Grade 2 Wastewater Exam Practice
Latest 2026-2027. Questions & Correct
Verified Answers. Graded A
A water filled mechanical pump seal not only helps to prevent leaks, but
also? - ANSacts as a lubricant for the pump shaft
aeration showing multiple clumps and bubbles. - ANSclogged or broken
diffusers
Aeration tank is building up with sludge what to do? - ANSDecrease RAS to
increase DT in secondary
Alarm system has been repaired but light isnt working? - ANScheck system
over again.
amber bottle is used for what? - ANSStore away from light to prevent
deterioration
calcium hypochlorite presents a combustion hazard in the presence of? -
ANSgrease
centrifugal pump spinning backwards? - ANSCheck Valve
1
, Dark thick foam - ANSExcessive solids/ old sludge age
Disease outbreak at a college has a kitchen sink hose connected to water
source? - ANSBack Siphon
disk one shows free swimmers, disk two shows stalk ciliates and disk 3
shows rotifiers and nematodes. - ANSNormal growth
DO probe drops in level what should you do first? - ANScheck accuracy of
probe
Electrical pressure going through circuit breaker while closed. - ANSvoltage
Excess biofilm leaves a fixed media process by? - ANSsloughing
Healthy sludge indicator organism? - ANSMetazoa
How do you clean a polymer spill? - ANSHousehold bleach
How do you increase flushing for trickling filter? - ANSRecycle flow
How do you transfer and store 1 Ton chlorine container? - ANSTransfer
horizontally and store horizontally
How to prevent piston wear on a pump? - ANSLong strokes with slower
speeds
2
Latest 2026-2027. Questions & Correct
Verified Answers. Graded A
A water filled mechanical pump seal not only helps to prevent leaks, but
also? - ANSacts as a lubricant for the pump shaft
aeration showing multiple clumps and bubbles. - ANSclogged or broken
diffusers
Aeration tank is building up with sludge what to do? - ANSDecrease RAS to
increase DT in secondary
Alarm system has been repaired but light isnt working? - ANScheck system
over again.
amber bottle is used for what? - ANSStore away from light to prevent
deterioration
calcium hypochlorite presents a combustion hazard in the presence of? -
ANSgrease
centrifugal pump spinning backwards? - ANSCheck Valve
1
, Dark thick foam - ANSExcessive solids/ old sludge age
Disease outbreak at a college has a kitchen sink hose connected to water
source? - ANSBack Siphon
disk one shows free swimmers, disk two shows stalk ciliates and disk 3
shows rotifiers and nematodes. - ANSNormal growth
DO probe drops in level what should you do first? - ANScheck accuracy of
probe
Electrical pressure going through circuit breaker while closed. - ANSvoltage
Excess biofilm leaves a fixed media process by? - ANSsloughing
Healthy sludge indicator organism? - ANSMetazoa
How do you clean a polymer spill? - ANSHousehold bleach
How do you increase flushing for trickling filter? - ANSRecycle flow
How do you transfer and store 1 Ton chlorine container? - ANSTransfer
horizontally and store horizontally
How to prevent piston wear on a pump? - ANSLong strokes with slower
speeds
2
