Wastewater Operator Class 1 & 2 Practice Test
Exam With Complete Questions and
Answers|Already Graded A+|Assured Success
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 ANSWER-0.01 mg/L
The most severe penalties an operator can be subjected to for negligence and violation of EPA
regulations are: - CORRECT ANSWER-Civil or criminal penalties
In an active oxidation ditch, what flow can the operator control? - CORRECT ANSWER-Return sludge
flow and waste sludge flow
,What should the operator do when algae forms on a lagoon? - CORRECT ANSWER-Nothing, it
produces oxygen
Samples to be analyzed for ammonia can be held: - CORRECT ANSWER-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 ANSWER-Sludge
judge, sludge light, and core taker
What is the recommended way of keeping weed growth down in ponds? - CORRECT ANSWER-
Maintain a depth of at least 3 feet
What are stuffing boxes used for on a pump? - CORRECT ANSWER-To prevent air from being sucked
into the pump
Flow measurement system where flow stream contents are collected in container for fixed period of
time - CORRECT ANSWER-Timed gravimetric
Uses a strong oxidizer to break down organic material - CORRECT ANSWER-Chemically Oxidizable
Carbon (COD)
a measure of carbon dioxide given off when material is heated to 550° - CORRECT ANSWER-Total
Organic Carbon (TOC)
What is the recommended detention time for a primary clarifier? - CORRECT ANSWER-1 1/2 - 2
hours
What would be added to a lagoon/pond to subdue a strong odor and increase oxygen (O2)? -
CORRECT ANSWER-Sodium Nitrate
What is the maximum holding time for fecal coliform alanyses? - CORRECT ANSWER-6 hours
, What sort of system do lagoons/ponds form for the wastewater organix population? - CORRECT
ANSWER-Aerobic, Anaerobic, Facultative
What is the primary function of a brush aerator? - CORRECT ANSWER-To produce great dissolved
oxygen (DO)
If the first pond in a series operation is organically overloaded, how should the flow be controlled? -
CORRECT ANSWER-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 ANSWER-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
ANSWER-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
ANSWER-6.0 - 9.0 ppm
The explosive range of the main product of anaerobic digestion, methane, is in the range of: -
CORRECT ANSWER-5-15%
Recirculation in a tricking filter operation is sometimes used with trickling filters to: - CORRECT
ANSWER-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 ANSWER-To
prevent hydraulic & organic overloading of the digester and to keep sludge blankets down so that the
septic "floating" sludge will not result.
Exam With Complete Questions and
Answers|Already Graded A+|Assured Success
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 ANSWER-0.01 mg/L
The most severe penalties an operator can be subjected to for negligence and violation of EPA
regulations are: - CORRECT ANSWER-Civil or criminal penalties
In an active oxidation ditch, what flow can the operator control? - CORRECT ANSWER-Return sludge
flow and waste sludge flow
,What should the operator do when algae forms on a lagoon? - CORRECT ANSWER-Nothing, it
produces oxygen
Samples to be analyzed for ammonia can be held: - CORRECT ANSWER-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 ANSWER-Sludge
judge, sludge light, and core taker
What is the recommended way of keeping weed growth down in ponds? - CORRECT ANSWER-
Maintain a depth of at least 3 feet
What are stuffing boxes used for on a pump? - CORRECT ANSWER-To prevent air from being sucked
into the pump
Flow measurement system where flow stream contents are collected in container for fixed period of
time - CORRECT ANSWER-Timed gravimetric
Uses a strong oxidizer to break down organic material - CORRECT ANSWER-Chemically Oxidizable
Carbon (COD)
a measure of carbon dioxide given off when material is heated to 550° - CORRECT ANSWER-Total
Organic Carbon (TOC)
What is the recommended detention time for a primary clarifier? - CORRECT ANSWER-1 1/2 - 2
hours
What would be added to a lagoon/pond to subdue a strong odor and increase oxygen (O2)? -
CORRECT ANSWER-Sodium Nitrate
What is the maximum holding time for fecal coliform alanyses? - CORRECT ANSWER-6 hours
, What sort of system do lagoons/ponds form for the wastewater organix population? - CORRECT
ANSWER-Aerobic, Anaerobic, Facultative
What is the primary function of a brush aerator? - CORRECT ANSWER-To produce great dissolved
oxygen (DO)
If the first pond in a series operation is organically overloaded, how should the flow be controlled? -
CORRECT ANSWER-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 ANSWER-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
ANSWER-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
ANSWER-6.0 - 9.0 ppm
The explosive range of the main product of anaerobic digestion, methane, is in the range of: -
CORRECT ANSWER-5-15%
Recirculation in a tricking filter operation is sometimes used with trickling filters to: - CORRECT
ANSWER-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 ANSWER-To
prevent hydraulic & organic overloading of the digester and to keep sludge blankets down so that the
septic "floating" sludge will not result.
