Exam (elaborations)
WASTE WATER OPERATOR LV 1 EXAM PREP QUESTIONS AND ANSWERS
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WASTE WATER OPERATOR LV 1 EXAM PREP QUESTIONS AND ANSWERS
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Name: Score:49 Multiple choice questions
Term 1 of 49
Normal and abnormal operational procedures as well as start-up and shut down procedures
for barminutors are different from those used for comminutors
T/F
True
False
Term 2 of 49
The first clarifier that wastewater flows into is called a secondary clarifier
T/F
True
False
Term 3 of 49
What is a storm sewer?
A pipe or conduit intended to carry wastewater or water borne waste from homes,
businesses, and industries to the treatment plant
A separate pipe, conduit or open channel that carries runoff from storms, surface
drainage and street wash. but does not include domestic waste
A sewer designed to carry both sanitary wastewater and stormwater
The seepage of groundwater into a sewer system inducing service connections
,Term 4 of 49
pH generally will be affected significantly by a clarifier
T/F
True
False
Term 5 of 49
What is the purpose of pre-aeration?
To freshen the wastewater and separate oils
To help operators learn how the activated sludge process works
To pre-disinfect the wastewater
To remove nutrients prior to BOD removal
Term 6 of 49
Wastewater entering a treatment plant typically is...
Somewhat warmer than tap water
The same temp. as tap water
Somewhat cooler than tap water
Very cooler than tap water
Term 7 of 49
Anaerobic decomposition of wastewater produces...
Ammonium chloride
Hydrogen sulfide
Carbon monoxide
Copper sulfate
,Term 8 of 49
What is the name for the biological slime growth that develops on the trickling filter media?
Biosolids
Schmutzdecke
Volatile acid film
Zoogleal film
Term 9 of 49
Entrained air frequently contributes to...
Reduced wet well capacity
Less odor around the pump station
Lower electrical costs
Pump cavitation
Term 10 of 49
What are aerobic bacteria?
Bacteria capable of spreading disease
Bacteria that cause algae to bloom
Bacteria that live and reproduce only in an environment containing no free or dissolved
oxygen
Bacteria that live and reproduce only in an environment containing oxygen that is
available for their respiration
Term 11 of 49
In most activated sludge plants the waste activated sludge is pumped to waste sludge
handling facilities
T/F
True
False
, Term 12 of 49
Since reaction rates are lower during the winter, the operator of an activated sludge plant will
usually...
Increase dissolved oxygen levels
Decrease MCRT
Decrease wasting
Increase MCRT
Term 13 of 49
Special care and safety must be practiced when visitors are taken through your treatment plant
T/F
True
False
Term 14 of 49
Alkalinity is a measure of the ability of wastewater to...
Neutralize base
Neutralize acid
Dissolve organics
Maintain constant temperature
Term 15 of 49
Which of the following test would give the fastest indication of toxicity in an activated sludge
process?
Oxygen Uptake Rate (OUR)
Settleometer
MLSS
Microscopic Observation
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