Devices to measure open channel flows are:
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Parshall flume, weir
Which of the following sludge volume index concentrations indicates sludge bulking?
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250 ml/g
You have noticed the following when a centrifugal pump is operating: vibration, heat,
excessive noise and no flow. What could be causing these conditions?
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The pump is cavitating
Raw sewage is fed to a(n)__________________ digester.
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Anaerobic
A check valve's primary purpose is to:
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Allow flow in one direction only
What is the percentage of BOD removal achieved in primary clarifiers
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30 - 40
If a centrifugal pump is displaying an increase in energy consumption, it could be an
indication of one of the following conditions:
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, The pump is running in the incorrect rotation
Exhaust from a chlorinator room should be taken from ________________.
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At floor level
A horizontal centrifugal pump has "rope" packing. When the pump is operating, water
slowly drips from the packing gland. This indicates that:
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Packing bolts or nuts on the packing gland are properly adjusted
When a high organic waste load reaches an activated sludge plant, the operator's first
indication is a decrease in:
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DO decrease in the aeration tank
In the two stage anaerobic digestion process, which of the following statements
apply?
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Digester gas may be used as fuel in the boilers to warm the digestion
process
What effect will excessive amounts of nitrogen and/or phosphorous have upon a
receiving stream, if these compounds are discharged in a poorly treated effluent?
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Cause excessive vegetative growth
The activated sludge process is an _____________________ process.
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Aerobic
Recommended hygiene practices to minimize the risk if being infected by wastewater
pathogens include:
a. only rubbing your eyes while working if you are wearing impervious gloves
b. washing your hands before the beginning of your shift
c. changing out your work clothes and showering before leaving work
d. reading the material safety data sheets for all chemicals used in the plant
Give this one a try later!
Give this one a try later!
Parshall flume, weir
Which of the following sludge volume index concentrations indicates sludge bulking?
Give this one a try later!
250 ml/g
You have noticed the following when a centrifugal pump is operating: vibration, heat,
excessive noise and no flow. What could be causing these conditions?
,Give this one a try later!
The pump is cavitating
Raw sewage is fed to a(n)__________________ digester.
Give this one a try later!
Anaerobic
A check valve's primary purpose is to:
Give this one a try later!
Allow flow in one direction only
What is the percentage of BOD removal achieved in primary clarifiers
Give this one a try later!
30 - 40
If a centrifugal pump is displaying an increase in energy consumption, it could be an
indication of one of the following conditions:
Give this one a try later!
, The pump is running in the incorrect rotation
Exhaust from a chlorinator room should be taken from ________________.
Give this one a try later!
At floor level
A horizontal centrifugal pump has "rope" packing. When the pump is operating, water
slowly drips from the packing gland. This indicates that:
Give this one a try later!
Packing bolts or nuts on the packing gland are properly adjusted
When a high organic waste load reaches an activated sludge plant, the operator's first
indication is a decrease in:
Give this one a try later!
DO decrease in the aeration tank
In the two stage anaerobic digestion process, which of the following statements
apply?
, Give this one a try later!
Digester gas may be used as fuel in the boilers to warm the digestion
process
What effect will excessive amounts of nitrogen and/or phosphorous have upon a
receiving stream, if these compounds are discharged in a poorly treated effluent?
Give this one a try later!
Cause excessive vegetative growth
The activated sludge process is an _____________________ process.
Give this one a try later!
Aerobic
Recommended hygiene practices to minimize the risk if being infected by wastewater
pathogens include:
a. only rubbing your eyes while working if you are wearing impervious gloves
b. washing your hands before the beginning of your shift
c. changing out your work clothes and showering before leaving work
d. reading the material safety data sheets for all chemicals used in the plant
Give this one a try later!
