The best-laid plans are sometimes fraught with disappointing outcomes. There is one good reason for this type of failure. The people involved in implementing the plan are all imperfect. So, mistakes should be expected from time to time even after conducting a thorough DFMEA (Design Failure Mode and Effect Analysis) on the system you design.

A significant concern with any fluid transport/delivery system is pump selection. Careful initial thought and analysis must be carried out prior to a pump selection and, sometimes, trouble-shooting a not-so-good selection.

Review the list below regarding the classification of pumps. As you can see, these pumps are classified into positive displacement, kinetic, and jet/ejector type.

Positive Displacement





Progressing cavity

Lobe or cam

Flexible tube (peristaltic)






Radical flow (centrifugal)

Axial flow (propeller)

Mixed flow

Jet or ejector type





In your paper, answer the following:

*Choose one of the pump types.

*Indicate the pump you intend to analyze for your proposed modification.

*Do your research.

*Provide a specification sheet that has enough general information an engineer would need to choose a pump for their design purposes.

*Briefly (using more than just two or three sentences) discuss 2 different applications where the pump would prove to be a good choice.

*Discuss some disadvantages the engineer would face with this pump choice in both applications you specified.

*After running your system for 6 months, you start to notice some performance degradation. You remove the pump you chose and discover evidence of cavitation. Thoroughly discuss troubleshooting steps you could take to determine possible reasons cavitation is developing in the pump.