11776329
Beschreibung
Quiz von Dean Lampman, aktualisiert more than 1 year ago
|
Erstellt von Dean Lampman
vor etwa 7 Jahre
|
|
Frage 1
Frage
What Is not run on raw influent wastewater?
Antworten
-
CBOD
-
FECAL Coliform
-
Suspended Solids
-
pH
Frage 2
Frage
What disease is not considered to be conveyed or transmitted by untreated wastewater?
Antworten
-
Amoebic Dysentery
-
Hepatitis
-
Malaria
-
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
-
Neutralize
-
Lower
-
Increase
-
Have no effect
Frage 4
Frage
Coliform bacteria are
Antworten
-
Algae
-
Coagulant aids
-
Indicators
-
Sequestering agents
Frage 5
Frage
Which of these pH readings indicates an acidic wastewater?
Antworten
-
3
-
7
-
9
-
12
Frage 6
Frage
Three waterborne diseases are
Antworten
-
Mumps, measles, colds
-
Scarlet fever, pneumonia, hay fever
-
Typhoid fever, dysentery, cholera
-
TB, diptheria, chickenpox
Frage 7
Frage
Which one of the following conditions increase chlorine demand?
Antworten
-
Alkalinity
-
Increase in organic matter
-
Increase in phosphate
-
pH increase
Frage 8
Frage
A chlorine leak can be detected by
Antworten
-
An explosimeter
-
Checking the leak guage
-
Spraying water on suspected leaks
-
A white cloud in presence of ammonia fumes
Frage 9
Frage
Turbidity in wastewater is caused by
Antworten
-
Finely divided suspended material
-
Dissolved calcium
-
Hardness
-
Color
Frage 10
Frage
Dark tan and shiny foam is produced when
Antworten
-
F/M ratio is too low
-
Insufficient aeration tank capacity
-
Young Sludge
-
RAS rate inappropriate
Frage 11
Frage
The pH of wastewater
Antworten
-
Always increases as acid concentrations increase
-
Always increases when wastewater becomes septic
-
is measured on a scale of 0 to 14
-
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
-
Concrete and metal corrosion
-
Oxygen deficiency in manholes, sewers, and wet-wells
-
Toxic gas production
-
All of the answers
Frage 13
Frage
Sand, silt, and grit are composed of what kind of matter?
Antworten
-
Colloidal
-
Inorganic
-
Organic
-
Volatile
Frage 14
Frage
Which of the following statements is NOT indicative of fresh wastewater?
Antworten
-
Contains some dissolved oxygen from the water supply
-
is being decomposed by facultative bacteria
-
is blackish in color, with rotten egg odor
-
is turbid with solids in suspension
Frage 15
Frage
How much does a gallon of water weigh?
Antworten
-
9.34 lbs
-
8.34 oz
-
7.5 lbs
-
8.34 lbs
Frage 16
Frage
Organic solids in wastewater are
Antworten
-
Generally of vegetable and animal origin
-
Inert and not subject to decay
-
Mostly floatable solids
-
Always settleable solids
Frage 17
Frage
The purpose of primary sedimentation is to remove
Antworten
-
Pathogenic bacteria
-
Roots, rags, cans, and large debris
-
Sand and gravel
-
Settable and floatable material
Frage 18
Frage
One cubic foot of water contains how many gallons?
Antworten
-
2.31 gallons
-
7.48 gallons
-
8.34 gallons
-
10 gallons
Frage 19
Frage
The seepage of groundwater into sewer lines through cracks and open joints is called
Antworten
-
Inflow
-
Infiltration
-
A blessing in disguise
-
Sanitary sewage
Frage 20
Frage
The direct flow of rainwater into a sewer line through ground level openings and breaks is
Antworten
-
Inflow
-
Infiltration
-
Industrial sewage
-
Sanitary sewage
Frage 21
Frage
_______________ is the most common and prevalent odorous gas associated with domestic wastewater collection systems.
Antworten
-
Chlorine
-
Hydrogen sulfide
-
Carbon dioxide
-
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
-
Increase in food (BOD) in the aeration tank influent
-
Decrease in organic wastewater
-
Increase in influent DO
-
Increase in toxic substances
Frage 23
Frage
Chlorine is _____ times heavier than air
Antworten
-
1.5
-
2.0
-
2.5
-
3.0
Frage 24
Frage
The liquid to gas expansion ration of chlorine is
Antworten
-
25 to 1
-
250 to 1
-
460 to 1
-
500 to 1
Frage 25
Frage
Gaseous chlorine is a
Antworten
-
Clear colorless gas
-
White fog-like gas
-
Greenish-yellow gas
-
Greyish-white gas
Frage 26
Frage
In an aerator, a white billowing foam indicates
Antworten
-
The need to increase wasting
-
The need to increase the return activated sludge rate
-
The need to decrease wasting
-
The need to stop the return activated sludge
Frage 27
Frage
In the aerator, the dissolved oxygen should be maintained at what level?
Antworten
-
2.0 mg/L
-
5.0 mg/L
-
6.0 mg/L
-
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
-
A bulking sludge
-
A young sludge
-
An old sludge
-
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
-
1
-
2
-
5
-
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
-
15
-
30
-
45
-
60
Frage 31
Frage
The operator must report the FDEP any serious breakdown or malfunction within what time frame?
Antworten
-
24 hours
-
48 hours
-
12 hours
-
Immediately
Frage 32
Frage
The recommended storage temperature for preserving samples is
Antworten
-
21° C
-
4° C
-
60° F
-
32° F
Frage 33
Frage
Employee hazards you might encounter around a treatment facility would be
Antworten
-
Noxious or toxic gases
-
Physical injuries
-
Oxygen deficiency
-
All of the answers
Frage 34
Frage
Chlorine gas is
Antworten
-
Colorless
-
Heavier than air
-
Nontoxic
-
Odorless
Frage 35
Frage
Chlorine is primarily used to
Antworten
-
Disinfect
-
Prevent corrosion
-
Raise pH
-
Stabilize organics
Frage 36
Frage
The exhaust fan inlet in a chlorinator room and/or chlorine storage room should be taken from
Antworten
-
Anywhere - the location is not important
-
At floor level
-
Close to the entrance
-
In the ceiling
Möchten Sie mit GoConqr kostenlos Ihre eigenen Quiz erstellen? eigenen Mehr erfahren.