1|Page
WASTE WATER OPERATOR CERTIFICATION GRADE
1 NEWEST 2026/2027 ACTUAL VERIFIED EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+||NEWEST EXAM!!!
How long can a dissolved oxygen sample wait for analysis
using the modified Winkler method, if it is preserved with
sulfuric acid? - ANSWER-8 hr
Sampling, testing & reporting
BOD5 samples can be preserved by - ANSWER-storing
them in a refrigerator above freezing and up to 4 degrees
C
Sampling, testing & reporting
The maximum holding time for preserved BOD5 samples
is - ANSWER-2 days
Sampling, testing & reporting
,2|Page
Which one fo the following tests is least likely to effectively
help an operator control a waste plant's process? -
ANSWER-BOD 5
Sampling, testing & reporting
The maximum holding time for a preserved total
suspended solids sample is: - ANSWER-7 days
Sampling, testing & reporting
Generally, the state regulatory body must be notified of all
unusual or extraordinary discharges by telephone within: -
ANSWER-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: -
ANSWER-24 hours
Maintenance:
, 3|Page
Electromotive force (emf) is also known as - ANSWER-
voltage
Maintenance:
Electron flow is measure in - ANSWER-amps
Maintenance:
what type of fuses would most likely be used to protect a
meter? - ANSWER-dual-element fuses
Safety:
What class of fire involves electrical equipment? -
ANSWER-class c
Safety:
When a permit is required to enter a confined space, who
may sign the permit? - ANSWER-entry supervisor
WASTE WATER OPERATOR CERTIFICATION GRADE
1 NEWEST 2026/2027 ACTUAL VERIFIED EXAM
COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+||NEWEST EXAM!!!
How long can a dissolved oxygen sample wait for analysis
using the modified Winkler method, if it is preserved with
sulfuric acid? - ANSWER-8 hr
Sampling, testing & reporting
BOD5 samples can be preserved by - ANSWER-storing
them in a refrigerator above freezing and up to 4 degrees
C
Sampling, testing & reporting
The maximum holding time for preserved BOD5 samples
is - ANSWER-2 days
Sampling, testing & reporting
,2|Page
Which one fo the following tests is least likely to effectively
help an operator control a waste plant's process? -
ANSWER-BOD 5
Sampling, testing & reporting
The maximum holding time for a preserved total
suspended solids sample is: - ANSWER-7 days
Sampling, testing & reporting
Generally, the state regulatory body must be notified of all
unusual or extraordinary discharges by telephone within: -
ANSWER-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: -
ANSWER-24 hours
Maintenance:
, 3|Page
Electromotive force (emf) is also known as - ANSWER-
voltage
Maintenance:
Electron flow is measure in - ANSWER-amps
Maintenance:
what type of fuses would most likely be used to protect a
meter? - ANSWER-dual-element fuses
Safety:
What class of fire involves electrical equipment? -
ANSWER-class c
Safety:
When a permit is required to enter a confined space, who
may sign the permit? - ANSWER-entry supervisor
