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5th 6 Months > WATER TREATMENT CHAPTER 3 > Flashcards

WATER TREATMENT CHAPTER 3 Flashcards

1
Q

LOCAL CONDITIONS HAVE LITTLE INFLUENCE ON METHODS OF MAN-AGING LAKES AND RES. USED FOR DOMESTIC WATER SUPPLIES

A

FALSE

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2
Q

THE AMOUNT AND TYPE OF PUBLIC USE ALLOWED ON RES. HAS BEEN STANDARDIZED BY LAWS AND REGS.

A

FALSE

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3
Q

FEW OF THE CONDITIONS ADVERSELY AFFECT WATER QUALITY IN DOMESTIC WATER SUPPLY RES. RESULT FROM THE IMPACTS OF MAN’S ACTIVITIES UPON THE ENVIRONMENT

A

FALSE

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4
Q

OBJECTIONAL TASTES AND ODORS IN DOMESTIC WATER SUPPLIES ARE OFTEN RELATED TO THE OCCURRENCE OF ALGAL BLOOMS

A

TRUE

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5
Q

MANY CONVENTIONAL WATER TREATMENT PLANTS ARE CAPABLE OF REDUCING TASTES AND ODORS TO ACCEPTABLE LEVELS WHEN OPERATED PROPERLY

A

TRUE

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6
Q

ALGAE CAN DIE OF OXYGEN STARVATION

A

TRUE

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7
Q

IN A MONOMICTIC LAKE DURING WINTER MONTHS THE LAKE TEMP. IS UNIFORM FROM TOP TO BOTTOM

A

TRUE

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8
Q

MIXING OCCURS BETWEEN THE EPILIMNION AND HYPOLIMNION ZONES IN THERMALLY STRATIFIED LAKES

A

FALSE

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9
Q

FISH KILLS CAN RESULT FROM ALGAE CLOGGING THE GILLS OF FISH

A

TRUE

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10
Q

ONCE VEGETATION REMOVAL IS ACCOMPLISHED AT A RES. SITE REGROWTH SHOULD BE CONTROLLED UNTIL THE RES. IS FILLED

A

TRUE

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11
Q

CHLORINATION OF A WATER SUPPLY MAY EITHER INCREASE OR DECREASE TASTES AND ODORS

A

TRUE

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12
Q

THE BEST TOOL WHICH CAN BE USED FOR MANAGING WATER SHEDS IN MOST CASES IS THE REGULATORY PROCESS

A

TRUE

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13
Q

PHOSPHATE BASE FERTILIZERS USUALLY DO NOT CAUSE THE WATER QUALITY PROBLEMS CAUSED BY NITROGEN FERTILIZERS BECAUSE OF THE SOIL BINDING CHARACTERISTICS OF PHOSPHATE COMPOUNDS

A

TRUE

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14
Q

ALL ALGAE REACT THE SAME WAY TO COPPER SULFATE

A

FALSE

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15
Q

DESTRATIFICATION ALWAYS INCREASES THE NUMBER OF ALGAL BLOOMS IN RES.

A

FALSE

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16
Q

WITH COMPLETE DESTRATIFICATION TEMPS IN A RES. WILL BE NEARLY UNIFORM FROM TOP TO BOTTOM

A

TRUE

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17
Q

THROUGH PROPER DESIGN AND OPERATION RE DESTRATIFICATION SYSTEMS CAN BE USED TO MANIPULATE TEMPS AND DISSOLVED OXYGEN CONTENT TO DESIRED LEVELS

A

TRUE

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18
Q

THE OPERATOR OF A SMALL WATER SUPPLY SYSTEM MUST BE ABLE TO MANAGE THE WATER SHED AS WELL AS OPERATORS OF LARGE SYSTEMS

A

TRUE

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19
Q

RECORDS ARE VERY VALUABLE ONLY WHEN THEY ARE COMPLETED AND FILED BY LAB PERSONNEL

A

FALSE

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20
Q

THE INLET TO A SINGLE LEVEL INTAKE IS USUALLY LOCATED NEAR THE WATER SURFACE

A

FALSE

21
Q

NUTRIENTS ACT AS A ________ IN A LAKE

A

FERTILIZER

22
Q

RES. WHICH ARE RICH IN NUTRIENTS AND VERY PRODUCTIVE IN TERMS OF AQUATIC ANIMAL AND PLANT LIFE ARE COMMONLY REFERRED TO AS

A

EUTROPHIC

23
Q

WHAT PROBLEMS MAY BE CREATED FOR OPERATORS BY ALGAL BLOOMS IN DOMESTIC WATER SUPPLY RES.

A

ALL

24
Q

WHAT WATER QUALITY PROBLEMS ARE CAUSED BY IRON AND MANGANESE IN DRINKING WATER

A

-DIRTY WATER
-STAINING CLOTHES
-STAINING PORCELAIN FIXTURES

25
Q

PROPER MANAGEMENT CAN INCREASE RECREATIONAL VALUES OF A RES BE

A

-CONTROLLING MANS ACTIVITIES ON THE WATERSHED
-REDUCING LARGE MATS OF ALGAE
-REDUCING SCUMS OF ALGAE
-REMOVING VEGATATION BEFORE FLOODING

26
Q

TREES AND BRUSH SHOULD BE REMOVED FROM AREAS TO BE FLOODED BY RES. TO REDUCE THE _______ LOADING

A

-NUTRIENT
-ORGANIC

27
Q

ANAEROBIC CONDITIONS IN THE HYPOLIMNION OF A RES. CAN CAUSE

A

-FISH KILLS
-ROTTEN EGG ODORS
-IRON AND MANGANESE PROBLEMS

28
Q

ALGAL BLOOMS IN LAKES AND RES. CAN BE CONTROLLED BE

A

-CHEMICAL METHODS
-LIMITING NUTRIENT RECYCLING
-PREVENTING NUTRIENT INFLOW

29
Q

WHICH OF THE FOLLOWING WATER QUALITY INDICATORS HAVE A SIGNIFICANT IMPACT ON THE EFFICIENCY OF COPPER SULFATE AS AN ALGICIDE

A

-ALKALINITY
-PH
-SUSPENDED MATTER
-WATER TEMP

30
Q

WHICH CHEMICAL IS USED TO MAKE COPPER SULFATE EFFECTIVE IN HIGHLY ALKALINE WATERS

A

CITRIC ACID

31
Q

THE REASONS FOR USING DESTRIFICATION PROGRAMS IN DOMESTIC WATER SUPPLY RES. INCLUDE IMPROVING

A

-AESTHETICS
-FISHERIES
-RECREATIONAL VEHICLES
-WATER QUALITY

32
Q

IMPORTANT WATER QUALITY INDICATORS THAT SHOULD BE CONSIDERED IN A LAKE DESTRIFICATION PROGRAM INCLUDE

A

-DISSOVLED OXYGEN
-TEMP.

33
Q

FACTORS AFFECTING WATERSHED MANAGMENT PROGRAMS INCLUDE

A

-SIZE OF WATERSHED
-TOPOGRAPHY
-VEGETATIVE CONDITION
-WATER QUALITY PROBLEMS

34
Q

WHICH OF THE FOLLOWING WATERSHED PRACTICES CAN AFFECT WATER QUALITY IN A WATER SUPPLY RES.

A

ALL

35
Q

WATER QUALITY LAB ANALYSES WHICH MAY BE BES PERFORMED BY COMMERCIAL LABS INCLUDE

A

-PESTICIDES
-RADIOACTIVITY
-TEMP.
-TRIHALOMETHANES

36
Q

INTAKE FACILITIES SHOULD PREVENT ______ FROM ENTERING A WATER SHED SUPPLY SYSTEM

A

-ALGAL SCUMS
-FISH

37
Q

WATER QUALITY PROBLEMS CAUSED BY ANAEROBIC WATER ENTERING THE INTAKE INLET INCLUDE HIGH CONCENTRATIONS OF

A

-HYDROGEN SULFIDE
-IRON
-MANGANESE

38
Q

TYPES OF INTAKE SCREENS INCLUDE

A

-SLOTTED PLATES
-VEE WIRE
-WOVEN WIRE

39
Q

METHODS OF CLEANING INTAKE SCREENS INCLUDE

A

-BRUSHING WITH BRISTLE BRUSHES
-JETTING WITH HIGH PRESSURE WATER
-REVERSING THE FLOW

40
Q

FACTORS THAT ADVERSELY AFFECT WATER QUALITY IN LAKES AND RES. INCLUDE

A

ALL

41
Q

OBJECTIONAL TASTES AND ODORS IN A DOMESTIC SUPPLY MAY BE CAUSED BY

A

-ALGAE
-HYDROGEN SULFIDE
-OVERTURNS

42
Q

TRIHALOMETHANES ARE OFTEN FORMED DURING CHLORINATION BY REACTIONS WITH

A

NATURAL ORANIC MATERIALS

43
Q

PURPOSES OF RES. MANAGEMENT PROGRAMS INCLUDE

A

ALL

44
Q

WHAT IS THE SURFACE AREA OF A RECTANGULAR SETTLING BASIN 60FT BY 15FT

A

900 SQUARE FEET

45
Q

WHAT IS THE SURFACE AREA OF A CIRCULAR CLARIFIER 4O FT IN DIAMETER

A

1256 SQUARE FEET

46
Q

CALCULATE THE VOLUME IN CUBIC FEET OF A RECTANGULAR SETTLING BASIN 8FTX15FTX60FT

A

7200 CUBIC FEET

47
Q

CALCULATE THE VOLUME OF A CIRCULAR CLARIFIER 7FT DEEP BY 40FT IN DIAMETER

A

8800 CUBIC FEET

48
Q

HOW MANY POUNDS OF COPPER SULFATE WILL BE NEEDED TO DOSE A RES. WITH .5 mg/L COPPER?
THE RES. VOLUME IS 20 MILLION GAL. THE COPPER SULFATE IS 25% COPPER

A

335 POUNDS

5th 6 Months (13 decks)

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