WATER TREATMENT CHAPTER 3 Flashcards
LOCAL CONDITIONS HAVE LITTLE INFLUENCE ON METHODS OF MAN-AGING LAKES AND RES. USED FOR DOMESTIC WATER SUPPLIES
FALSE
THE AMOUNT AND TYPE OF PUBLIC USE ALLOWED ON RES. HAS BEEN STANDARDIZED BY LAWS AND REGS.
FALSE
FEW OF THE CONDITIONS ADVERSELY AFFECT WATER QUALITY IN DOMESTIC WATER SUPPLY RES. RESULT FROM THE IMPACTS OF MAN’S ACTIVITIES UPON THE ENVIRONMENT
FALSE
OBJECTIONAL TASTES AND ODORS IN DOMESTIC WATER SUPPLIES ARE OFTEN RELATED TO THE OCCURRENCE OF ALGAL BLOOMS
TRUE
MANY CONVENTIONAL WATER TREATMENT PLANTS ARE CAPABLE OF REDUCING TASTES AND ODORS TO ACCEPTABLE LEVELS WHEN OPERATED PROPERLY
TRUE
ALGAE CAN DIE OF OXYGEN STARVATION
TRUE
IN A MONOMICTIC LAKE DURING WINTER MONTHS THE LAKE TEMP. IS UNIFORM FROM TOP TO BOTTOM
TRUE
MIXING OCCURS BETWEEN THE EPILIMNION AND HYPOLIMNION ZONES IN THERMALLY STRATIFIED LAKES
FALSE
FISH KILLS CAN RESULT FROM ALGAE CLOGGING THE GILLS OF FISH
TRUE
ONCE VEGETATION REMOVAL IS ACCOMPLISHED AT A RES. SITE REGROWTH SHOULD BE CONTROLLED UNTIL THE RES. IS FILLED
TRUE
CHLORINATION OF A WATER SUPPLY MAY EITHER INCREASE OR DECREASE TASTES AND ODORS
TRUE
THE BEST TOOL WHICH CAN BE USED FOR MANAGING WATER SHEDS IN MOST CASES IS THE REGULATORY PROCESS
TRUE
PHOSPHATE BASE FERTILIZERS USUALLY DO NOT CAUSE THE WATER QUALITY PROBLEMS CAUSED BY NITROGEN FERTILIZERS BECAUSE OF THE SOIL BINDING CHARACTERISTICS OF PHOSPHATE COMPOUNDS
TRUE
ALL ALGAE REACT THE SAME WAY TO COPPER SULFATE
FALSE
DESTRATIFICATION ALWAYS INCREASES THE NUMBER OF ALGAL BLOOMS IN RES.
FALSE
WITH COMPLETE DESTRATIFICATION TEMPS IN A RES. WILL BE NEARLY UNIFORM FROM TOP TO BOTTOM
TRUE
THROUGH PROPER DESIGN AND OPERATION RE DESTRATIFICATION SYSTEMS CAN BE USED TO MANIPULATE TEMPS AND DISSOLVED OXYGEN CONTENT TO DESIRED LEVELS
TRUE
THE OPERATOR OF A SMALL WATER SUPPLY SYSTEM MUST BE ABLE TO MANAGE THE WATER SHED AS WELL AS OPERATORS OF LARGE SYSTEMS
TRUE
RECORDS ARE VERY VALUABLE ONLY WHEN THEY ARE COMPLETED AND FILED BY LAB PERSONNEL
FALSE
THE INLET TO A SINGLE LEVEL INTAKE IS USUALLY LOCATED NEAR THE WATER SURFACE
FALSE
NUTRIENTS ACT AS A ________ IN A LAKE
FERTILIZER
RES. WHICH ARE RICH IN NUTRIENTS AND VERY PRODUCTIVE IN TERMS OF AQUATIC ANIMAL AND PLANT LIFE ARE COMMONLY REFERRED TO AS
EUTROPHIC
WHAT PROBLEMS MAY BE CREATED FOR OPERATORS BY ALGAL BLOOMS IN DOMESTIC WATER SUPPLY RES.
ALL
WHAT WATER QUALITY PROBLEMS ARE CAUSED BY IRON AND MANGANESE IN DRINKING WATER
-DIRTY WATER
-STAINING CLOTHES
-STAINING PORCELAIN FIXTURES
PROPER MANAGEMENT CAN INCREASE RECREATIONAL VALUES OF A RES BE
-CONTROLLING MANS ACTIVITIES ON THE WATERSHED
-REDUCING LARGE MATS OF ALGAE
-REDUCING SCUMS OF ALGAE
-REMOVING VEGATATION BEFORE FLOODING
TREES AND BRUSH SHOULD BE REMOVED FROM AREAS TO BE FLOODED BY RES. TO REDUCE THE _______ LOADING
-NUTRIENT
-ORGANIC
ANAEROBIC CONDITIONS IN THE HYPOLIMNION OF A RES. CAN CAUSE
-FISH KILLS
-ROTTEN EGG ODORS
-IRON AND MANGANESE PROBLEMS
ALGAL BLOOMS IN LAKES AND RES. CAN BE CONTROLLED BE
-CHEMICAL METHODS
-LIMITING NUTRIENT RECYCLING
-PREVENTING NUTRIENT INFLOW
WHICH OF THE FOLLOWING WATER QUALITY INDICATORS HAVE A SIGNIFICANT IMPACT ON THE EFFICIENCY OF COPPER SULFATE AS AN ALGICIDE
-ALKALINITY
-PH
-SUSPENDED MATTER
-WATER TEMP
WHICH CHEMICAL IS USED TO MAKE COPPER SULFATE EFFECTIVE IN HIGHLY ALKALINE WATERS
CITRIC ACID
THE REASONS FOR USING DESTRIFICATION PROGRAMS IN DOMESTIC WATER SUPPLY RES. INCLUDE IMPROVING
-AESTHETICS
-FISHERIES
-RECREATIONAL VEHICLES
-WATER QUALITY
IMPORTANT WATER QUALITY INDICATORS THAT SHOULD BE CONSIDERED IN A LAKE DESTRIFICATION PROGRAM INCLUDE
-DISSOVLED OXYGEN
-TEMP.
FACTORS AFFECTING WATERSHED MANAGMENT PROGRAMS INCLUDE
-SIZE OF WATERSHED
-TOPOGRAPHY
-VEGETATIVE CONDITION
-WATER QUALITY PROBLEMS
WHICH OF THE FOLLOWING WATERSHED PRACTICES CAN AFFECT WATER QUALITY IN A WATER SUPPLY RES.
ALL
WATER QUALITY LAB ANALYSES WHICH MAY BE BES PERFORMED BY COMMERCIAL LABS INCLUDE
-PESTICIDES
-RADIOACTIVITY
-TEMP.
-TRIHALOMETHANES
INTAKE FACILITIES SHOULD PREVENT ______ FROM ENTERING A WATER SHED SUPPLY SYSTEM
-ALGAL SCUMS
-FISH
WATER QUALITY PROBLEMS CAUSED BY ANAEROBIC WATER ENTERING THE INTAKE INLET INCLUDE HIGH CONCENTRATIONS OF
-HYDROGEN SULFIDE
-IRON
-MANGANESE
TYPES OF INTAKE SCREENS INCLUDE
-SLOTTED PLATES
-VEE WIRE
-WOVEN WIRE
METHODS OF CLEANING INTAKE SCREENS INCLUDE
-BRUSHING WITH BRISTLE BRUSHES
-JETTING WITH HIGH PRESSURE WATER
-REVERSING THE FLOW
FACTORS THAT ADVERSELY AFFECT WATER QUALITY IN LAKES AND RES. INCLUDE
ALL
OBJECTIONAL TASTES AND ODORS IN A DOMESTIC SUPPLY MAY BE CAUSED BY
-ALGAE
-HYDROGEN SULFIDE
-OVERTURNS
TRIHALOMETHANES ARE OFTEN FORMED DURING CHLORINATION BY REACTIONS WITH
NATURAL ORANIC MATERIALS
PURPOSES OF RES. MANAGEMENT PROGRAMS INCLUDE
ALL
WHAT IS THE SURFACE AREA OF A RECTANGULAR SETTLING BASIN 60FT BY 15FT
900 SQUARE FEET
WHAT IS THE SURFACE AREA OF A CIRCULAR CLARIFIER 4O FT IN DIAMETER
1256 SQUARE FEET
CALCULATE THE VOLUME IN CUBIC FEET OF A RECTANGULAR SETTLING BASIN 8FTX15FTX60FT
7200 CUBIC FEET
CALCULATE THE VOLUME OF A CIRCULAR CLARIFIER 7FT DEEP BY 40FT IN DIAMETER
8800 CUBIC FEET
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
335 POUNDS
