B LEVEL WASTEWATER EXAM
QUESTIONS AND ANSWERS 2026
MCRT - ANSWERSmean cell residence time
Capacitance - ANSWERSthe ability of a system to store an electric charge
Pressure in a digester - ANSWERS6 to 8 inches or 6-8 PSI
(T/F) SS only accept sewage from hospitals - ANSWERSFalse
(T/F)Activated sludge septum, uses biological treatment to remove waste -
ANSWERSTrue
(T/F) MCRT- length of time microorganism spend in an activated sludge process –
ANSWERSTrue
At a pump station, you find that the pumps are continuously pumping, the Wet well
indicator is showing high level, the Wet well is actually empty- what is the likely cause? -
ANSWERSBubbler is stopped up or there is a hole in the bubbler line
If the conveyor on a belt press is holding water in the middle what could be the issue? -
ANSWERSToo much product, the conveyor isn't moving fast enough
Best way to increase flocc size - ANSWERSAdd a chemical (polymer or coagulant)
vulnerability assessment - ANSWERSWhere are you go through and identify areas of
risk or identify hazards
Do you use a positive or negative pressure mask when using SCBA(self-contained
breathing apparatus)? - ANSWERSPositive
QUESTIONS AND ANSWERS 2026
MCRT - ANSWERSmean cell residence time
Capacitance - ANSWERSthe ability of a system to store an electric charge
Pressure in a digester - ANSWERS6 to 8 inches or 6-8 PSI
(T/F) SS only accept sewage from hospitals - ANSWERSFalse
(T/F)Activated sludge septum, uses biological treatment to remove waste -
ANSWERSTrue
(T/F) MCRT- length of time microorganism spend in an activated sludge process –
ANSWERSTrue
At a pump station, you find that the pumps are continuously pumping, the Wet well
indicator is showing high level, the Wet well is actually empty- what is the likely cause? -
ANSWERSBubbler is stopped up or there is a hole in the bubbler line
If the conveyor on a belt press is holding water in the middle what could be the issue? -
ANSWERSToo much product, the conveyor isn't moving fast enough
Best way to increase flocc size - ANSWERSAdd a chemical (polymer or coagulant)
vulnerability assessment - ANSWERSWhere are you go through and identify areas of
risk or identify hazards
Do you use a positive or negative pressure mask when using SCBA(self-contained
breathing apparatus)? - ANSWERSPositive
