WasteWater Operator Certification Study Guide
Grade 1 Exam 2025–2026 Accurate Real Exam
Questions and Verified Correct Answers JUST
RELEASED
Water is used as a standard because it has unique properties and is readily available in its
pure state. Which standard is not correct?
a. Celsius scale
b. the calorie
c. the kilogram
d. specific gravity
the kilogram
Basic Chemistry:
What acids are formed when water reacts with nonmetal oxides?
a. acid hydroxides
b. acid anhydrides
c. acid oxides
d. acid hydrates
acid anhydrides
Basic Chemistry:
Which one of the following is not a hydrate:
a. alum
,b. blue nitrate
c. sodium nitrate
d. ferrous sulfate
sodium nitrate
The maximum holding time for preserved BOD5 samples is
2 days
Sampling, testing & reporting
Which one fo the following tests is least likely to effectively help an operator control a
waste plant's process?
BOD 5
Sampling, testing & reporting
The maximum holding time for a preserved total suspended solids sample is:
7 days
Sampling, testing & reporting
Generally, the state regulatory body must be notified of all unusual or extraordinary
discharges by telephone within:
24 hours
Sampling, testing & reporting
Generally, the state regulatory body must be notified for any noncompliance that could
adversely affect that state's waters or that could endanger public health within:
24 hours
Maintenance:
, Electromotive force (emf) is also known as
voltage
Maintenance:
Electron flow is measure in
amps
Maintenance:
what type of fuses would most likely be used to protect a meter?
dual-element fuses
Safety:
What class of fire involves electrical equipment?
class c
Safety:
When a permit is required to enter a confined space, who may sign the permit?
entry supervisor
Safety:
Which one of the following is a measure of a materials' opposition to the flow of electric
current?
ohms
Safety:
What class of fire involves oil and grease?
class B
Grade 1 Exam 2025–2026 Accurate Real Exam
Questions and Verified Correct Answers JUST
RELEASED
Water is used as a standard because it has unique properties and is readily available in its
pure state. Which standard is not correct?
a. Celsius scale
b. the calorie
c. the kilogram
d. specific gravity
the kilogram
Basic Chemistry:
What acids are formed when water reacts with nonmetal oxides?
a. acid hydroxides
b. acid anhydrides
c. acid oxides
d. acid hydrates
acid anhydrides
Basic Chemistry:
Which one of the following is not a hydrate:
a. alum
,b. blue nitrate
c. sodium nitrate
d. ferrous sulfate
sodium nitrate
The maximum holding time for preserved BOD5 samples is
2 days
Sampling, testing & reporting
Which one fo the following tests is least likely to effectively help an operator control a
waste plant's process?
BOD 5
Sampling, testing & reporting
The maximum holding time for a preserved total suspended solids sample is:
7 days
Sampling, testing & reporting
Generally, the state regulatory body must be notified of all unusual or extraordinary
discharges by telephone within:
24 hours
Sampling, testing & reporting
Generally, the state regulatory body must be notified for any noncompliance that could
adversely affect that state's waters or that could endanger public health within:
24 hours
Maintenance:
, Electromotive force (emf) is also known as
voltage
Maintenance:
Electron flow is measure in
amps
Maintenance:
what type of fuses would most likely be used to protect a meter?
dual-element fuses
Safety:
What class of fire involves electrical equipment?
class c
Safety:
When a permit is required to enter a confined space, who may sign the permit?
entry supervisor
Safety:
Which one of the following is a measure of a materials' opposition to the flow of electric
current?
ohms
Safety:
What class of fire involves oil and grease?
class B
