waste water ch14

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  1. You, the operator, must accept the task of seeing to it that your plant is maintained in such a manner as to continually provide a safe place to work.
  2. Acquired Immune Deficiency Syndrome (AIDS) can be contracted by operators from exposure to raw waste water.
  3. Operators may wear work clothes home because diseasesare not transmitted by work clothes
  4. Operators will lose the ability to smell hydrogen sulfide's"rotten egg" odor only after a long exposure.
  5. Engineering controls are considered the most effective means of protecting operators from chemical contaminants.
  6. Electric shock rarely causes serious injury
  7. Operators must be aware of equipment that produces high noise levels and use safeguards such as hearing protectors that eliminate or reduce noise to acceptable levels.
  8. When working in pumping stations, always be aware of the possibility of oxygen deficiency/enrichment, explosive or flammable gases, and toxic gases that could be generated in,or be discharged into, the sewers.
  9. Never start a positive displacement pump against an openvalve
  10. Positive displacement pumps should be equipped with apressure switch to shut the unit off before dangerous pressuresare encountered
  11. Accidental industrial spills can be toxic to you and the organismsin your treatment processes and corrosive to youre quipment
  12. Biocides frequently cannot be detected until after the organismsin the treatment processes have been killed.
  13. Always lean on safety chains when collecting samples.
  14. Remember to add acid to water, but never the reverse.
  15. Chlorine and sulfur dioxide are very different when considering safety and health aspects of the two chemicals.
  16. An effective safety training program must start with the operators.
  17. Hard hats, safety foot wear, eye protection, and hearing protection apply to all personnel in designated areas and specific jobs
  18. How can you, the operator, protect yourself and other plant personnel or visitors?
    By establishing safety procedures and then by seeingthat they are followed
  19. Which individuals should be included in a Blood borne Pathogens (BBP) program?
    Individuals designated to provide first aid or CPR during any confined space job
  20. What is the only effective way of ensuring safe atmospheric conditions prior to entering a confined space
    Test the atmosphere with an appropriate monitor(s) atvarious levels and locations throughout the space
  21. What does a lockout device do?
    Uses a positive means such as a lock to hold a switch or valve in a safe position and prevent the equipment from be coming energized or moving
  22. What are the important objectives of providing operators with training regarding the plant's lockout/ragout program?To ensure that
    The purpose and function of the program are understoodand that the knowledge and skill required for thesafe use of energy controls are gained
  23. What is the purpose of traffic control in a work area?
    To provide safe and effective work areas and to warn,control, protect, and expedite vehicular and pedestrian traffic
  24. Which type of fire extinguisher is recommended for pumping stations?
    All-purpose, ABC chemical-type
  25. What is the greatest hazard involved in working on or in a clarifier? The danger of
  26. Why should a spill of digesting sludge be cleaned up immediately?
    To prevent the possible accumulation of gases or a slippery walk way
  27. When changing chlorine or sulfur dioxide containers, how should you check for leaks?
    By using aqua ammonia vapor
  28. What should be done if you smell chlorine or sulfur dioxide when opening the door to the storage area?
    Immediately close the door, leave the ventilation on,and seek assistance
  29. How can foaming in wet wells be controlled?
    Using foam detection devices programmed to automatically feed an antifoaming agent
  30. Why is a short section of flexible tube on each water outlet in the laboratory recommended?
    To flush away harmful chemicals from the eyes and skin
  31. Which materials are consumed by a Class A fire?
    Ordinary combustibles, such as wood, paper, and cloth
  32. How can operators obtain information on materials that could be introduced into the collection system?
    From industrial pretreatment inspectors
  33. How can accidents be prevented?
    • By acquiring a good knowledge of the hazards unique to your job
    • By applying a few basic safety rules
    • By using good common sense
  34. Fall arrest systems must be inspected prior to each use to detect which items that could compromise the user's safety?
    • Damage
    • Deterioration
    • Wear
  35. In waste water treatment, we are concerned primarily with dangerous air contamination due to which items?
    • Hydrogen sulfide
    • Methane
    • Oxygen deficiency
    • Oxygen enrichment
  36. How can toxic gases enter your waste water treatment plant?As a result of
    • Accidental spills
    • Illegal disposal of hazardous materials
    • Industrial discharges
  37. The seriousness of a chemical hazard depends on which factors?
    • Concentration of the chemical
    • Exposure time
  38. How can operators avoid injury from hazardous chemicals?
    • Be sure all hazardous chemicals are clearly labeled
    • Obtain and read the health and safety data about the chemical before using the chemical
  39. If your plant uses radioactive isotopes in control elements or in laboratory equipment, you may be required to comply with which requirements of the US Nuclear Regulatory Commission (NRC) regulations?
    • Licensing
    • Performing radiation surveys to determine potential exposure levels for personnel
    • Record keeping
    • Testing source integrity
    • Training
  40. Which items are basic safety rules when working around electrical equipment?
    • Always lock out and tag out any electrical equipment being serviced and never remove anyone else's lock or tag
    • Do not use portable ladders with conductive side rails
    • Inspect extension cords for abrasion, insulation failure,and evidence of possible internal damage
    • Keep your mind on the potential hazard at all times
    • Never override any electrical safety device
  41. Which items are basic lock out/tag out procedures?
    • After the work on the equipment is complete, all tool shave been removed, guards have been re installed, and employees are in the clear, remove all lockout or tag out devices
    • If the equipment is operating, shut it down by the normal stopping procedure
    • Lock out or tag out the energy isolating device with an assigned individual lock or tag
    • Notify all affected employees that a lockout or tagged system is going to be used and the reason why
    • When the equipment is locked out or tagged out, thework on the equipment may begin
  42. Employee training for work in high-noise areas or during high-noise activities must include information on which items?
    • Instruction on the selection, fitting, use, and care of hearing protectors
    • The effects of noise on hearing
    • The purpose of hearing protectors and the advantages,limitations, and effectiveness of various types
    • The purpose of the audiometric testing and an explanationof the test procedures
  43. Which types of hazards could operators be exposed to when working in manholes?
    • Engulfment hazards, such as flooding from waste water,sludge, or chemicals
    • Infections and diseases from bacteria, parasites, and viruses found in the waste water stream
    • Physical injury, such as sprains, strains, scrapes, and cuts due to uneven footing, inadequate working room, poor balance, or awkward positioning
    • Toxic substances illegally or accidentally discharged intothe collection system or plant drainage system
  44. In excavation work, which soil conditions or other factors can contribute to the chances of a cave-in?
    • Freezing conditions
    • High moisture content
    • Low cohesion
    • Recent excavation at the same site
  45. Which conditions must be met before you accept chlorine containers delivered to your plant?
    • All threaded connections should be clean and not worn or cross threaded
    • Container must be easily lifted by one person when full
    • Container should stamped with the last date it was pressure tested, which should be within five years of the delivery date
    • Cover cap should be securely in place over the valve mechanism
    • New, approved gaskets should be provided with eachcontainer
  46. If gasoline reaches the wet well in the head works of the treatment plant, which actions should be taken?
    • Apply as much ventilation as possible to prevent an explosive atmosphere from developing
    • Do not allow any flames, sparks, or other sources of ignition in the area
    • Keep personnel away from the area
    • Monitor the atmosphere for toxic and explosive conditions
    • Try to remove the gasoline from the surface of the wetwell with skimmers (if available) or with a portable pump
  47. When a discharge of sodium sulfide from one industry mixes with the discharge of an acid waste from another industry,the mixture can produce extremely hazardous concentrations of hydrogen sulfide and which conditions?
    • Explosive
    • Flammable
    • Odorous
    • Toxic
  48. A fire at a treatment plant could lead to which problems
    • A serious threat to the buildings and equipment
    • A serious threat to the health and safety of operators
    • Plant may have difficulty adequately treating the influent waste water
  49. How can fires be prevented?
    • By keeping all combustible materials away from furnaces and other sources of ignition
    • By keeping fire doors, exits, stairs, fire lanes, and fire fighting equipment clear of obstructions
    • By maintaining a neat and clean work area, preventing accumulation of debris and combustible materials
    • By putting oil- and paint-soaked rags in covered metal containers and regularly disposing of them in a safe manner
    • By reporting any fire hazards you see, especially electricalhazards, which are sources of many fires
  50. Where in a waste water treatment plant could a cross connection occur between your potable (drinking) water supply and waste water?
    • Feed water to boilers
    • Hose bibs below grade where they may be subject to flooding
    • Water seals on pumps
  51. First-line supervisors should be responsible to see that operators observe or understand which elements of the plant's safety program?
    • Observe necessary precautions when performing operations,maintenance, or laboratory tasks
    • Understand and properly follow established work procedures for their safety and the safety of others
    • Understand the hazards of the various processes at the plant
  52. Hazardous materials can be broken down into which general categories?
    • Asphyxiants
    • Corrosives
    • Flammables and explosives
    • Infectious agents
    • Toxics
  53. What information is found on a Material Safety Data Sheet(MSDS) regarding a specific chemical?
    • Effects of exposure
    • Flammability rating
    • Safe exposure level
    • Symptoms of exposure
    • Type of first-aid procedures
Card Set
waste water ch14
florida class c waste water exam
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