WTECH 182 Pump and Pumping Systems
Assignment #8:Normal Operating Conditions-End Suction & Split Case Pumps

Instructions
Read the chapter specified in the text listed below, then answer the Study Questions.You will maximize your learning and score if you answer the Study Questions in your own words.

Submit your answers to the Study Questions according to these guidelines:

  • save your assignment as a Microsoft Word document;
  • format your assignment with no spaces between lines and with 1 inch margins on all sides;
  • use normal font (no bold, italic or underline, please) Times New Roman (PC) font size 12 or Times (Apple) font size 12;
  • place the course number, the title of the assignment and your full name at the beginning of your assignment;
  • list Study Question answers by number (it's not necessary to re-write the Study Questions themselves);
  • submit the assignment as an e-mail attachment to the instructor at by the due date/time listed in the course schedule;
  • make it clear in your e-mail subject line which course and assignment number you are submitting (for example, your e-mail subject line might read: WTECH 182 Reading Assignment #1); and
  • submit each assignment as a separate e-mail (only one assignment per e-mail, please!).

Evaluation
In order to be accepted for evaluation, this assignment must be submitted by the due date/time listed in the course schedule and in the format outlined in the instructions section above.The instructor will randomly select study questions from this assignment for evaluation. Selected study questions will be evaluated based on the following criteria:

2 points / Response correctly answers the question, is factually correct; and is thorough.
2 points / Response demonstrates comprehension of material and understanding of concepts by using student's own words.
1 point / Response demonstrates good writing skills including appropriate use of standard English with attention to mechanics, grammar, punctuation and usage.

Text
Arasmith, Skeet.Pumps & Pumping, Eighth Edition. ACR Publications, Inc., 1298 Elm Street SW, Albany, OR97321, 2000.

Chapter
Lesson 9, "Normal Operating Conditions-End Suction and Split Case Centrifugal Pumps."

Study Questions

  1. Describe how centrifugal pumps installed in suction lift configurations “lift” water.
  2. Describe the factors that limit the energy available from atmospheric pressure in a suction lift configuration.
  3. Describe considerations in a suction system that affect pumping system performance.
  4. What is cavitation?
  5. What causes cavitation?
  6. How can cavitation be avoided?
    Note: The section on Pump Performance Response to Changing Conditions on pages 313-315 will not be covered here. This topic is addressed in Assignment #10.
  7. Describe three indications that a pump has lost prime.
  8. What causes air binding?
  9. Describe start-up procedures that might establish prime in a pump.
  10. Describe items that should be included in a routine stuffing box inspection.
  11. How can a potential cross-connection be avoided when an external seal water system is used?
  12. How should pumping system bearings be monitored?
  13. Describe how improper lubrication might cause bearing failure.
  14. What are the two most important purposes of lubrication?
  15. What are the two most common forms of lubricants?
  16. Describe the full fluid film theory.
  17. Describe selection criteria for oil.
  18. How is grease made?
  19. What types of grease are water resistant?
  20. What is the basic criteria for bearing lubrication frequency?
  21. Describe the four types of grease lubrication systems.
  22. Describe the four types of oil lubrication systems.
  23. How might sleeve bearings in a lineshaft turbine pump be lubricated?
  24. How might roller bearings be lubricated?
  25. Describe the process for greasing a roller bearing that has a drain port.