February 2012, Vol. 24, No.2

Certification Quiz

Test your knowledge of pumps and pumping

    True or False Questions:
  1. Adding additional stages to a vertical turbine well pump will increase the flow.
  2. The wrong rotation would likely cause a centrifugal pump to work properly for a while, then lose suction.
  3. There is a relationship between head and flow for a centrifugal pump: As head increases, flow decreases.

  4. Multiple Choice Questions:
  5. Opening or closing a valve too quickly can cause what?
  6. A. Cavitation
    B. Water hammer
    C. Induced draft flow
    D. Premature wear on the valve gaskets

  7. What is the term for stating the difference between the “static water level” and the “pumping water level”?
  8. A. Cone of depression
    B. Radius of influence
    C. Drawdown
    D. Water table influence

  9. How is the term “water table” best defined?
  10. A. The upper surface of groundwater
    B. The well pump level
    C. The pumping level reached by drilling
    D. The pumping level for use in swimming pools

  11. How must a positive displacement pump always be operated?
  12. A. With the discharge valve open
    B. In the automatic mode to allow pumping as necessary
    C. With the air gap closed to prevent leakage
    D. In the manual mode to ensure it does not shut off

  13. In addition to serving as a lubricant, what does a pump seal water do?
  14. A. Allows for the shaft bearings to remain cool during operation
    B. Allows for the pump to hold its prime
    C. Keeps gritty material from entering the stuffing box
    D. Helps keep proper alignment

  15. What is the proper preventive maintenance to avoid the buildup of calcium carbonate on the poppet valve of a hypochlorinator?
  16. A. To pump a solution of caustic soda through the equipment
    B. To use a rubber hammer to periodically loosen the buildup
    C. To occasionally dismantle the pump and clean the poppet valve
    D. To pump a 1.5% solution of hydrochloric acid through the equipment

  17. When should pumps be lubricated?
  18. A. When they become noisy
    B. At least once a week
    C. As recommended by the manufacturer’s specifications
    D. When time allows

  19. How is the term “water table” best defined?
  20. A. 15 ft
    B. 6 ft
    C. 10 ft
    D. 85 ft

  21. A 10-in. pipe has a smooth, even calcium buildup that is 1-in. thick. What is the percent loss of volume attributed to the buildup?
  22. A. 19%
    B. 15%
    C. 10%
    D. 36%

  23. How is the term “water table” best defined?
  24. A. 40 gal/min•ft of drawdown
    B. 4 gal/min•ft of drawdown
    C. 10 gal/min•ft of drawdown
    D. 12 gal/min•ft of drawdown

Questions written by Jared Gabel, applications engineer at Grundfos (Olathe, Kan.), and reviewed by the Operations forum Editorial Advisory Board and the Association of Boards of Certification (Ankeny, Iowa) Wastewater Treatment Validation and Examination Committee. 

Answer Key:
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