11776329
Beschreibung
Quiz von Dean Lampman, aktualisiert more than 1 year ago
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Erstellt von Dean Lampman
vor fast 7 Jahre
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Frage 1
Frage
What Is not run on raw influent wastewater?
Antworten
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CBOD
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FECAL Coliform
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Suspended Solids
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pH
Frage 2
Frage
What disease is not considered to be conveyed or transmitted by untreated wastewater?
Antworten
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Amoebic Dysentery
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Hepatitis
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Malaria
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Cholera
Frage 3
Frage
What effect will the addition of chlorine, acid, alum. carbon dioxide, or sulfuric acid have on the pH of wastewater?
Antworten
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Neutralize
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Lower
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Increase
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Have no effect
Frage 4
Frage
Coliform bacteria are
Antworten
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Algae
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Coagulant aids
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Indicators
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Sequestering agents
Frage 5
Frage
Which of these pH readings indicates an acidic wastewater?
Antworten
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3
-
7
-
9
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12
Frage 6
Frage
Three waterborne diseases are
Antworten
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Mumps, measles, colds
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Scarlet fever, pneumonia, hay fever
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Typhoid fever, dysentery, cholera
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TB, diptheria, chickenpox
Frage 7
Frage
Which one of the following conditions increase chlorine demand?
Antworten
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Alkalinity
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Increase in organic matter
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Increase in phosphate
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pH increase
Frage 8
Frage
A chlorine leak can be detected by
Antworten
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An explosimeter
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Checking the leak guage
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Spraying water on suspected leaks
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A white cloud in presence of ammonia fumes
Frage 9
Frage
Turbidity in wastewater is caused by
Antworten
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Finely divided suspended material
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Dissolved calcium
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Hardness
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Color
Frage 10
Frage
Dark tan and shiny foam is produced when
Antworten
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F/M ratio is too low
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Insufficient aeration tank capacity
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Young Sludge
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RAS rate inappropriate
Frage 11
Frage
The pH of wastewater
Antworten
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Always increases as acid concentrations increase
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Always increases when wastewater becomes septic
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is measured on a scale of 0 to 14
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is measured on a scale of 0 to 100 mg/L
Frage 12
Frage
Which of the following conditions are likely to have been caused by biological activity that is prompted by long, sluggish flow in a flat grade sewer line?
Antworten
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Concrete and metal corrosion
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Oxygen deficiency in manholes, sewers, and wet-wells
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Toxic gas production
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All of the answers
Frage 13
Frage
Sand, silt, and grit are composed of what kind of matter?
Antworten
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Colloidal
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Inorganic
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Organic
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Volatile
Frage 14
Frage
Which of the following statements is NOT indicative of fresh wastewater?
Antworten
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Contains some dissolved oxygen from the water supply
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is being decomposed by facultative bacteria
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is blackish in color, with rotten egg odor
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is turbid with solids in suspension
Frage 15
Frage
How much does a gallon of water weigh?
Antworten
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9.34 lbs
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8.34 oz
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7.5 lbs
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8.34 lbs
Frage 16
Frage
Organic solids in wastewater are
Antworten
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Generally of vegetable and animal origin
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Inert and not subject to decay
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Mostly floatable solids
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Always settleable solids
Frage 17
Frage
The purpose of primary sedimentation is to remove
Antworten
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Pathogenic bacteria
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Roots, rags, cans, and large debris
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Sand and gravel
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Settable and floatable material
Frage 18
Frage
One cubic foot of water contains how many gallons?
Antworten
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2.31 gallons
-
7.48 gallons
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8.34 gallons
-
10 gallons
Frage 19
Frage
The seepage of groundwater into sewer lines through cracks and open joints is called
Antworten
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Inflow
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Infiltration
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A blessing in disguise
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Sanitary sewage
Frage 20
Frage
The direct flow of rainwater into a sewer line through ground level openings and breaks is
Antworten
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Inflow
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Infiltration
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Industrial sewage
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Sanitary sewage
Frage 21
Frage
_______________ is the most common and prevalent odorous gas associated with domestic wastewater collection systems.
Antworten
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Chlorine
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Hydrogen sulfide
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Carbon dioxide
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Methane
Frage 22
Frage
Which of the following factors could cause a demand for more DO (Increase in aeration rate) in an aeration tank?
Antworten
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Increase in food (BOD) in the aeration tank influent
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Decrease in organic wastewater
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Increase in influent DO
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Increase in toxic substances
Frage 23
Frage
Chlorine is _____ times heavier than air
Antworten
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1.5
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2.0
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2.5
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3.0
Frage 24
Frage
The liquid to gas expansion ration of chlorine is
Antworten
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25 to 1
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250 to 1
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460 to 1
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500 to 1
Frage 25
Frage
Gaseous chlorine is a
Antworten
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Clear colorless gas
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White fog-like gas
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Greenish-yellow gas
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Greyish-white gas
Frage 26
Frage
In an aerator, a white billowing foam indicates
Antworten
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The need to increase wasting
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The need to increase the return activated sludge rate
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The need to decrease wasting
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The need to stop the return activated sludge
Frage 27
Frage
In the aerator, the dissolved oxygen should be maintained at what level?
Antworten
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2.0 mg/L
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5.0 mg/L
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6.0 mg/L
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8.0 mg/L
Frage 28
Frage
A low F/M ratio, high MCRT, low SVI, and high MLSS concentrations are all characteristic of
Antworten
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A bulking sludge
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A young sludge
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An old sludge
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None of the answers
Frage 29
Frage
A Class D operator shall not be the lead/chief operator of more than ______ wastewater treatment plant(s) at any time.
Antworten
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1
-
2
-
5
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10
Frage 30
Frage
Where chlorine is used for basic disinfection, a total chlorine residual of at least 0.5 mg/L shall be maintained after at least _____ minutes contact time at maximum daily flow.
Antworten
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15
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30
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45
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60
Frage 31
Frage
The operator must report the FDEP any serious breakdown or malfunction within what time frame?
Antworten
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24 hours
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48 hours
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12 hours
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Immediately
Frage 32
Frage
The recommended storage temperature for preserving samples is
Antworten
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21° C
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4° C
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60° F
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32° F
Frage 33
Frage
Employee hazards you might encounter around a treatment facility would be
Antworten
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Noxious or toxic gases
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Physical injuries
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Oxygen deficiency
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All of the answers
Frage 34
Frage
Chlorine gas is
Antworten
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Colorless
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Heavier than air
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Nontoxic
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Odorless
Frage 35
Frage
Chlorine is primarily used to
Antworten
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Disinfect
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Prevent corrosion
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Raise pH
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Stabilize organics
Frage 36
Frage
The exhaust fan inlet in a chlorinator room and/or chlorine storage room should be taken from
Antworten
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Anywhere - the location is not important
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At floor level
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Close to the entrance
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In the ceiling
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