Questions and Answers
Which of the following is not an approved inactivation chemical under the SWTR?
Which of the following categories of microorganisms is not specifically addressed in the surface water treatment rule?
Which of the following treatment processes can be used to remove algae-related odors from drinking water?
The most common source of unpleasant odors in surface water supplies is?
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To comply with the surface water treatment rule, what is the minimum level of giardia reduction that must be achieved?
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What is the most commonly applied means for determining if a surface water treatment plant is in compliance with the properly operated requirements of the SWTR?
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Which of the following chemicals can be used to reduce algae growth?
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Under the SWTR how many logs of virus inactivation are required at a properly operated direct filtration plant?
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Particles in which of the following categories would be visible to the unaided eye?
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Filtration is effective at removing particles in which of the following size categories?
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What is the virus removal credit awarded to a properly operated conventional treatment plant?
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To comply with the cryptosporidium requirements of the SWTR, which of the following must be achieved?
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In which of the following particle size categories would we place viruses?
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Which of the following chemicals can be used to remove algae-related odors from drinking water?
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Three logs of inactivation is equivalent to?
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What is the SWTR-required level of reduction of viruses?
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Which of the following microorganisms would be most effectively removed from drinking water by filtration?
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Which of the following processes is NOT approved for pathogen removal in a surface water treatment plant?
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The maximum disinfectant residual allowed in a distribution system is?
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The bubbles formed in a positive multiple tube fermentation analysis are?
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A bacteriological test that measures only the presence or absence of coliform is?
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Which of the following is a food supply commonly provided to microorganisms during incubation for the multiple tube fermentation analysis?
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A laboratory device that facilitates the growth of microorganisms is?
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What steps must be taken when a single routine sample tests positive for total coliform?
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Which of the following are approved laboratory methods for the determination of coliform bacteria?
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How long must a water sample stay in the incubator during the confirmed test of the multiple tube fermentation analysis?
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For drinking water distribution systems with over 40 routine coliform samples per month, the maximum amount of positive coliform results allowed is?
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Which of the following is a protozoan?
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How long will it take to detect the presence of E. coli using the membrane filtration method?
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A laboratory device that sterilizes equipment and growth media is the?
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The multiple tube fermentation analysis consists of?
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The presence of coliform bacteria in a water sample?
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MMO-MUG is an essential ingredient in which of the following laboratory analyses?
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Which of the following laboratory analyses will detect the largest number of different kinds of microorganisms?
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Which of the following is not a characteristic of coliform bacteria?
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The combined time required to complete both the presumptive and confirmed steps of the MPN method is?
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What is the minimum distance that a ladder must extend beyond the top of a trench?
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Which of the following gases has the odor of rotten eggs?
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A fire is burning a pile of wood. What classification of fire extinguisher should be used to suppress this fire?
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Which of the following gases is toxic at the lowest concentration?
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Which of the following is a vital tool toward satisfying an employee's right to know about workplace hazards?
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Who must sign off the permit before a permit for confined space operation may commence?
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What is the risk associated with an oxygen-enriched atmosphere?
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What is the maximum allowed spacing between the upright members in a trench shoring assembly?
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Which of the following must apply for a work area to be considered confined space?
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A fire is burning a few barrels of waste motor oil. What classification of fire extinguisher should be used to suppress this fire?
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Which of the following gases is lighter (less dense) than air?
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Study Notes
Water Treatment Regulatory Standards
- Hydrogen peroxide is not an approved inactivation chemical under the Surface Water Treatment Rule (SWTR).
- Bacteria are not specifically addressed in the SWTR concerning categories of microorganisms.
- To achieve compliance with SWTR, a minimum reduction of 3 logs for Giardia is required.
Treatment Processes and Compliance
- Activated carbon is effective in removing algae-related odors from drinking water.
- Copper sulfate can be utilized to reduce algae growth in water supplies.
- The most common source of unpleasant odors in surface water is blue green algae.
- Consistently low combined filter effluent turbidity is the primary compliance measure for surface water treatment plants.
Pathogen Inactivation Requirements
- 3 logs of virus inactivation are mandated at properly operated direct filtration plants.
- Properly operated conventional treatment plants are awarded a virus removal credit of 2 logs.
- SWTR requires a 99.99% reduction in viruses.
- Complete removal and inactivation compliance for Giardia is necessary to meet Cryptosporidium requirements.
Particle Size and Filtration
- Visible particles to the unaided eye fall under the suspended category.
- Filtration effectively removes suspended particles, crucial for water clarity.
- Viruses fall into the colloidal category regarding particle size classification.
Microbial Testing Methods
- ColiLert (MMO-MUG) measures the presence of coliform bacteria in water samples.
- Lauryl tryptose is a food supply commonly used during microbial incubation for the multiple tube fermentation analysis.
- An incubator facilitates the growth of microorganisms essential for testing.
- Positive results in bacteriological tests indicate potential pathogen presence.
Incubation and Sample Testing
- Water samples must remain in the incubator for 48 hours during confirmed tests.
- For distribution systems with over 40 routine samples per month, no more than 5% can yield positive coliform results.
Classification of Microorganisms
- Giardia is classified as a protozoan.
- Membrane filtration detects E. coli in approximately 48 hours.
Laboratory Equipment and Safety Protocols
- An autoclave sterilizes equipment and growth media.
- The multiple tube fermentation analysis includes presumptive, confirmed, and completed tests.
- The presence of coliform bacteria suggests that pathogens may also be present in the sample.
Workplace Safety and Hazard Awareness
- A Material Safety Data Sheet (MSDS) is crucial for informing employees about workplace hazards.
- The competent person must sign off on confined space operation permits before activities commence.
- Oxygen-enriched atmospheres pose combustion risks, requiring careful monitoring.
Fire Safety and Storage Guidelines
- Different classifications of fires exist; for example, burning wood requires an A class fire extinguisher.
- Waste motor oil spills necessitate a B class fire extinguisher.
- Hydrogen sulfide has a characteristic rotten egg odor and is toxic at low concentrations; it also is lighter than air, specifically methane.
Structural and Operational Safety
- Maximum spacing between upright members in trench shoring assemblies is 8 feet.
- Ladders must extend at least 3 feet beyond the top of a trench for safe access and egress.
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Description
Test your knowledge on water treatment regulations and processes with this quiz focused on the Surface Water Treatment Rule (SWTR). Answer questions about inactivation chemicals and removal of algae odors in drinking water. Perfect for those studying environmental science or water quality management.
