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Chief operators never use past records to adjust treatment processes.
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All water comes in the form of precipitation.
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Many organisms that cause disease in humans originate with the fecal discharges of infected individuals.
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Groundwater is high in dissolved oxygen
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The impact of a contaminant on surface water depends on the receiving water’s ability to assimilate contaminant
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An Oligotrophic lake has low nutrient content.
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reatment plant operators do not need to keep informed of local, state and federal regulations.
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Local conditions have an influence on methods of managing lakes and reservoirs used for domestic water supplies.
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Precipitation is high in bacterial count.
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Color in water is objectionable mainly from the standpoint of health.
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The specific disease-producing organisms present in water are hard to identify
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Temperature has no impact on the effectiveness of copper sulfate
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Excessive Nitrate in drinking water can lead to cancer
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The Interim Enhanced Surface Water Treatment Rule does not address Cryptosporidium.
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Measuring biological oxygen demand can be used to indirectly measure the organic content of the water
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The State’s regulatory program can be less stringent than the US EPA’s program.
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Primary drinking water standards are not mandatory standards.
Frage 19
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Stratification develops when a warm layer of water overlies a colder layer
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Under the Total Coliform Rule the MCL is violated if 5% of the samples collected in a month are total coliform positive.
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Porosity is the volume of space in a given amount of material.
Frage 22
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Drawdown is the water level in a well when the pump is on moving water.
Frage 23
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Suspended matter has little or no effect on copper sulfate treatment.
Frage 24
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There is no minimum requirement for distribution chlorine residual under the SWTR.
Frage 25
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The turbidity requirement under the Interim Enhanced Surface Water Treatment rule is <0.3 NTU
Frage 26
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The ________ is the continuous exchange of water between the earth and the atmosphere.
Antworten
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Hydropneumatic cycle
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Life cycle
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Hydraulic gradient
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Hydrologic cycle
Frage 27
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What is the purpose of a water treatment plant?
Antworten
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To produce safe and pleasant drinking water
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To produce water containing toxic substances
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To produce water transmitting disease-causing organisms
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To produce water with agreeable taste, odor or appearance
Frage 28
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What does the size of a water treatment plant depend upon?
Antworten
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The water supply
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Impurities in the water
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Regulatory Factors
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All of the above
Frage 29
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All of the following factors influence the concentration of copper sulfate needed for effective control of algae blooms except?
Antworten
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Alkalinity
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Water pH
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Septic tanks
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Water temperature
Frage 30
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What is the purpose of the chemical coagulation process?
Antworten
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Cause very fine particles to clump together into larger particles
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Filter out remaining suspended particles
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Kill disease-causing organisms
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Settle out larger suspended particles
Frage 31
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Which constituent is not a chemical contaminant?
Antworten
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Inorganic
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Volatile Organic
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Synthetic Organic
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Bacteria
Frage 32
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A water-bearing geological formation is referred to as a(n)?
Antworten
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Aquifer
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Aquarium
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Water table
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Bed rock
Frage 33
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A 4 log removal rate is equal to what percent?
Frage 34
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Whenever a chemical algae control program is started, when should monitoring be performed?
Antworten
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Before, during and after use of chemicals
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Before visits by regulatory agencies
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When staff are available
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Whenever results are needed for analysis
Frage 35
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Plants give off water vapor to the atmosphere through a process called?
Antworten
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Percolation
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Evaporation
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Transpiration
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All of the Above
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Organic matter combined with chlorine can create?
Frage 37
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Which of the following does not influence surface runoff?
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Surface water runoff such as creeks and rivers collect water from an area of land towards one primary water course and is known as the?
Antworten
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Contributory
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Pooling area
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Watershed
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Canyon
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When using a river or stream as a water supply, what is a major concern?
Antworten
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Downstream usage
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Spawning conditions
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Groundwater quality
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Upstream conditions
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The area outward from the center of a well that is affected during pumping is called the?
Antworten
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Radius of influence
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Zone of saturation
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Water table
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Impervious section
Frage 41
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The Surface Water Treatment Rule requires the ________ and ________ of Giardia
Antworten
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Coagulation and sedimentation
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Removal and inactivation
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Disinfection and flocculation
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Coagulation and disinfection
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A direct filtration water treatment plant does not include?
Antworten
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Coagulation
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Sedimentation
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Filtration
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Flocculation
Frage 43
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What is the major type of problem caused by waste water contamination of a domestic water supply?
Frage 44
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Why must operators constantly monitor raw water quality in a river?
Antworten
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To detect sudden pollutant loads
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To inform the public in Consumer Confidence Reports
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To justify lab workload and budget
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To notify wastewater treatment plant operators
Frage 45
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What are the primary responsibilities of Water Treatment Operators?
Antworten
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Produce pleasant drinking water
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Produce safe drinking water
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Protect health and well-being of the community
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All of the above
Frage 46
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Which is not a trophic state of a lake?
Antworten
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Oligotrophic
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Endotrophic
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Mesotrophic
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Eutrophic
Frage 47
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A disinfected water supply is one in which
Antworten
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All bacteria and viruses have been sterilized
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All algae have been destroyed
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All pathogenic organisms have been inactivated or destroyed
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All of the above
Frage 48
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Which of the following is not considered a point source discharge?
Antworten
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Wastewater discharge
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Mine drainage
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Storm water runoff
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Industrial discharges
Frage 49
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Which of the following is not a characteristic of Surface water?
Antworten
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Variable composition
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High turbidity
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Low dissolved oxygen
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Low iron and manganese
Frage 50
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What are the typical duties of Water treatment Operators?
Antworten
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Operate process equipment
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Calibrate and maintain chemical dosages and applications
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Maintain accurate records of operational data
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All of the above
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Drinking water standards are usually categorized as being related to either _______ or ________.
Frage 52
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Which is not a layer in a stratified lake?
Antworten
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Hydrolimnion
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Mesolimnion
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Hypolimnion
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Epilimnion
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The number of water samples that must be collected each month in a water distribution system is based on?
Antworten
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The size of the population served
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The type of treatment given to the water
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The source of the water
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The size of the water mains
Frage 54
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A system whose number of customers exceeds 25 and are full time residents would be categorized as a?
Frage 55
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As a relate of algae blooms, what happens to organic matter within water supply reservoirs
Antworten
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Constant
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Decrease
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Increase
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Unpredictable
Frage 56
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In determining the purity of a water sample, it is usually tested for the presence of coliform bacteria because ____________.
Antworten
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It can be detected using a microscope
-
It can be done in the field
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It is one of the disease-bearing bacteria
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Its presence may indicate that the water has been contaminated
Frage 57
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What is an example of a non-transient non-community water system?
Antworten
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Campground
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Restaurant
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School
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Service station
Frage 58
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The EPA has imposed drinking water regulations that cover many contaminants including?
Antworten
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General physical and general mineral characteristics
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Organics, inorganic, and volatile organic compounds (VOCs)
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Bacteriological and radiological characteristics
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All of the above
Frage 59
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Water has its greatest density at?
Antworten
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40 degrees F
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29 degrees F
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39 degrees F
-
35 degrees F
Frage 60
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Which is not a bacterium?
Antworten
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Total Coliform
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Giardia
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E. Coli
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Legionella
Frage 61
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How do nutrients cause water quality problems in domestic water supply
Frage 62
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Methemoglobinemia is caused by?
Antworten
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Cancer
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Giardia
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Flouride
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Nitrate
Frage 63
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The "Total Coliform Rule" of the SDWA regulations requires the result of coliform testing to be given as?
Frage 64
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The first time a distribution water sample is returned with a "positive" test result, one should?
Antworten
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Take another sample from the same location and other designated locations
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Notify the public to boil the water
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Take a sample from the source
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Increase the chlorine dosage
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Water shed protection does not include protective measures against?
Antworten
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Boating
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Ice cutting
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Clear cutting
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Landfills
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The algae that causes most of the problems in Southern California's lakes is called?
Antworten
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Blue-Green
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Green
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Diatoms
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Oscillatoria Curviceps
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Which is not a characteristic of an Oligotrophic lake?
Frage 68
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Which activity is the US Environmental Protection Agency (USEPA) not responsible for?
Antworten
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Writing water legislation
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Setting maximum contaminant levels
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Delegating primary enforcement duties to states
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Monitors state activities
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What is a potential cause of objectionable tastes and odor in a domestic water supply
Antworten
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Algae blooms
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Birds
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Coliforms
-
Hardness
Frage 70
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What is the primary purpose of vegetation removal in areas where new reservoirs are to be formed?
Antworten
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To control potential fire hazard during filling
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To create additional storage space
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To eliminate causes of accidents to recreational users
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To reduce the organic and nutrient loading in the reservoir
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A water system must give a Tier 1 public notice for?
Antworten
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A violation of MCL for VOC's and SOC's
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A violation of Total Coliform MCL
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A failure to monitor
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Failing to comply with variance or exemption
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Which outcome is not a result of de-stratification and re-aeration?
Frage 73
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The surface water treatment rule requires which removal rate for giardia?
Frage 74
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The Interim Enhanced Surface Water Treatment Rule requires the maintenance of a minimum distribution chlorine residual of?
Antworten
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0.2 mg/l
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1.0 mg/l
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2.0 mg/l
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4.0 mg/l
Frage 75
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Which item did the 1974 Safe Drinking Water Act not establish?
Antworten
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Primary Drinking water regulations
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Monitoring of chemical and microbiological contaminants
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Enforceable standards
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Standards for chemical analysis
Frage 76
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If algae blooms are a problem the operating agency should develop capabilities for obtaining what types of information?
Frage 77
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The effectiveness of copper sulfate treatment is affected by?
Antworten
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Alkalinity
-
Suspended matter
-
Temperature
-
All of the above
Frage 78
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What problems may be created for operators by algae blooms in domestic water supply reservoirs?
Frage 79
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Additional bacteriological monitoring must be conducted?
Antworten
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After construction of wells
-
After main installation or repair
-
After construction, repair or maintenance of storage facilities
-
All of the above
Frage 80
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Algae blooms in lakes and reservoirs can be controlled by?
Antworten
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Adding nutrients
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Reducing oxygen
-
Chemical methods
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Shortening filter runs
Frage 81
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The area in a lake where there is sufficient light and nutrients to cause aquatic growth is called the?
Antworten
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Littoral zone
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Limnetic zone
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Terrestrial zone
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Benthic zone
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The inactivation of pathogenic organisms is called?
Antworten
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Sterilization
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Oxidation
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Pasteurization
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Disinfection
Frage 83
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A change in the pH in a reservoir between the daytime and the night time is cause by?
Antworten
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Algae consuming CO2 during the day and releasing CO2 at nigh
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Algae releasing CO2 during the day and consuming CO2 at night
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The overfeeding of coffer sulfate
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The decomposition of inorganic material
Frage 84
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Which is not a major contributor of Nitrate contamination in groundwater?
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Alkalinity can be defined as?
Antworten
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A measurement of the basic state of water
-
A measurement of the ability of water to buffer against changes in pH
-
A measurement of the amount of acid in the water
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A measurement of the amount of hydrogen ions in the water
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A treatment plant can be defined as?
Antworten
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Any process or set of processes that effect the physical, chemical or biological characteristics of water
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Only those processes that constitute conventional water treatment
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A place where operators can catch up on their sleep
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Any process or set of processes that effect the biological characteristics of water
Frage 87
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State Drinking Water Regulations can be found in?
Antworten
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40 CFR part 141-149
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Title 17 of the Code of State Regulations
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Title 28 of the California Code of State Regulations
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Title 22 of the California Code of State Regulations
Frage 88
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Turbidity is the measurement of?
Antworten
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The concentration of bacteria in the water
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The color of water measured in CFU
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A measurement of inorganic material in the water
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The amount of particulate material in the water
Frage 89
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Compliance sampling must be reported to state by?
Frage 90
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The zone in a lake that is considered "open water" is the?
Antworten
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Benthic Zone
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Limentic Zone
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Littoral Zone
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Auto Zone
Frage 91
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What is the volume in cubic feet of a circular clarifier 8 feet deep and 40 feet in diameter?
Antworten
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10,048 ft3
-
15,162 ft3
-
17,038 ft3
-
19,625 ft3
-
22,608 ft3
Frage 92
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What is the volume in gallons of a rectangular settling basin 8 feet deep, 12 feet wide, 50 feet long?
Antworten
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47, 672 gallons
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35, 904 gallons
-
43,084 gallons
-
44,808 gallons
-
4,800 gallons
Frage 93
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How many pounds of copper sulfate will be needed to dose a reservoir with 0.6 mg/l copper? The reservoir volume is 20 million gallons. The copper sulfate is 25% copper. Assume the alkalinity of 40 mg/l.
Antworten
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100 lbs.
-
400 lbs.
-
800 lbs.
-
1,200 lbs.
-
1,334 lbs.
Frage 94
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A reservoir has an average length of 1196 ft and an average width of 961 ft, the alkalinity is 175 mg/l. How many pounds of CuSO4 is needed?
Antworten
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6 lbs.
-
18 lbs.
-
20 lbs.
-
50 lbs.
-
143 lbs.