WASTEWATER TREATMENT OPERATOR
EXAMINATION FINAL PAPER
QUESTIONS SOLUTIONS GRADED A+
◉ Over-greasing a pump motor can lead to damage. Answer: True
◉ A healthy digester gas consists mostly of hydrogen sulfide.
Answer: False
◉ Coliform results are reported as MPN/100 mL. Answer: True
◉ Increased concentrations of volatile acids and decreased alkalinity
are signs that the anaerobic digestion is in an ideal state. Answer:
False
◉ Breakpoint chlorination is the addition of chlorine to wastewater
until the chlorine demand has been met. Answer: True
◉ Zero calibration accuracy for DO probes and meters should be
checked with an absolute zero solution (sodium sulfite). Answer:
True
◉ Temperature, pH, and dissolved oxygen do not have to be
analyzed immediately
, because they can be preserved. Answer: False
◉ Sterilization is the goal of most wastewater treatment plants.
Answer: False
◉ One of the most common types of package plants is extended
aeration. Answer: True
◉ NDES permits are issued by the EPA or the state. Answer: True
◉ Hypochlorination will raise the pH of wastewater being treated.
Answer: True
◉ Denitrification does not cause sludge to rise in a secondary
clarifier. Answer: False
◉ The sludge digester can be either aerobic or anaerobic Answer:
True
◉ In order to protect your family from infectious disease, you should
not wear your work clothes home. Answer: True
◉ One application of centrifugal pumps is to lift raw wastewater.
Answer: True
EXAMINATION FINAL PAPER
QUESTIONS SOLUTIONS GRADED A+
◉ Over-greasing a pump motor can lead to damage. Answer: True
◉ A healthy digester gas consists mostly of hydrogen sulfide.
Answer: False
◉ Coliform results are reported as MPN/100 mL. Answer: True
◉ Increased concentrations of volatile acids and decreased alkalinity
are signs that the anaerobic digestion is in an ideal state. Answer:
False
◉ Breakpoint chlorination is the addition of chlorine to wastewater
until the chlorine demand has been met. Answer: True
◉ Zero calibration accuracy for DO probes and meters should be
checked with an absolute zero solution (sodium sulfite). Answer:
True
◉ Temperature, pH, and dissolved oxygen do not have to be
analyzed immediately
, because they can be preserved. Answer: False
◉ Sterilization is the goal of most wastewater treatment plants.
Answer: False
◉ One of the most common types of package plants is extended
aeration. Answer: True
◉ NDES permits are issued by the EPA or the state. Answer: True
◉ Hypochlorination will raise the pH of wastewater being treated.
Answer: True
◉ Denitrification does not cause sludge to rise in a secondary
clarifier. Answer: False
◉ The sludge digester can be either aerobic or anaerobic Answer:
True
◉ In order to protect your family from infectious disease, you should
not wear your work clothes home. Answer: True
◉ One application of centrifugal pumps is to lift raw wastewater.
Answer: True
