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WASTE WATER OPERATOR LV 1 EXAM PREP QUESTIONS AND ANSWERS $9.00   Add to cart

Exam (elaborations)

WASTE WATER OPERATOR LV 1 EXAM PREP QUESTIONS AND ANSWERS

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  • Course
  • Wastewater / Sewage Treatment
  • Institution
  • Wastewater / Sewage Treatment

WASTE WATER OPERATOR LV 1 EXAM PREP QUESTIONS AND ANSWERS

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  • September 20, 2024
  • 40
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Wastewater / Sewage Treatment
  • Wastewater / Sewage Treatment
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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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