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T2 Practice Questions > T2 Prac 4 > Flashcards

T2 Prac 4 Flashcards

(85 cards)

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1
Q

What is an example of a non-community, transient water system?

A

Rest stop

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2
Q

What might occur after a filter has been backwashed?

A

Turbidity momentarily increases in the filter effluent

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3
Q

What is the lowest reportable concentration for constituents called?

A

Detection level for reporting

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4
Q

What are part of the Multiple Tube Fermentation analysis?

A

Presumptive, Confirmed, Completed

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5
Q

What is a log 4 removal?

A

99.99%

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6
Q

What is considered to be a base?

A

pH range of 8 to 14

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7
Q

Which organisms use organic matter for energy and growth?

A

Heterotrophic

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8
Q

What organism is capable of causing diseases?

A

Pathogen

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9
Q

What is the term used to describe the removal or destruction of all microorganisms?

A

Sterilization

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10
Q

Which process releases water vapor into the atmosphere by living plants?

A

Transpiration

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11
Q

What is the zone of saturation?

A

The soil located below the top of the groundwater table

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12
Q

What is an example of combined chlorine?

A

Monochloramine

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13
Q

Which is a chlorine spill kit for a one-ton container?

A

Spill kit B

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14
Q

What is the purpose of pre-chlorination?

A

To control taste

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15
Q

What should be used to convey chlorine gas out of a one-ton container?

A

Upper valve

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16
Q

What is typically the cause of taste and odor problems in raw surface water?

A

Algae growth

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17
Q

What is the best pH for coagulation?

A

5-7

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18
Q

What are the 4 zones of a clarifier?

A

Inlet, outlet, settling, sludge

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19
Q

What is used to protect the underdrain in a filtration system?

A

Gravel

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20
Q

What is not a cause of a short filter run?

A

Low flow

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21
Q

What would not trigger a backwash in a filtration system?

A

Temperature

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22
Q

What is a breakthrough?

A

A crack in the filter bed that allows flocs to pass through

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23
Q

Where should sodium hypochlorite be stored?

A

Away from anything that will corrode

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24
Q

What is the Langlier’s Saturation Index?

A

An indicator of the corrosivity of water

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25
What is the most resistant to a chemical disinfection?
Giardia cyst
26
What DBP would you expect to see in the water that is disinfected with ozonation?
Bromate
27
How long does it take to detect E. Coli using the Colilert method?
24 hours
28
Which chemical is used to remove turbidity?
Alum
29
What is the main purpose of the Surface Water Treatment Rule?
Removal of pathogens
30
Which layer of a stratified reservoir will most likely suffer from algae growth?
Epilmnion
31
What are very small particles that do not dissolve?
Colloids
32
What is a typical source of lead and copper in drinking water?
Corrosion of service pipe
33
What is an accurate lab equipment measuring device?
Pipet
34
What is the definition of operating ratio?
Ratio of annual operating expenses to operating revenue
35
What are the monthly sampling requirements based on?
Population served
36
Which constituent causes hard water?
Magnesium
37
When does chlorine and water reach breakpoint chlorination?
When it stops reacting with organics and inorganics
38
What is the problem with soft water?
Corrosion
39
What's considered soft water?
Less than 60 mg/l CaCO³
40
What would not be used to treat hard water?
Carbon dioxide
41
What's another name for caustic soda?
Sodium hydroxide
42
If a significant amount of iron is present in water, what are the adverse impacts?
Taste and staining
43
What is the health impact of drinking water with excess lead?
Development problems in children
44
What is the impact of TDS on water?
Bad taste
45
Which of the technologies is the most effective way to remove TDS?
Reverse Osmosis
46
What is an organic precursor?
Humic acid
47
What is the impact of overdosing potassium permanganate in water?
Pink water
48
Where are samples for lead and copper typically obtained?
Consumer's tap
49
What is the most common way to test for E. Coli?
Colilert
50
What is the best way to minimize THMs?
Don't prechlorinate
51
When must the public be notified of a Tier 1 violation regarding their water supply?
Within 24 hours after the occurrence of violation
52
What is titration?
A process of adding the chemical reagent in small increments until completion of reaction
53
What is supernatant?
The relatively clear water layer between the sludge on the bottom and the scum on the surface of a basin
54
Which would contribute to alkalinity? Calcium, bicarbonate, sodium or potassium
Bicarbonate
55
What's regulated under the Secondary Drinking Water Standards?
Odor
56
What's a requirement for viruses under the Surface Water Treatment Rule?
99.99% removal and/or inactivation
57
What is the process that transfers water vapor from living plants into the atmosphere?
Evapotranspiration
58
When must a repeat sample be taken?
Sample tests positive for total coliform
59
Why is fluoride injected into drinking water?
Reduce tooth decay
60
What would be used to test chlorine residual in the field?
DPD
61
What is the largest zone in a sedimentation tank?
Settling zone
62
What would describe the attributes of chlorine dioxide?
It does not form carcinogenic compunds
63
What is the common source of coliform?
Feces
64
What is the hypogeal biological layer formed on the surface of a slow sand filter?
Schmutzdecke
65
What would lead to thermal stratification?
When surface water begin to warm
66
What's true about using an inclined plate settler?
Uses a smaller footprint at the plant than a conventional clarifier
67
What would most likely lead to nitrification?
High concentration of ammonia in water
68
What is the probable cause of reddish brown water?
Iron
69
What constituent makes water turn black?
Manganese
70
What is a potentially dangerous condition in a confined space?
Oxygen content drops below 19.5% by volume
71
What's not true about tuberculation?
Increases pipe capacity
72
What is the secondary MCL?
Sets limits for constituents that affect the aesthetic qualities of drinking water
73
What is a tier 1 violation?
Exceeding MCL for nitrate
74
What is used to control the injection of gas chlorine into water?
Chlorinator
75
What is a venturi-style injector used for chlorine gas?
Eductor
76
What would happen if a valve is closed too quickly?
Water hammer
77
When must a public notice be issued to the customer?
When there is a serious problem with the drinking water
78
What would cause manganese to precipitate?
Adding sodium hypochlorite
79
What is the purpose of Total Coliform Rule?
Improve public health protection by reducing fecal pathogens to minimal levels
80
What type of pump is used as a chemical metering pump?
Positive displacement pump
81
If you have rights to pull water out of an adjacent river due to the purchase of land, which rights do you have?
Riparian
82
What's a typical characteristic of surface water?
Higher turbidity and organics
83
If groundwater near an ocean has high concentration pf chloride, what may be true?
Seawater intrusion is occuring
84
What is the thermocline?
Metalimnion
85
What is the purpose of a sanitary seal in a well?
Prevent contamination of groundwater supply

T2 Practice Questions (4 decks)

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