, When checking chains and sprockets during rounds
- correct answer check covers/enclosed
what pipe is used for chlorine gas or liquid?
- correct answer PVC
Suction lift pressure can be measured by?
- correct answer the center line of the hydraulic part of the pump down to the water surface on the
suction side of the pump.
What does vector mean for biosolids?
- correct answer organisms, such as rodents and insects, that can spread disease by carrying and
transferring pathogens.
calcium hypochlorite presents a combustion hazard in the presence of?
- correct answer grease
if TKN is 7.14 what is the return ratio?
- correct answer 3.57 is half
selecting a lubricating oil?
- correct answer service factor
sulfuric acid chemical formula?
- correct answer H2SO4
Most common type of activated sludge plant?
- correct answer Extended aeration
centrifugal pump spinning backwards?
- correct answer Check Valve
answers A+ Grade 2026\2027
when testing for phosphorous which zone has the least amount?
- correct answer end of aerobic zone
what is the standard sample volume for BOD5?
- correct answer 300 ML
what is the best valve for a lime slurry line?
- correct answer Gate valve
What is the best valve to throttle flow?
- correct answer Butterfly valve
What part of the pump doesnt move?
- correct answer Stator
organic load is rising, what should you do?
- correct answer Reduce the WAS rate by an amount less than 10% a day.
What does TKN compose of?
- correct answer organic nitrogen and ammonia nitrogen
What is the first test that should be ran on a composite sample?
- correct answer dissolved oxygen or CBOD
Alarm system has been repaired but light isnt working?
- correct answer check system over again.
, When checking chains and sprockets during rounds
- correct answer check covers/enclosed
what pipe is used for chlorine gas or liquid?
- correct answer PVC
Suction lift pressure can be measured by?
- correct answer the center line of the hydraulic part of the pump down to the water surface on the
suction side of the pump.
What does vector mean for biosolids?
- correct answer organisms, such as rodents and insects, that can spread disease by carrying and
transferring pathogens.
calcium hypochlorite presents a combustion hazard in the presence of?
- correct answer grease
if TKN is 7.14 what is the return ratio?
- correct answer 3.57 is half
selecting a lubricating oil?
- correct answer service factor
sulfuric acid chemical formula?
- correct answer H2SO4
Most common type of activated sludge plant?
- correct answer Extended aeration
centrifugal pump spinning backwards?
- correct answer Check Valve
