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T2 Practice Questions > T2 Prac 4 > Flashcards

T2 Prac 4 Flashcards

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
Q

What is the most resistant to a chemical disinfection?

A

Giardia cyst

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26
Q

What DBP would you expect to see in the water that is disinfected with ozonation?

A

Bromate

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27
Q

How long does it take to detect E. Coli using the Colilert method?

A

24 hours

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28
Q

Which chemical is used to remove turbidity?

A

Alum

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29
Q

What is the main purpose of the Surface Water Treatment Rule?

A

Removal of pathogens

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30
Q

Which layer of a stratified reservoir will most likely suffer from algae growth?

A

Epilmnion

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31
Q

What are very small particles that do not dissolve?

A

Colloids

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32
Q

What is a typical source of lead and copper in drinking water?

A

Corrosion of service pipe

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33
Q

What is an accurate lab equipment measuring device?

A

Pipet

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34
Q

What is the definition of operating ratio?

A

Ratio of annual operating expenses to operating revenue

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35
Q

What are the monthly sampling requirements based on?

A

Population served

36
Q

Which constituent causes hard water?

A

Magnesium

37
Q

When does chlorine and water reach breakpoint chlorination?

A

When it stops reacting with organics and inorganics

38
Q

What is the problem with soft water?

A

Corrosion

39
Q

What’s considered soft water?

A

Less than 60 mg/l CaCO³

40
Q

What would not be used to treat hard water?

A

Carbon dioxide

41
Q

What’s another name for caustic soda?

A

Sodium hydroxide

42
Q

If a significant amount of iron is present in water, what are the adverse impacts?

A

Taste and staining

43
Q

What is the health impact of drinking water with excess lead?

A

Development problems in children

44
Q

What is the impact of TDS on water?

A

Bad taste

45
Q

Which of the technologies is the most effective way to remove TDS?

A

Reverse Osmosis

46
Q

What is an organic precursor?

A

Humic acid

47
Q

What is the impact of overdosing potassium permanganate in water?

A

Pink water

48
Q

Where are samples for lead and copper typically obtained?

A

Consumer’s tap

49
Q

What is the most common way to test for E. Coli?

A

Colilert

50
Q

What is the best way to minimize THMs?

A

Don’t prechlorinate

51
Q

When must the public be notified of a Tier 1 violation regarding their water supply?

A

Within 24 hours after the occurrence of violation

52
Q

What is titration?

A

A process of adding the chemical reagent in small increments until completion of reaction

53
Q

What is supernatant?

A

The relatively clear water layer between the sludge on the bottom and the scum on the surface of a basin

54
Q

Which would contribute to alkalinity? Calcium, bicarbonate, sodium or potassium

A

Bicarbonate

55
Q

What’s regulated under the Secondary Drinking Water Standards?

A

Odor

56
Q

What’s a requirement for viruses under the Surface Water Treatment Rule?

A

99.99% removal and/or inactivation

57
Q

What is the process that transfers water vapor from living plants into the atmosphere?

A

Evapotranspiration

58
Q

When must a repeat sample be taken?

A

Sample tests positive for total coliform

59
Q

Why is fluoride injected into drinking water?

A

Reduce tooth decay

60
Q

What would be used to test chlorine residual in the field?

A

DPD

61
Q

What is the largest zone in a sedimentation tank?

A

Settling zone

62
Q

What would describe the attributes of chlorine dioxide?

A

It does not form carcinogenic compunds

63
Q

What is the common source of coliform?

A

Feces

64
Q

What is the hypogeal biological layer formed on the surface of a slow sand filter?

A

Schmutzdecke

65
Q

What would lead to thermal stratification?

A

When surface water begin to warm

66
Q

What’s true about using an inclined plate settler?

A

Uses a smaller footprint at the plant than a conventional clarifier

67
Q

What would most likely lead to nitrification?

A

High concentration of ammonia in water

68
Q

What is the probable cause of reddish brown water?

A

Iron

69
Q

What constituent makes water turn black?

A

Manganese

70
Q

What is a potentially dangerous condition in a confined space?

A

Oxygen content drops below 19.5% by volume

71
Q

What’s not true about tuberculation?

A

Increases pipe capacity

72
Q

What is the secondary MCL?

A

Sets limits for constituents that affect the aesthetic qualities of drinking water

73
Q

What is a tier 1 violation?

A

Exceeding MCL for nitrate

74
Q

What is used to control the injection of gas chlorine into water?

A

Chlorinator

75
Q

What is a venturi-style injector used for chlorine gas?

A

Eductor

76
Q

What would happen if a valve is closed too quickly?

A

Water hammer

77
Q

When must a public notice be issued to the customer?

A

When there is a serious problem with the drinking water

78
Q

What would cause manganese to precipitate?

A

Adding sodium hypochlorite

79
Q

What is the purpose of Total Coliform Rule?

A

Improve public health protection by reducing fecal pathogens to minimal levels

80
Q

What type of pump is used as a chemical metering pump?

A

Positive displacement pump

81
Q

If you have rights to pull water out of an adjacent river due to the purchase of land, which rights do you have?

A

Riparian

82
Q

What’s a typical characteristic of surface water?

A

Higher turbidity and organics

83
Q

If groundwater near an ocean has high concentration pf chloride, what may be true?

A

Seawater intrusion is occuring

84
Q

What is the thermocline?

A

Metalimnion

85
Q

What is the purpose of a sanitary seal in a well?

A

Prevent contamination of groundwater supply

T2 Practice Questions (4 decks)

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