11776329
Descrição
Quiz por Dean Lampman, atualizado more than 1 year ago
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Criado por Dean Lampman
quase 7 anos atrás
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Questão 1
Questão
What Is not run on raw influent wastewater?
Responda
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CBOD
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FECAL Coliform
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Suspended Solids
-
pH
Questão 2
Questão
What disease is not considered to be conveyed or transmitted by untreated wastewater?
Responda
-
Amoebic Dysentery
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Hepatitis
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Malaria
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Cholera
Questão 3
Questão
What effect will the addition of chlorine, acid, alum. carbon dioxide, or sulfuric acid have on the pH of wastewater?
Responda
-
Neutralize
-
Lower
-
Increase
-
Have no effect
Questão 4
Questão
Coliform bacteria are
Responda
-
Algae
-
Coagulant aids
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Indicators
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Sequestering agents
Questão 5
Questão
Which of these pH readings indicates an acidic wastewater?
Responda
-
3
-
7
-
9
-
12
Questão 6
Questão
Three waterborne diseases are
Responda
-
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
Questão 7
Questão
Which one of the following conditions increase chlorine demand?
Responda
-
Alkalinity
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Increase in organic matter
-
Increase in phosphate
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pH increase
Questão 8
Questão
A chlorine leak can be detected by
Responda
-
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
Questão 9
Questão
Turbidity in wastewater is caused by
Responda
-
Finely divided suspended material
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Dissolved calcium
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Hardness
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Color
Questão 10
Questão
Dark tan and shiny foam is produced when
Responda
-
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
Questão 11
Questão
The pH of wastewater
Responda
-
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
Questão 12
Questão
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?
Responda
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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
Questão 13
Questão
Sand, silt, and grit are composed of what kind of matter?
Responda
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Colloidal
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Inorganic
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Organic
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Volatile
Questão 14
Questão
Which of the following statements is NOT indicative of fresh wastewater?
Responda
-
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
Questão 15
Questão
How much does a gallon of water weigh?
Responda
-
9.34 lbs
-
8.34 oz
-
7.5 lbs
-
8.34 lbs
Questão 16
Questão
Organic solids in wastewater are
Responda
-
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
Questão 17
Questão
The purpose of primary sedimentation is to remove
Responda
-
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
Questão 18
Questão
One cubic foot of water contains how many gallons?
Responda
-
2.31 gallons
-
7.48 gallons
-
8.34 gallons
-
10 gallons
Questão 19
Questão
The seepage of groundwater into sewer lines through cracks and open joints is called
Responda
-
Inflow
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Infiltration
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A blessing in disguise
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Sanitary sewage
Questão 20
Questão
The direct flow of rainwater into a sewer line through ground level openings and breaks is
Responda
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Inflow
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Infiltration
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Industrial sewage
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Sanitary sewage
Questão 21
Questão
_______________ is the most common and prevalent odorous gas associated with domestic wastewater collection systems.
Responda
-
Chlorine
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Hydrogen sulfide
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Carbon dioxide
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Methane
Questão 22
Questão
Which of the following factors could cause a demand for more DO (Increase in aeration rate) in an aeration tank?
Responda
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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
Questão 23
Questão
Chlorine is _____ times heavier than air
Responda
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1.5
-
2.0
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2.5
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3.0
Questão 24
Questão
The liquid to gas expansion ration of chlorine is
Responda
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25 to 1
-
250 to 1
-
460 to 1
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500 to 1
Questão 25
Questão
Gaseous chlorine is a
Responda
-
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
Questão 26
Questão
In an aerator, a white billowing foam indicates
Responda
-
The need to increase wasting
-
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
Questão 27
Questão
In the aerator, the dissolved oxygen should be maintained at what level?
Responda
-
2.0 mg/L
-
5.0 mg/L
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6.0 mg/L
-
8.0 mg/L
Questão 28
Questão
A low F/M ratio, high MCRT, low SVI, and high MLSS concentrations are all characteristic of
Responda
-
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
Questão 29
Questão
A Class D operator shall not be the lead/chief operator of more than ______ wastewater treatment plant(s) at any time.
Responda
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1
-
2
-
5
-
10
Questão 30
Questão
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.
Responda
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15
-
30
-
45
-
60
Questão 31
Questão
The operator must report the FDEP any serious breakdown or malfunction within what time frame?
Responda
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24 hours
-
48 hours
-
12 hours
-
Immediately
Questão 32
Questão
The recommended storage temperature for preserving samples is
Responda
-
21° C
-
4° C
-
60° F
-
32° F
Questão 33
Questão
Employee hazards you might encounter around a treatment facility would be
Responda
-
Noxious or toxic gases
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Physical injuries
-
Oxygen deficiency
-
All of the answers
Questão 34
Questão
Chlorine gas is
Responda
-
Colorless
-
Heavier than air
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Nontoxic
-
Odorless
Questão 35
Questão
Chlorine is primarily used to
Responda
-
Disinfect
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Prevent corrosion
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Raise pH
-
Stabilize organics
Questão 36
Questão
The exhaust fan inlet in a chlorinator room and/or chlorine storage room should be taken from
Responda
-
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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