LEVEL II WASTEWATER TREATMENT
PRACTICE TEST EXAM SCRIPT 2026
COMPLETE QUESTIONS AND CORRECT
ANSWERS
◉ What subjects are covered in the Grade II examination? Answer: The
Grade II examination includes basic safety practices, hazards in
wastewater treatment, sampling and analysis, operation and maintenance
of treatment processes, anaerobic digestion, disinfection, secondary unit
processes, sludge handling, and basic supervision responsibilities.
◉ What is the passing score for the Grade I examination? Answer: To
pass the Grade I examination, a candidate must achieve a minimum total
score of 94.5 points (70 percent) and at least 20 points (50 percent) on
the Math Questions.
◉ What is the passing score for the Grade II examination? Answer: To
pass the Grade II examination, a candidate must achieve a minimum
total score of 105 points (70 percent) and at least 20 points (50 percent)
on the Math Questions.
◉ What is the format of the Grade I examination? Answer: The Grade I
examination consists of 45 True/False questions (1 point each), 25
Multiple Choice questions (2 points each), and 10 Math Problems (4
points each), totaling 135 points.
, ◉ What is the format of the Grade II examination? Answer: The Grade
II examination consists of 50 True/False questions (1 point each), 30
Multiple Choice questions (2 points each), and 10 Math Problems (4
points each), totaling 150 points.
◉ What is the purpose of a grit chamber? Answer: A grit chamber is
designed to remove grit and heavy particles from wastewater to prevent
damage to downstream equipment.
◉ What is the main function of aerobic digesters? Answer: Aerobic
digesters primarily facilitate the breakdown of organic matter in the
presence of oxygen, producing carbon dioxide and water.
◉ What is coliform bacteria? Answer: Coliform bacteria are a group of
microorganisms found in the environment, human, and animal feces,
often used as an indicator of water quality and potential contamination.
◉ What is the role of an inlet baffle in a settling tank? Answer: An inlet
baffle in a settling tank helps to disperse incoming flow, reducing
turbulence and allowing for better sedimentation of solids.
◉ What does BOD stand for? Answer: BOD stands for Biochemical
Oxygen Demand, which measures the amount of oxygen required by
microorganisms to decompose organic matter in water.
PRACTICE TEST EXAM SCRIPT 2026
COMPLETE QUESTIONS AND CORRECT
ANSWERS
◉ What subjects are covered in the Grade II examination? Answer: The
Grade II examination includes basic safety practices, hazards in
wastewater treatment, sampling and analysis, operation and maintenance
of treatment processes, anaerobic digestion, disinfection, secondary unit
processes, sludge handling, and basic supervision responsibilities.
◉ What is the passing score for the Grade I examination? Answer: To
pass the Grade I examination, a candidate must achieve a minimum total
score of 94.5 points (70 percent) and at least 20 points (50 percent) on
the Math Questions.
◉ What is the passing score for the Grade II examination? Answer: To
pass the Grade II examination, a candidate must achieve a minimum
total score of 105 points (70 percent) and at least 20 points (50 percent)
on the Math Questions.
◉ What is the format of the Grade I examination? Answer: The Grade I
examination consists of 45 True/False questions (1 point each), 25
Multiple Choice questions (2 points each), and 10 Math Problems (4
points each), totaling 135 points.
, ◉ What is the format of the Grade II examination? Answer: The Grade
II examination consists of 50 True/False questions (1 point each), 30
Multiple Choice questions (2 points each), and 10 Math Problems (4
points each), totaling 150 points.
◉ What is the purpose of a grit chamber? Answer: A grit chamber is
designed to remove grit and heavy particles from wastewater to prevent
damage to downstream equipment.
◉ What is the main function of aerobic digesters? Answer: Aerobic
digesters primarily facilitate the breakdown of organic matter in the
presence of oxygen, producing carbon dioxide and water.
◉ What is coliform bacteria? Answer: Coliform bacteria are a group of
microorganisms found in the environment, human, and animal feces,
often used as an indicator of water quality and potential contamination.
◉ What is the role of an inlet baffle in a settling tank? Answer: An inlet
baffle in a settling tank helps to disperse incoming flow, reducing
turbulence and allowing for better sedimentation of solids.
◉ What does BOD stand for? Answer: BOD stands for Biochemical
Oxygen Demand, which measures the amount of oxygen required by
microorganisms to decompose organic matter in water.
