WASTEWATER D LICENSE ACTUAL EXAM
2025 WITH 300 EXAM QUESTIONS AND
100% CORRECT ANSWERS | VERIFIED
ANSWERS | ALREADY GRADED A+ |
GUARANTEED SUCCESS | WASTEWATER D
LICENSE FINAL LATEST EXAM 2025
[BRAND NEW]
What are the 3 main components in fertilizer that are in sludge? - ANSWER-
nitrogen, potassium, phosphorus
Application of the various soil and plant sciences to soil management and crop
production, scientific agriculture - ANSWER- Agronomy
If the filter fecal test is run, what color would the fecal coliform show up as? -
ANSWER- blue
What is another name for non-filterable solids? - ANSWER- suspended solids
If you switch any lead on a three phase motor, what is the result on the motor
rotation? - ANSWER- it will reverse rotation
What type of plant has these steps: MLSS in aeration, MLSS no aeration, MLSS in
aeration? - ANSWER- step feed aeration
,the electromotive force (EMF) and is the electrical pressure available to cause a
flow of current (amperage) when an electrical current is closed - ANSWER-
voltage
Where is the appropriate place to store a self contained breathing apparatus
(SCBA)? - ANSWER- an approved casing hanging outside a chlorination room
and unlocked
How do you measure the amount of CL2 available in cylinders? - ANSWER- the
cylinders are on scales, you determine the beginning weight and subtract the
remaining balance to give you the available Cl2
What is the chemical symbol for chlorine? - ANSWER- Cl
Two pumps are parallel to each other. Each one produces 300 gpm with 100 ft
head. What would be the combined gpm? - ANSWER- over 300 gpm but less than
600gpm
What is the purpose of thickening sludge? - ANSWER- to make it economically
feasible
What is the significant problem of having scum on the top of a pond? - ANSWER-
it prevents sunlight from penetrating the algae
How far should a sewer line be from a water main? - ANSWER- 50' separation or
10' horizontal and 18'' separation of sewer lines to water lines when they cross or
meet at joints
,What is the best way to get rid of algae? - ANSWER- the first choice is
chlorinating or alternative use is copper sulfate
In what measurements is fecal reported? - ANSWER- the MPN in Colony Forming
Units (CFU) in per 100 mL
How many PPB equals one PPM? - ANSWER- One thousand parts per billion
equals one part per million
If the bubbler system air supply line at the wet well is clogged, what will this cause
the pump to do? - ANSWER- Pressure build up in the supply line would signal
more water column then there really was, causing the pump to run longer than
necessary, possibly not kick off and run continually
If the bubbler system air supply line at the wet well has a hole in it above the water
level, what will this cause the pump to do? - ANSWER- It would cause a low
pressure reading showing a lower water level then there really is, or possible not
even kicking on the pump
What is the best way to keep within the operating budget? - ANSWER- keep list of
purchases and expenses to date during fiscal year
comparisons should be made with budget allocations to avoid excess purchases
review purchases monthly and compare to budget
If a diaphragm pump has 2 check valves open, what will the pump do? -
ANSWER- It would not pump properly because 1 check valve should be shut
while the other is open
, Flow velocity of _ ft/sec is necessary in a sewer to prevent solids from settling and
accumulating on the bottom - ANSWER- 2
Fresh waste water is usually slightly _________ - ANSWER- alkaline
_____ is necessary for the proper functioning of a stabilization of oxidization
ponds. - ANSWER- algae
_____________ pump motors can be damaged by overloading caused by operating
the pump with too low discharge pressure. - ANSWER- centrifugal
Samples for making lab tests should be ______________ of the sewage to be
tested. - ANSWER- representative
__ is measured in mg/L and the ______ cone is measured in mL/L - ANSWER-
DO
Imhoff
____ is added to water to increase the pH - ANSWER- lime
If acid is spilled on the floor, immediately wash with _____ and neutralize with
______ ________________. - ANSWER- water
sodium bicarbonate (baking soda)
______ in digesters occurs when sludge withdrawal is too fast - ANSWER- coning
_______________ ponds are aerobic on top (oxygen present) and anaerobic
(oxygen not present) on bottom - ANSWER- facultative
2025 WITH 300 EXAM QUESTIONS AND
100% CORRECT ANSWERS | VERIFIED
ANSWERS | ALREADY GRADED A+ |
GUARANTEED SUCCESS | WASTEWATER D
LICENSE FINAL LATEST EXAM 2025
[BRAND NEW]
What are the 3 main components in fertilizer that are in sludge? - ANSWER-
nitrogen, potassium, phosphorus
Application of the various soil and plant sciences to soil management and crop
production, scientific agriculture - ANSWER- Agronomy
If the filter fecal test is run, what color would the fecal coliform show up as? -
ANSWER- blue
What is another name for non-filterable solids? - ANSWER- suspended solids
If you switch any lead on a three phase motor, what is the result on the motor
rotation? - ANSWER- it will reverse rotation
What type of plant has these steps: MLSS in aeration, MLSS no aeration, MLSS in
aeration? - ANSWER- step feed aeration
,the electromotive force (EMF) and is the electrical pressure available to cause a
flow of current (amperage) when an electrical current is closed - ANSWER-
voltage
Where is the appropriate place to store a self contained breathing apparatus
(SCBA)? - ANSWER- an approved casing hanging outside a chlorination room
and unlocked
How do you measure the amount of CL2 available in cylinders? - ANSWER- the
cylinders are on scales, you determine the beginning weight and subtract the
remaining balance to give you the available Cl2
What is the chemical symbol for chlorine? - ANSWER- Cl
Two pumps are parallel to each other. Each one produces 300 gpm with 100 ft
head. What would be the combined gpm? - ANSWER- over 300 gpm but less than
600gpm
What is the purpose of thickening sludge? - ANSWER- to make it economically
feasible
What is the significant problem of having scum on the top of a pond? - ANSWER-
it prevents sunlight from penetrating the algae
How far should a sewer line be from a water main? - ANSWER- 50' separation or
10' horizontal and 18'' separation of sewer lines to water lines when they cross or
meet at joints
,What is the best way to get rid of algae? - ANSWER- the first choice is
chlorinating or alternative use is copper sulfate
In what measurements is fecal reported? - ANSWER- the MPN in Colony Forming
Units (CFU) in per 100 mL
How many PPB equals one PPM? - ANSWER- One thousand parts per billion
equals one part per million
If the bubbler system air supply line at the wet well is clogged, what will this cause
the pump to do? - ANSWER- Pressure build up in the supply line would signal
more water column then there really was, causing the pump to run longer than
necessary, possibly not kick off and run continually
If the bubbler system air supply line at the wet well has a hole in it above the water
level, what will this cause the pump to do? - ANSWER- It would cause a low
pressure reading showing a lower water level then there really is, or possible not
even kicking on the pump
What is the best way to keep within the operating budget? - ANSWER- keep list of
purchases and expenses to date during fiscal year
comparisons should be made with budget allocations to avoid excess purchases
review purchases monthly and compare to budget
If a diaphragm pump has 2 check valves open, what will the pump do? -
ANSWER- It would not pump properly because 1 check valve should be shut
while the other is open
, Flow velocity of _ ft/sec is necessary in a sewer to prevent solids from settling and
accumulating on the bottom - ANSWER- 2
Fresh waste water is usually slightly _________ - ANSWER- alkaline
_____ is necessary for the proper functioning of a stabilization of oxidization
ponds. - ANSWER- algae
_____________ pump motors can be damaged by overloading caused by operating
the pump with too low discharge pressure. - ANSWER- centrifugal
Samples for making lab tests should be ______________ of the sewage to be
tested. - ANSWER- representative
__ is measured in mg/L and the ______ cone is measured in mL/L - ANSWER-
DO
Imhoff
____ is added to water to increase the pH - ANSWER- lime
If acid is spilled on the floor, immediately wash with _____ and neutralize with
______ ________________. - ANSWER- water
sodium bicarbonate (baking soda)
______ in digesters occurs when sludge withdrawal is too fast - ANSWER- coning
_______________ ponds are aerobic on top (oxygen present) and anaerobic
(oxygen not present) on bottom - ANSWER- facultative
