Wastewater Grade 2 Study Latest
2026-2027. Questions & Correct
Verified Answers. Graded A
1 mg/L is the same as 1 part per billion (ppb).
a. True
b. False - ANSb
A common range for the pH of raw domestic wastewater is 6.8 to 8.0.
a. True
b. False - ANSa
A Discharge Monitoring Report is typically submitted to the regulatory
agency on a daily basis.
a. True
b. False - ANSb
A facultative bacteria is capable of living under an aerobic condition but not
in an anaerobic condition.
a. True
b. False - ANSb
A gear pump is a common type of positive displacement pump.
a. True
1
,b. False - ANSa
A grab sample is most suited for these constituents.
a. BOD
b. TSS
c. Suspended solids concentration
d. Residual chlorine - ANSd
A healthy digester gas consists mostly of hydrogen sulfide.
a. True
b. False - ANSb
A manhole sump or vault can be entered without following confined space
entry procedures if it appears safe.
a. True
b. False - ANSb
A mechanical seal is used to prevent leaks between the pump casing and
shaft.
a. True
b. False - ANSa
A pond with a detention time of less than three days will perform similar to:
a. Sedimentation tank
b. Aeration tank
2
,c. Trickling filter
d. RBC - ANSa
A SCADA system is capable of monitoring and controlling equipment from
a remote location.
a. True
b. False - ANSa
A slight seal leakage should be observed when a pump is operating to
keep the packings cool.
a. True
b. False - ANSa
A solution with a pH of 13 is a strong base.
a. True
b. False - ANSa
A trickling filter is a type of activated sludge process usually operated in the
extended aeration mode.
a. True
b. False - ANSb
Abnormal operation in a pond will not occur if it is overloaded with BOD.
a. True
b. False - ANSb
Algae growth will be faster when there is less sunlight.
3
, a. True
b. False - ANSb
Algae is not essential to the successful operation of both aerobic and
facultative ponds.
a. True
b. False - ANSb
Algae uses carbon dioxide in the pond to produce free oxygen for the
aerobic bacteria.
a. True
b. False - ANSa
Alkalinity is the capacity of a liquid to neutralize acid.
a. True
b. False - ANSa
Alkalinity is the capacity of a liquid to neutralize base.
a. True
b. False - ANSb
All microorganisms cause disease.
a. True
b. False - ANSb
Always pour water into acid and never the other way around.
a. True
4
2026-2027. Questions & Correct
Verified Answers. Graded A
1 mg/L is the same as 1 part per billion (ppb).
a. True
b. False - ANSb
A common range for the pH of raw domestic wastewater is 6.8 to 8.0.
a. True
b. False - ANSa
A Discharge Monitoring Report is typically submitted to the regulatory
agency on a daily basis.
a. True
b. False - ANSb
A facultative bacteria is capable of living under an aerobic condition but not
in an anaerobic condition.
a. True
b. False - ANSb
A gear pump is a common type of positive displacement pump.
a. True
1
,b. False - ANSa
A grab sample is most suited for these constituents.
a. BOD
b. TSS
c. Suspended solids concentration
d. Residual chlorine - ANSd
A healthy digester gas consists mostly of hydrogen sulfide.
a. True
b. False - ANSb
A manhole sump or vault can be entered without following confined space
entry procedures if it appears safe.
a. True
b. False - ANSb
A mechanical seal is used to prevent leaks between the pump casing and
shaft.
a. True
b. False - ANSa
A pond with a detention time of less than three days will perform similar to:
a. Sedimentation tank
b. Aeration tank
2
,c. Trickling filter
d. RBC - ANSa
A SCADA system is capable of monitoring and controlling equipment from
a remote location.
a. True
b. False - ANSa
A slight seal leakage should be observed when a pump is operating to
keep the packings cool.
a. True
b. False - ANSa
A solution with a pH of 13 is a strong base.
a. True
b. False - ANSa
A trickling filter is a type of activated sludge process usually operated in the
extended aeration mode.
a. True
b. False - ANSb
Abnormal operation in a pond will not occur if it is overloaded with BOD.
a. True
b. False - ANSb
Algae growth will be faster when there is less sunlight.
3
, a. True
b. False - ANSb
Algae is not essential to the successful operation of both aerobic and
facultative ponds.
a. True
b. False - ANSb
Algae uses carbon dioxide in the pond to produce free oxygen for the
aerobic bacteria.
a. True
b. False - ANSa
Alkalinity is the capacity of a liquid to neutralize acid.
a. True
b. False - ANSa
Alkalinity is the capacity of a liquid to neutralize base.
a. True
b. False - ANSb
All microorganisms cause disease.
a. True
b. False - ANSb
Always pour water into acid and never the other way around.
a. True
4
