BASIC WASTEWATER OPERATOR
PRACTICE TEST EXAM NEWEST
2026/2027 STUDY QUESTIONS WITH
VERIFIED CORRECT ANSWERS 100%
GUARANTEED PASS | RATED A+
,BASIC WASTEWATER OPERATOR PRACTICE TEST EXAM
NEWEST 2026/2027 STUDY QUESTIONS WITH VERIFIED
CORRECT ANSWERS 100% GUARANTEED PASS | RATED A+
A horizontal centrifugal pump has "rope" packing. When the pump is operation water slowly
drips from the packing glad. What does this indicate?
a. the packing bolts or nuts on the packing gland are properly adjusted
b. the packing bolts or nuts on the packing gland are not properly adjusted
c. the pump needs more coolant
d. the pump is not operating efficiently - Answer>>> a. the packing bolts or nuts on the packing
gland are properly adjusted
When you install a new packing gland, you notice that there is a slow, steady stream of water
flow coming out of the packing area. What is this an indication of?
a. you need more packing
b. you need to tighten the bolts until no water is leaking out
c. normal operation
d. you need to loosen the bolts until a fast, heavy stream of water is spraying out of the packing -
Answer>>> c. normal operation
What would most likely cause a submersible pump to an AMP reading that is above the optimum
level?
A. nothing, pumps normally run highs AMPs
b. clogged impeller
,c. low voltage at power supply
d. low flow to pump station - Answer>>> b. clogged impeller
If your activated sludge plant begins to nitrify, what conditions would you expect to decrease?
A. settling in clarifiers
B. chlorine demand
C. BOD effluent
D. TSS in effluent - Answer>>> a. settling in the clarifiers
In an RBC plant, the microscopic investigation revealed some amoebas and flagellates in the first
set of discs, the second set showed free-swimming ciliates and some rotifers, the third set had
blood worms and nematodes. What is this an indication of?
a. normal operation
b. toxic waste entering the plant
c. flow running too slow through discs
d. flow running too fast - Answer>>> c. flow running too slow through discs
How do you calibrate a chemical feed pump?
A. by measuring the pump output
B. using the SWAG method
C. jar test
D. with a microscope - Answer>>> A. by measuring the pump output
What is the purpose of heating and mixing a primary anaerobic digester?
, a. to slow down the digestion rate
b. to increase the digestion rate
c. to allow for more room in the digester
d. to increase effluent quality - Answer>>> b. to increase the digestion rate
What is the chemical formula for sulfuric acid?
a. HNO3
b. HCl
c. NaOH
d. H2SO4 - Answer>>> d. H2SO4
Why is mechanical ventilation of a lift station required?
a. to minimize the presence of harmful gases
b. it is not
c. to allow for easy access to the pit
d. because the EPD requires it - Answer>>> a. to minimize the presence of harmful gases
How is voltage reduced when required in electrical circuits?
a. a transformer is used
b. drop one leg of the power coming in
c. add a leg to the power supply
d. a generator is used - Answer>>> a. a transformer is used
PRACTICE TEST EXAM NEWEST
2026/2027 STUDY QUESTIONS WITH
VERIFIED CORRECT ANSWERS 100%
GUARANTEED PASS | RATED A+
,BASIC WASTEWATER OPERATOR PRACTICE TEST EXAM
NEWEST 2026/2027 STUDY QUESTIONS WITH VERIFIED
CORRECT ANSWERS 100% GUARANTEED PASS | RATED A+
A horizontal centrifugal pump has "rope" packing. When the pump is operation water slowly
drips from the packing glad. What does this indicate?
a. the packing bolts or nuts on the packing gland are properly adjusted
b. the packing bolts or nuts on the packing gland are not properly adjusted
c. the pump needs more coolant
d. the pump is not operating efficiently - Answer>>> a. the packing bolts or nuts on the packing
gland are properly adjusted
When you install a new packing gland, you notice that there is a slow, steady stream of water
flow coming out of the packing area. What is this an indication of?
a. you need more packing
b. you need to tighten the bolts until no water is leaking out
c. normal operation
d. you need to loosen the bolts until a fast, heavy stream of water is spraying out of the packing -
Answer>>> c. normal operation
What would most likely cause a submersible pump to an AMP reading that is above the optimum
level?
A. nothing, pumps normally run highs AMPs
b. clogged impeller
,c. low voltage at power supply
d. low flow to pump station - Answer>>> b. clogged impeller
If your activated sludge plant begins to nitrify, what conditions would you expect to decrease?
A. settling in clarifiers
B. chlorine demand
C. BOD effluent
D. TSS in effluent - Answer>>> a. settling in the clarifiers
In an RBC plant, the microscopic investigation revealed some amoebas and flagellates in the first
set of discs, the second set showed free-swimming ciliates and some rotifers, the third set had
blood worms and nematodes. What is this an indication of?
a. normal operation
b. toxic waste entering the plant
c. flow running too slow through discs
d. flow running too fast - Answer>>> c. flow running too slow through discs
How do you calibrate a chemical feed pump?
A. by measuring the pump output
B. using the SWAG method
C. jar test
D. with a microscope - Answer>>> A. by measuring the pump output
What is the purpose of heating and mixing a primary anaerobic digester?
, a. to slow down the digestion rate
b. to increase the digestion rate
c. to allow for more room in the digester
d. to increase effluent quality - Answer>>> b. to increase the digestion rate
What is the chemical formula for sulfuric acid?
a. HNO3
b. HCl
c. NaOH
d. H2SO4 - Answer>>> d. H2SO4
Why is mechanical ventilation of a lift station required?
a. to minimize the presence of harmful gases
b. it is not
c. to allow for easy access to the pit
d. because the EPD requires it - Answer>>> a. to minimize the presence of harmful gases
How is voltage reduced when required in electrical circuits?
a. a transformer is used
b. drop one leg of the power coming in
c. add a leg to the power supply
d. a generator is used - Answer>>> a. a transformer is used
