Waste Water Treatment 6C Exam Prep questions with
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verified detailed answers || ||
What is used for Phosphorus Testing? - correct answer✔✔Stannous Chloride
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When sludge is incinerated what is the reduction in volume? - correct answer✔✔80%-90%
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Four 8" pipes carry the same volume as? - correct answer✔✔One 16" pipe
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In backwashing of a mixed media filter, there is a bed expansion of how much? - correct
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answer✔✔10%
when water temperature increases the settling rate in a clarifier does what? - correct
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answer✔✔Decreases
Before being used, a tertiary filter should be what? - correct answer✔✔Backwashed
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Coliform bacteria is More or Less resistant to chlorination than pathological bacteria? -
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correct answer✔✔More ||
What are always required for installing couplings? - correct answer✔✔Precision
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Assembling Device ||
When an Air Flotation Unit is turned off, drain valves should be opened when? - correct
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answer✔✔Only if it will be off for a long time || || || || || || || || ||
, Industrial Discharge for pre-treatment must meet specifications within? - correct
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answer✔✔3 Years ||
Phenolic wastes are treated with what? - correct answer✔✔Chlorine
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A centrifugal pump is running hot, a decrease in flow through the pump will do what? -
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correct answer✔✔Lower the Temperature|| || ||
How often should air masks be inspected? - correct answer✔✔Every 6 Months
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What is the order from top to bottom for filtered materials? - correct answer✔✔Coal, Sand,
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Garnet (CGS) ||
Microbial Growth rate does what? - correct answer✔✔Increase rapidly in a short period,
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then decreases as sludge age increases
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Wire to Water Efficiency includes which measurements? - correct answer✔✔Motor +
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Pump efficiency ||
If a trickling filter is restarted when the temp is under 55 Degrees, how long will it take to
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reach full level of treatment? - correct answer✔✔4 - 9 Weeks
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How do you start up an anaerobic digester? - correct answer✔✔Half way with seed sludge,
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then add raw sludge slowly
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The term schedule 40, schedule 80, etc. is a measurement of what in terms of steel or plastic
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pipes? - correct answer✔✔Wall Thickness
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verified detailed answers || ||
What is used for Phosphorus Testing? - correct answer✔✔Stannous Chloride
|| || || || || || || || ||
When sludge is incinerated what is the reduction in volume? - correct answer✔✔80%-90%
|| || || || || || || || || || || ||
Four 8" pipes carry the same volume as? - correct answer✔✔One 16" pipe
|| || || || || || || || || || || ||
In backwashing of a mixed media filter, there is a bed expansion of how much? - correct
|| || || || || || || || || || || || || || || || ||
answer✔✔10%
when water temperature increases the settling rate in a clarifier does what? - correct
|| || || || || || || || || || || || || ||
answer✔✔Decreases
Before being used, a tertiary filter should be what? - correct answer✔✔Backwashed
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Coliform bacteria is More or Less resistant to chlorination than pathological bacteria? -
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correct answer✔✔More ||
What are always required for installing couplings? - correct answer✔✔Precision
|| || || || || || || || || ||
Assembling Device ||
When an Air Flotation Unit is turned off, drain valves should be opened when? - correct
|| || || || || || || || || || || || || || || ||
answer✔✔Only if it will be off for a long time || || || || || || || || ||
, Industrial Discharge for pre-treatment must meet specifications within? - correct
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answer✔✔3 Years ||
Phenolic wastes are treated with what? - correct answer✔✔Chlorine
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A centrifugal pump is running hot, a decrease in flow through the pump will do what? -
|| || || || || || || || || || || || || || || || ||
correct answer✔✔Lower the Temperature|| || ||
How often should air masks be inspected? - correct answer✔✔Every 6 Months
|| || || || || || || || || || ||
What is the order from top to bottom for filtered materials? - correct answer✔✔Coal, Sand,
|| || || || || || || || || || || || || || ||
Garnet (CGS) ||
Microbial Growth rate does what? - correct answer✔✔Increase rapidly in a short period,
|| || || || || || || || || || || || ||
then decreases as sludge age increases
|| || || || ||
Wire to Water Efficiency includes which measurements? - correct answer✔✔Motor +
|| || || || || || || || || || ||
Pump efficiency ||
If a trickling filter is restarted when the temp is under 55 Degrees, how long will it take to
|| || || || || || || || || || || || || || || || || || ||
reach full level of treatment? - correct answer✔✔4 - 9 Weeks
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How do you start up an anaerobic digester? - correct answer✔✔Half way with seed sludge,
|| || || || || || || || || || || || || || ||
then add raw sludge slowly
|| || || ||
The term schedule 40, schedule 80, etc. is a measurement of what in terms of steel or plastic
|| || || || || || || || || || || || || || || || ||
pipes? - correct answer✔✔Wall Thickness
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