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WASTE WATER TREATMENT 6C EXAM PREP QUESTIONS AND ANSWERS
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WASTE WATER TREATMENT 6C EXAM PREP QUESTIONS AND ANSWERS
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Name: Score:83 Multiple choice questions
Term 1 of 83
What do you add to neutralize basic wastewater?
Sulfuric Acid
Hydrochloric Acid
Sulfur Dioxide
Chlorine
Term 2 of 83
In a belt filter what are three stages in order of occurrence?
Lower The Temperature
The Respiration Rate
Gravity, Low Pressure, High Pressure
Indicates The Motor And Pump Efficiency
Term 3 of 83
A centrifugal pump is running hot, a decrease in flow through the pump will do what?
Lower the Temperature
Remove the Catalyst
Higher the Temperature
Changes in Ph
,Term 4 of 83
The term schedule 40, schedule 80, etc. is a measurement of what in terms of steel or plastic
pipes?
Wall Thickness
Outside Diameter
Inside Diameter
Pipe Diameter
Term 5 of 83
How do you increase grease removal from a primary clarifier?
Pre-Aeration
Biosorption
Disinfection
Screening
Term 6 of 83
What is the proper pH for good nitrification?
6.5
3.5
8.5
7.5
Term 7 of 83
In a final clarifier, small, very light, almost transplant, fluffy sludge rising. What is this?
Straggler Floc
35% - 45%
Rising Sludge
Decreases
,Term 8 of 83
The pressure in pump tests is what?
Absolute Pressure
Gauge Pressure
Atmospheric Pressure
Differential Pressure
Term 9 of 83
Pump drives are overpowered by at least which percent?
20%
10%
15%
50%
Term 10 of 83
What is the return capacity of a 10 MGD plant?
110 Mgd
15 Mgd
10 MGD
5 Mgd
Term 11 of 83
Why are bottles in a lab made of colored glass?
Improper backwashing and surface washing
Lower the temperature
Slowly over several hours
Keep contents from light
, Term 12 of 83
If the needle on a D.O. meter pulses, what's that mean?
The Respiration Rate
Membrane Needs Replacement
Precision Assembling Device
Lower The Temperature
Term 13 of 83
What's the most likely cause of a clarifier problem if clumps of sludge are rising, bubbles are
visible on the surface and settleometer readings are normal initially but rise about two hours
later?
Denitrification
Ammonification
Nitrogen Fixation
Lack Of Engine Cooling
Term 14 of 83
Coliform bacteria is More or Less resistant to chlorination than pathological bacteria?
Chlorine
10%
More
Decreases
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