Water Treatment Plant Operation Volume 2 Chapter 19

33 Questions | Total Attempts: 266

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Water Treatment Plant Operation Volume 2 Chapter 19

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Questions and Answers
  • 1. 
    Digital instruments you’ll be reading as a pointer against a marked scale 
    • A. 

      True

    • B. 

      False

  • 2. 
     Never directly pressurized air stream toward any part of your body or anyone else’s party 
    • A. 

      True

    • B. 

      False

  • 3. 
      If you must doc, crawl, climb, or squeeze into a space, it is considered a confined space 
    • A. 

      True

    • B. 

      False

  • 4. 
     Strains and sprains are probably the most frequent injuries and water treatment facilities 
    • A. 

      True

    • B. 

      False

  • 5. 
    Rotameters are used to indicate approximate liquid or gas flow  
    • A. 

      True

    • B. 

      False

  • 6. 
     Differential pressure sensing tubes(Venturi’s) are less accurate than orifice plates when used to measure flow 
    • A. 

      True

    • B. 

      False

  • 7. 
     Digital devices have greater power requirements than analog devices; therefore, they require larger and more complex backup systems 
    • A. 

      True

    • B. 

      False

  • 8. 
     There are two main types of chart recorders: the strip chart and the circular chart 
    • A. 

      True

    • B. 

      False

  • 9. 
     Computerized controllers can be programmed to precisely trailer their control modes to optimize a particular process 
    • A. 

      True

    • B. 

      False

  • 10. 
     Which instrumentation O&M tasks or operators expected to perform
    • A. 

      Instruments standardization and preventative maintenance measures

    • B. 

      Repair and replace defective instruments

    • C. 

      Specifying spare plans for new instrumentation systems

    • D. 

      Right computer programs for instrumentation controls

  • 11. 
     What is a process variable
    • A. 

      The physical or chemical quantity that is measured or controlled in A wastewater treatment process

    • B. 

      How closely and instrument measures the true or actual value of a process variable

    • C. 

      How closely the device confirm reproduce or given reading (or measurement) time after time

    • D. 

      The smallest change in a process variable able to produce an appropriate response from instrument

  • 12. 
     What is sensitivity
    • A. 

      The physical or chemical quantity that is measured or controlled in A wastewater treatment process

    • B. 

      How closely and instrument measures the true or actual value of a process variable

    • C. 

      How closely the device confirm reproduce or given reading (or measurement) time after time

    • D. 

      The smallest change in a process variable able to produce an appropriate response from instrument

  • 13. 
    What is instrument linearity
    • A. 

      An abbreviated calibration where only one standard is measured

    • B. 

      That portion of instruments completed range within which the instrument is acceptable accuracy

    • C. 

      The complete test of an instrument by measuring several(secondary) standards and it’s

    • D. 

      The term to describe how well it Device tracks a series of standards through its effective range

  • 14. 
     What capabilities must they person have to be confined space qualified
    • A. 

      Calibrating and operating atmospheric pressure devices

    • B. 

      Performing all tasks conducted within the confined space

    • C. 

      Specifying the control procedures and protective actions necessary to ensure a safe working environment

    • D. 

      Working within the space until the job is complete

  • 15. 
     Wear some pressure sensors fitted with surgery over range protection(Snubbers)
    • A. 

      Wear some pressure sensors fitted with surgery over range protection(Snubbers)

    • B. 

      To limit the effect pressure spikes or water hammer have on the instrument

    • C. 

      To protect the pipe from bursting under excessive pressures

    • D. 

      The record instantaneous peak pressure and alert the need to inspect for leaks

  • 16. 
    What information about liquid levels do single point detectors  sense
    • A. 

      Continuous level sensing

    • B. 

      Fix elevation

    • C. 

      Option 3 Slight motion

    • D. 

      Water pressure

  • 17. 
     What is a problem encountered with probes used to measure water depth
    • A. 

      Functioning only when the probe sees liquid

    • B. 

      Need to replace the probes daily for accurate measurements

    • C. 

      The accumulation of scum or kicking(Such as grease) on the surface of the rods

    • D. 

      The application of a small voltage by the systems power supply

  • 18. 
     Most flow instrumentation provides what kind of values
    • A. 

      Flow losses and totalized volumes

    • B. 

      Flow of electricity and total energy consumed

    • C. 

      Flow velocity and total velocity

    • D. 

      Rate of flow and total flow

  • 19. 
     What can cause older water meters to under register 
    • A. 

      Bearing wear and gear train friction

    • B. 

      Older water is more dilute

    • C. 

      Short-circuiting between meter and recorder

    • D. 

      Water quality constituents are better blended with the water

  • 20. 
     What is the term for the process of calculating  and presenting an ongoing running total of flow volumes passing through meter
    • A. 

      Cumulating

    • B. 

      Metering

    • C. 

      Totalizing

    • D. 

      Volumemetracating

  • 21. 
     Why should operators learn how to shift all controllers to manual operation
    • A. 

      To learn the value of controllers

    • B. 

      To observe changes and downstream processes

    • C. 

      To prepare operator training programs

    • D. 

      To take over control of a critical system when necessary in an emergency

  • 22. 
    What’s situation will activate a low pressure switch on the suction side of the pump to prevent the pump from running in a larger pump system
    • A. 

      A suction valve is open

    • B. 

      A tank is empty

    • C. 

       Cavitation starts

    • D. 

      The peak power rates increase

  • 23. 
     How can reliable measurement systems have a long service life
    • A. 

      By careful operation and regular maintenance of the instruments components

    • B. 

      By continually calibrating the measurement system

    • C. 

      By frequent training of operators responsible for the system

    • D. 

      Buy regular inspection of the measuring system

  • 24. 
     Which types of   powered mechanical equipment may suddenly start or move when you’re not expecting it
    • A. 

      Chemical feeders

    • B. 

      Computers

    • C. 

      Electrical motors

    • D. 

      Turbidity meters

    • E. 

      Turbidity meters

  • 25. 
     Dangerous air contamination presents a threat of causing which hazard
    • A. 

      Acute illness

    • B. 

      Death

    • C. 

      Death

    • D. 

      Disease

    • E. 

      Injury

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