Questions about gases, resin, silica and more

Jan. 1, 2013

Answers to these questions appear at www.watertechonline.com/certification-action-line.

1. Forced-draft deaeraters lower the levels of all dissolved gases in water.

          a) True

          b) False

2. Vacuum deaeraters lower the levels of all dissolved gases in water.

          a) True

          b) False

3. Degasification in conjunction with ion exchange is used to:

          a) remove alkalinity anions

          b) save caustic regenerant

          c) reduce required resin capacity

          d) all of the above.

4. Colder water may cause the loss of good resin out of the top of the resin tank.

          a) True

          b) False

5. Silica leakage in deionization systems may be caused by higher water temperature.

          a) True

          b) False

6. Conductivity measurements of water are independent of the water's temperature and pH.

          a) True

          b) False

7. Conductivity is a good way to indicate silica levels in water.

          a) True

          b) False

8. Samples from a flowing tap of high purity water can be collected and poured into a conductivity meter instrument to determine whether the specific resistance is at the 18 megohm-cm (or 0.056 mS/cm) specification.

          a) True

          b) False

9. Conductivity measurements can be used on the anion exchange effluent in deionization systems to determine leakage from the strongly acidic cation exchange effluent.

          a) True

          b) False

10. pH measurements can help monitor the performance of strongly acidic cation exchange resins in the hydrogen cycle and of strongly basic anion exchange resins in the hydroxide cycle.

          a) True

          b) False

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