Chemical Reaction Quiz

50 Questions | Total Attempts: 130

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Chemical Reaction Quizzes & Trivia

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Questions and Answers
  • 1. 
    Which water source is generally clear, cool, low in organic material, and frequently hard?
    • A. 

      Lake

    • B. 

      Pond

    • C. 

      Spring

    • D. 

      Stream

  • 2. 
    A lake surface water source, with considerable self-purification, is similar to which other type of surface water source?
    • A. 

      Pond

    • B. 

      Spring

    • C. 

      Ground

    • D. 

      Stream

  • 3. 
    Suspended matter of any nature present in water is
    • A. 

      Hardness

    • B. 

      Turbidity

    • C. 

      Organic matter

    • D. 

      Dissolved solids

  • 4. 
    Which impurity is used to determine the cycles of concentration (COC)?
    • A. 

      Free mineral acids

    • B. 

      Carbon dioxide

    • C. 

      Turbidityoxide

    • D. 

      Chloride

  • 5. 
    The presence of hydrogen ions causes a solution to be
    • A. 

      Turbid.

    • B. 

      Acidic.

    • C. 

      Neutral.

    • D. 

      Alkaline.

  • 6. 
    A pH of 5 in a water system, such as a boiler, aids in the development of
    • A. 

      Foam

    • B. 

      Scale

    • C. 

      Corrosion

    • D. 

      Hydroxides

  • 7. 
    Which items has no bearing on the formation of scale?
    • A. 

      Iron

    • B. 

      Hardness

    • C. 

      Alkalinity

    • D. 

      Temperature

  • 8. 
    Which of the types of alkalinity will not cause scale?
    • A. 

      Ionic alkalinity

    • B. 

      Carbonate alkalinity

    • C. 

      Hydroxide alkalinity

    • D. 

      Bicarbonate alkalinity

  • 9. 
    Corrosion caused by acid produced by carbon dioxide usually shows up as
    • A. 

      Pitting along the bottom of the piping.

    • B. 

      Grooves along the bottom of the piping.

    • C. 

      Pitting on the entire surface of the piping.

    • D. 

      Grooves on the entire surface of the piping.

  • 10. 
    The clarification process is used to remove
    • A. 

      All silica from feedwater

    • B. 

      Calcium and magnesium

    • C. 

      Suspended impuritiesm

    • D. 

      Dissolved solids

  • 11. 
    The process of chemically separating one substance out in solid form from a solution describes what water treatment process?
    • A. 

      Filtration.

    • B. 

      Clarification.

    • C. 

      Sedimentation.

    • D. 

      Chemical precipitation.

  • 12. 
    Which external water softening treatment process relies on a temperature of 212° F to remove hardness from system water?
    • A. 

      Cold lime soda

    • B. 

      Hot lime soda

    • C. 

      Sodium zeolite water

    • D. 

      Hydrogen zeolite water

  • 13. 
    What external water softening treatment process uses acid to help remove hardness from water?
    • A. 

      Hot lime soda

    • B. 

      Cold lime sodap

    • C. 

      Sodium zeolitep

    • D. 

      Hydrogen zeolite

  • 14. 
    During the external treatment of water to be used in a mechanical system, aeration is used to
    • A. 

      Increase the CO2 level

    • B. 

      Remove the CO2 level

    • C. 

      Increase the CO level

    • D. 

      Remove the CO level

  • 15. 
    How much of theinitial free oxygen can be removed by heating the boiler feedwater to the saturation temperature?
    • A. 

      80 to 85 percent

    • B. 

      85 to 90 percent

    • C. 

      90 to 95 percent

    • D. 

      95 to 100 percent

  • 16. 
    Which test should you use to make sure proper regeneration solution of the sodium zeolite softener?
    • A. 

      Total hardness

    • B. 

      Dissolved iron

    • C. 

      Diluted acid

    • D. 

      Brine

  • 17. 
    In a cooling system, what is necessary for algae to grow?
    • A. 

      Water, heat, and air

    • B. 

      Air, light, and water

    • C. 

      Heat, light, and water

    • D. 

      Air, light, and minerals

  • 18. 
    Crevice corrosion occurs when a solution contains varying amounts of dissolved
    • A. 

      Magnesium.

    • B. 

      Oxygen.

    • C. 

      Nitrogen.

    • D. 

      Calcium.

  • 19. 
    What item is particularly useful in monitoring the effectiveness of a chemical corrosion control program?
    • A. 

      Corrosion test coupon

    • B. 

      Corrosion cell

    • C. 

      Electrolytes

    • D. 

      COC

  • 20. 
    What item is particularly useful in monitoring the effectiveness of a chemical corrosion control program?
    • A. 

      Acidic corrosion

    • B. 

      The formation of scale

    • C. 

      Caustic boiler seam cracks

    • D. 

      Low levels of sludge formation

  • 21. 
    What type carryover is caused by high concentrations of alkalinity, dissolved solids, or suspended solids?
    • A. 

      Mist.

    • B. 

      Silica.

    • C. 

      Priming.

    • D. 

      Foaming.

  • 22. 
    When are water samples drawn from an operating boiler?
    • A. 

      As soon as possible after bottom blowdown.

    • B. 

      As soon as possible after adding chemicals.

    • C. 

      Before firing the boiler for the first time.

    • D. 

      Before chemicals are added or before regular blow down is accomplished.

  • 23. 
    The solenoid valve on the blowdown line of a cooling tower is energized when the
    • A. 

      PH reaches 5

    • B. 

      PH reaches 9

    • C. 

      Water’s conductivity exceeds the meter setting

    • D. 

      Water’s conductivity drops below the meter setting

  • 24. 
    Who on the base must approve the use of a new chemical or the disposal of waste water?
    • A. 

      Base civil engineer and shop supervisor

    • B. 

      Base commander and base civil engineer

    • C. 

      Bioenvironmental engineer and base commander

    • D. 

      Environmental engineer and bioenvironmental engineer

  • 25. 
    What type solution is used to boil out a new boiler?
    • A. 

      An acidic solution

    • B. 

      An alkaline solution

    • C. 

      A strong soap solution

    • D. 

      A distilled water solution