WASTEWATER OPERATOR CLASS 1 & 2 PRACTICE TEST
QUESTIONS WITH DETAILED VERIFIED AND 100%
ACCURATE ANSWERS
Flow measurement system where flow stream contents are collected in
container for fixed period of time Correct Answers Timed gravimetric
Uses a strong oxidizer to break down organic material Correct Answers
Chemically Oxidizable Carbon (COD)
a measure of carbon dioxide given off when material is heated to 550°
Correct Answers Total Organic Carbon (TOC)
What is the recommended detention time for a primary clarifier? Correct
Answers 1 1/2 - 2 hours
What would be added to a lagoon/pond to subdue a strong odor and
increase oxygen (O2)? Correct Answers Sodium Nitrate
What is the maximum holding time for fecal coliform alanyses? Correct
Answers 6 hours
What sort of system do lagoons/ponds form for the wastewater organix
population? Correct Answers Aerobic, Anaerobic, Facultative
What is the primary function of a brush aerator? Correct Answers To
produce great dissolved oxygen (DO)
,If the first pond in a series operation is organically overloaded, how
should the flow be controlled? Correct Answers They should be
switched to parallel operation
What should the operator do with plants/weeds growing along the
water's edge with respect to ponds? Correct Answers Remove them as
they appear to avoid the establishment of a deep root system
How should lantern rings be installed on the stuffing box as part of a
pump unit? Correct Answers Completely filled with grease before all the
rings of packing are in place.
What are the pH parameters outlined by KPDES in the process of
wastewater treatment? Correct Answers 6.0 - 9.0 ppm
The explosive range of the main product of anaerobic digestion,
methane, is in the range of: Correct Answers 5-15%
Recirculation in a tricking filter operation is sometimes used with
trickling filters to: Correct Answers Keep the media wet during low flow
periods, dilute the organic strength of the influent, and smooth out
diurnal flow fluctuations
Small quantities of sludge should be pumped often in primary clarifiers
to: Correct Answers To prevent hydraulic & organic overloading of the
, digester and to keep sludge blankets down so that the septic "floating"
sludge will not result.
In an active oxidation ditch, how long should a measured amount of
wastewater treated before going to the next stage? Correct Answers 18-
36 hours
Fish such as salmon and trout cannon tolerate more than trace amounts
of chlorine. therefore, a total residual chlorine monthly limits for zero
flow streams are set at: Correct Answers 0.01 mg/L
The most severe penalties an operator can be subjected to for negligence
and violation of EPA regulations are: Correct Answers Civil or criminal
penalties
In an active oxidation ditch, what flow can the operator control? Correct
Answers Return sludge flow and waste sludge flow
What should the operator do when algae forms on a lagoon? Correct
Answers Nothing, it produces oxygen
Samples to be analyzed for ammonia can be held: Correct Answers 28
days, preserved with H2SO4 (Sulfiric acid) to a pH <2.0 at 4°C
Sludge blanket depths may be measured by using what instrument(s)
Correct Answers Sludge judge, sludge light, and core taker
QUESTIONS WITH DETAILED VERIFIED AND 100%
ACCURATE ANSWERS
Flow measurement system where flow stream contents are collected in
container for fixed period of time Correct Answers Timed gravimetric
Uses a strong oxidizer to break down organic material Correct Answers
Chemically Oxidizable Carbon (COD)
a measure of carbon dioxide given off when material is heated to 550°
Correct Answers Total Organic Carbon (TOC)
What is the recommended detention time for a primary clarifier? Correct
Answers 1 1/2 - 2 hours
What would be added to a lagoon/pond to subdue a strong odor and
increase oxygen (O2)? Correct Answers Sodium Nitrate
What is the maximum holding time for fecal coliform alanyses? Correct
Answers 6 hours
What sort of system do lagoons/ponds form for the wastewater organix
population? Correct Answers Aerobic, Anaerobic, Facultative
What is the primary function of a brush aerator? Correct Answers To
produce great dissolved oxygen (DO)
,If the first pond in a series operation is organically overloaded, how
should the flow be controlled? Correct Answers They should be
switched to parallel operation
What should the operator do with plants/weeds growing along the
water's edge with respect to ponds? Correct Answers Remove them as
they appear to avoid the establishment of a deep root system
How should lantern rings be installed on the stuffing box as part of a
pump unit? Correct Answers Completely filled with grease before all the
rings of packing are in place.
What are the pH parameters outlined by KPDES in the process of
wastewater treatment? Correct Answers 6.0 - 9.0 ppm
The explosive range of the main product of anaerobic digestion,
methane, is in the range of: Correct Answers 5-15%
Recirculation in a tricking filter operation is sometimes used with
trickling filters to: Correct Answers Keep the media wet during low flow
periods, dilute the organic strength of the influent, and smooth out
diurnal flow fluctuations
Small quantities of sludge should be pumped often in primary clarifiers
to: Correct Answers To prevent hydraulic & organic overloading of the
, digester and to keep sludge blankets down so that the septic "floating"
sludge will not result.
In an active oxidation ditch, how long should a measured amount of
wastewater treated before going to the next stage? Correct Answers 18-
36 hours
Fish such as salmon and trout cannon tolerate more than trace amounts
of chlorine. therefore, a total residual chlorine monthly limits for zero
flow streams are set at: Correct Answers 0.01 mg/L
The most severe penalties an operator can be subjected to for negligence
and violation of EPA regulations are: Correct Answers Civil or criminal
penalties
In an active oxidation ditch, what flow can the operator control? Correct
Answers Return sludge flow and waste sludge flow
What should the operator do when algae forms on a lagoon? Correct
Answers Nothing, it produces oxygen
Samples to be analyzed for ammonia can be held: Correct Answers 28
days, preserved with H2SO4 (Sulfiric acid) to a pH <2.0 at 4°C
Sludge blanket depths may be measured by using what instrument(s)
Correct Answers Sludge judge, sludge light, and core taker
