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Waste Water Treatment 6C Exam Prep
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Waste Water Treatment 6C Exam Prep
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Waste Water Treatment 6CExam Prep
What is used for Phosphorus Testing? - -Stannous Chloride
-When sludge is incinerated what is the reduction in volume? - -80%-90%
-Four 8" pipes carry the same volume as? - -One 16" pipe
-In backwashing of a mixed media filter, there is a bed expansion of how
much? - -10%
-when water temperature increases the settling rate in a clarifier does what?
- -Decreases
-Before being used, a tertiary filter should be what? - -Backwashed
-Coliform bacteria is More or Less resistant to chlorination than pathological
bacteria? - -More
-What are always required for installing couplings? - -Precision Assembling
Device
-When an Air Flotation Unit is turned off, drain valves should be opened
when? - -Only if it will be off for a long time
-Industrial Discharge for pre-treatment must meet specifications within? - -3
Years
-Phenolic wastes are treated with what? - -Chlorine
-A centrifugal pump is running hot, a decrease in flow through the pump will
do what? - -Lower the Temperature
-How often should air masks be inspected? - -Every 6 Months
-What is the order from top to bottom for filtered materials? - -Coal, Sand,
Garnet (CGS)
-Microbial Growth rate does what? - -Increase rapidly in a short period, then
decreases as sludge age increases
, -Wire to Water Efficiency includes which measurements? - -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? - -4 - 9 Weeks
-How do you start up an anaerobic digester? - -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? - -Wall Thickness
-1 mg / liter can be expressed how? - -8.34 lbs / mg
-Which lab test best shows the performance of an aerobic digester? - -The
respiration rate
-Pump drives are overpowered by at least which percent? - -10%
-The term N/40 equals what? - -.025 Normal
-How often should blower end plates be checked? - -Every 2 - 4 Years
-Plant Staffing should be updated how often? - -Every 2 Years
-What does carbon monoxide or soot in incinerator stack mean? - -
Inadequate Oxygen
-What solids concentration is necessary for the complete cake release of a
filter press? - -35% - 45%
-The proper alignments between two shafts is done by? - -A straight edge
and a feeler gauge
-When packing a centrifugal pump how should the packing gland be
tightened? - -Slowly over several hours
-What is the range of BOD for liquor recycle from a Wet Air Oxidation Unit? -
-3000 mg/liter
-What is the return capacity of a 10 MGD plant? - -10 MGD
-How do you increase grease removal from a primary clarifier? - -Pre-
Aeration
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