Exam (elaborations)
WASTEWATER PRACTICE EXAM QUESTIONS AND ANSWERS
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WASTEWATER PRACTICE EXAM QUESTIONS AND ANSWERS
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Name: Score:28 Multiple choice questions
Term 1 of 28
What diseases are caused by pathogenic organisms that may be present in raw wastewater?
Belt press, Drying beds, solid bowl centrifuge, and gravity thickener
Hepatitis, typhoid, paratyphoid, dysentery, and cholera
Irrigation, aquifer recharge, cooling towers and fire protection
Grease and roots
Term 2 of 28
What is the primary cause of stoppage in a collection system
grease and roots
total sedimentation test
potable drinking water
lift station
Term 3 of 28
Identify the 3 basic types of lift stations
Submersible
Dry, Wet and pneumatic
Potable drinking water
Grease and roots
,Term 4 of 28
What is typically used to dewater sludge?
Manual labor and hand shoveling of sludge
Belt press, Drying beds, solid bowl centrifuge, and gravity thickener
Chemical treatments and incineration processes
Transporting sludge to a landfill for disposal
Term 5 of 28
A centrifugal pump must be ? or it will not pump
Primed
Delineated
Anaerobic
Vented
Term 6 of 28
Odors occur when treatment becomes
Anaerobic
Pathogenic
V-knotch
Primed
Term 7 of 28
One common type of weir design for measuring flow is
V-Knotch
Total Sedimentation Test
Inverted Siphon
Anaerobic
, Term 8 of 28
Organic solids include
radioactive materials and heavy metals
metals and inorganic compounds
synthetic chemicals and plastic waste
organic materials from plant, animals or humans
Term 9 of 28
What treatment devices is commonly used to separate and remove large solids from raw
wastewater
a primary clarifier
a comminuter
a mechanically raked bar screen
a grit chamber
Term 10 of 28
Effluent dosage of chlorine in the contact chamber must produce a total combined residual of
?
1.0mg/L after 20 minutes
20%
1.0mg/l after 19 minutes
4 feet and 30 inches
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