Wastewater Treatment Operator Certification Test 3 || || || || || ||
with verified detailed answers
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The typical suspended solids removal rate in the primary clarifier is 5 to 10%
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True or False - correct answer✔✔False (v.1 pg 129)
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Over-greasing a pump motor can lead to damage.
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True or False - correct answer✔✔True (v.2 pg 404)
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A healthy digester gas consists mostly of hydrogen sulfide.
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True or False - correct answer✔✔False (v.2 pg 158)
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Coliform results are reported as MPN/100 ml
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True or False - correct answer✔✔True (v.2 pg 556)
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Increased concentrations of volatile acids and decreased alkalinity are signs that the
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anaerobic digestion is in an ideal state.
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True or False - correct answer✔✔False (v.2 pg 523)
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,Breakpoint chlorination is the addition of chlorine to wastewater until the chlorine demand
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has been met.
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True or False - correct answer✔✔True (v.1 pg 351)
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Zero calibration accuracy for DO probes and meters should be checked with an absolute
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zero solution (sodium sulfite)
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True or False - correct answer✔✔True
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Temperature, pH, and dissolved oxygen do not have to be analyzed immediately because
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they can be preserved.
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True or False - correct answer✔✔False (v.2 pg 499,502)
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Sterilization is the goal of most wastewater treatment plants
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True or False - correct answer✔✔False (v.1 pg 54)
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One of the most common types of packaged plants is extended aeration
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True or False - correct answer✔✔True (v.1 pg 257)
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NPDES permits are issued by the EPA or the state
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True or False - correct answer✔✔True
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, Hypochlorination will raise the pH of wastewater being treated || || || || || || || ||
True or False - correct answer✔✔True (v.1 pg 351)
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Denitrification does not cause sludge to rise in a secondary clarifier
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True or False - correct answer✔✔False (v.2 pg 73)
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The sludge digester can be either aerobic or anaerobic
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True or False - correct answer✔✔True (v.2 pg 148,217
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In order to protect your family from infectious disease, you should not wear your work
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clothes home. ||
True or False - correct answer✔✔True (v.2 pg 266)
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One application of centrifugal pumps is to lift raw wastewater.
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True or False - correct answer✔✔True
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BOD and suspended solids are measured using grab samples
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True or False - correct answer✔✔False(v.1 pg 317)
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Algae uses carbon dioxide in the pond to produce free oxygen for the aerobic bacteria.
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with verified detailed answers
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The typical suspended solids removal rate in the primary clarifier is 5 to 10%
|| || || || || || || || || || || || ||
True or False - correct answer✔✔False (v.1 pg 129)
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Over-greasing a pump motor can lead to damage.
|| || || || || || ||
True or False - correct answer✔✔True (v.2 pg 404)
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A healthy digester gas consists mostly of hydrogen sulfide.
|| || || || || || || ||
True or False - correct answer✔✔False (v.2 pg 158)
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Coliform results are reported as MPN/100 ml
|| || || || || ||
True or False - correct answer✔✔True (v.2 pg 556)
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Increased concentrations of volatile acids and decreased alkalinity are signs that the
|| || || || || || || || || || || ||
anaerobic digestion is in an ideal state.
|| || || || || || ||
True or False - correct answer✔✔False (v.2 pg 523)
|| || || || || || || ||
,Breakpoint chlorination is the addition of chlorine to wastewater until the chlorine demand
|| || || || || || || || || || || || ||
has been met.
|| || ||
True or False - correct answer✔✔True (v.1 pg 351)
|| || || || || || || ||
Zero calibration accuracy for DO probes and meters should be checked with an absolute
|| || || || || || || || || || || || || ||
zero solution (sodium sulfite)
|| || ||
True or False - correct answer✔✔True
|| || || || ||
Temperature, pH, and dissolved oxygen do not have to be analyzed immediately because
|| || || || || || || || || || || || ||
they can be preserved.
|| || ||
True or False - correct answer✔✔False (v.2 pg 499,502)
|| || || || || || || ||
Sterilization is the goal of most wastewater treatment plants
|| || || || || || || ||
True or False - correct answer✔✔False (v.1 pg 54)
|| || || || || || || ||
One of the most common types of packaged plants is extended aeration
|| || || || || || || || || || ||
True or False - correct answer✔✔True (v.1 pg 257)
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NPDES permits are issued by the EPA or the state
|| || || || || || || || ||
True or False - correct answer✔✔True
|| || || || ||
, Hypochlorination will raise the pH of wastewater being treated || || || || || || || ||
True or False - correct answer✔✔True (v.1 pg 351)
|| || || || || || || ||
Denitrification does not cause sludge to rise in a secondary clarifier
|| || || || || || || || || ||
True or False - correct answer✔✔False (v.2 pg 73)
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The sludge digester can be either aerobic or anaerobic
|| || || || || || || ||
True or False - correct answer✔✔True (v.2 pg 148,217
|| || || || || || || ||
In order to protect your family from infectious disease, you should not wear your work
|| || || || || || || || || || || || || || ||
clothes home. ||
True or False - correct answer✔✔True (v.2 pg 266)
|| || || || || || || ||
One application of centrifugal pumps is to lift raw wastewater.
|| || || || || || || || ||
True or False - correct answer✔✔True
|| || || || ||
BOD and suspended solids are measured using grab samples
|| || || || || || || ||
True or False - correct answer✔✔False(v.1 pg 317)
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Algae uses carbon dioxide in the pond to produce free oxygen for the aerobic bacteria.
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