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Hawaii Wastewater Treatment Operator Grade 1 Exam
ACTUAL VERIFIED EXAM COMPLETE QUESTIONS
AND CORRECT ANSWERS|| NEWEST EXAM!!!
Basic WasteWater Treatment:
Scum is usually removed in the _____treatment stage -
Answer-primary
Basic WasteWater Treatment:
When domestic wastewater enters natural waters, what
species deplete most of the oxygen - Answer-aerobic
bacteria
Basic WasteWater Treatment:
Once the oxygen is depleted in a natural body of water,
which organisms take over? - Answer-anaerobic
Basic WasteWater Treatment:
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The major gas produces by anaerobic decomposition is -
Answer-methane
Wastewater Treatment Facilities:
Another name for primary treatment is - Answer-
sedimentation
Wastewater Treatment Facilities:
Digester gas is_______when mixed with air the the proper
proportions - Answer-extremely explosive
Wastewater Treatment Facilities:
A pond that is used to treat raw wastewater is called -
Answer-a waste stabilization pond
Wastewater Treatment Facilities:
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A pond that has an aerobic top layer and an anaerobic
bottom layer is called - Answer-a facultative pond
Preliminary Treatment:
What is the angle of the bars on a manually cleaned bar
screen? - Answer-30 degrees
Preliminary Treatment:
What is the angle of the bards on a mechanically cleaned
bar screen - Answer-45-60 degrees
Preliminary Treatment:
What is the ideal wastewater velocity in FPS through a
screen channel? - Answer-1.5ft/s
Preliminary Treatment:
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What is the ideal wastewater velocity in FPS for grit
removal in a grit chamber - Answer-1.0 ft/s
Preliminary Treatment:
In general, what is the water content of screen material -
Answer-80%
Preliminary Treatment:
What is the wastewater velocity range in FPS for grit
removal in a grit chamber? - Answer-0.7 - 1.4 ft/s
Racks, screens, comminutors and Grit removal:
Which one of the following chemicals gives water its
greatest capacity to neutralize acids? - Answer-hydroxide
Racks, screens, comminutors and Grit removal:
Hawaii Wastewater Treatment Operator Grade 1 Exam
ACTUAL VERIFIED EXAM COMPLETE QUESTIONS
AND CORRECT ANSWERS|| NEWEST EXAM!!!
Basic WasteWater Treatment:
Scum is usually removed in the _____treatment stage -
Answer-primary
Basic WasteWater Treatment:
When domestic wastewater enters natural waters, what
species deplete most of the oxygen - Answer-aerobic
bacteria
Basic WasteWater Treatment:
Once the oxygen is depleted in a natural body of water,
which organisms take over? - Answer-anaerobic
Basic WasteWater Treatment:
,2|Page
The major gas produces by anaerobic decomposition is -
Answer-methane
Wastewater Treatment Facilities:
Another name for primary treatment is - Answer-
sedimentation
Wastewater Treatment Facilities:
Digester gas is_______when mixed with air the the proper
proportions - Answer-extremely explosive
Wastewater Treatment Facilities:
A pond that is used to treat raw wastewater is called -
Answer-a waste stabilization pond
Wastewater Treatment Facilities:
,3|Page
A pond that has an aerobic top layer and an anaerobic
bottom layer is called - Answer-a facultative pond
Preliminary Treatment:
What is the angle of the bars on a manually cleaned bar
screen? - Answer-30 degrees
Preliminary Treatment:
What is the angle of the bards on a mechanically cleaned
bar screen - Answer-45-60 degrees
Preliminary Treatment:
What is the ideal wastewater velocity in FPS through a
screen channel? - Answer-1.5ft/s
Preliminary Treatment:
, 4|Page
What is the ideal wastewater velocity in FPS for grit
removal in a grit chamber - Answer-1.0 ft/s
Preliminary Treatment:
In general, what is the water content of screen material -
Answer-80%
Preliminary Treatment:
What is the wastewater velocity range in FPS for grit
removal in a grit chamber? - Answer-0.7 - 1.4 ft/s
Racks, screens, comminutors and Grit removal:
Which one of the following chemicals gives water its
greatest capacity to neutralize acids? - Answer-hydroxide
Racks, screens, comminutors and Grit removal:
