Time for a Quiz

Tom Walski, Ph.D, P.E, Senior Product Manager, Water

Last fall, I did a hydraulics quiz and readers seemed to enjoy it. So, here’s another one. See how you do and feel free to share. Answers are at the end, but don’t peek.

Quiz time!

What does NPSH stand for?
1 psi corresponds to how many feet of pressure head?
What is the disadvantage of a wet barrel fire hydrant?
What was the first modeling software that Haestad Methods (now part of Bentley Systems) developed in-house?
What are the two types of water loss from a distribution system?
What is I&I in a wastewater collection system?
What is “spread” at a stormwater gutter and inlet?
What kind of flow corresponds to a Froude number greater than one?
What is the name of Bentley’s product for infrastructure project collaboration?
Chlorine gas dissolves in water to form what species?

Answers

Net positive suction head
2.31 ft
Freezing, discharging water if broken
Pond Pack for pond design
Real loss (leakage) and Apparent loss (theft, metering errors)
Infiltration and Inflow
Amount of the roadway that is covered with water
Rapid, supercritical
ProjectWise
Hypochlorous acid and hypochlorite ion

As a follow-up to my blog on low pressures, my colleague, Stephen Jackson, wanted me to remind you that if you are interested in the pressure at any house, and you have customer meter elements in your model with known elevation, you can set the Calculation Option, “Calculate Customer Results” to “True”, and you will get the pressure at every customer meter (excluding service line losses). Just one more WaterGEMS/WaterCAD feature that a lot of users aren’t aware of. This blog marks the one-year anniversary of the first blog I posted in this series. I’ve received some good feedback, so I’ll keep on doing it. (If you want to be dropped, send me an email at tom.walski@bentley.com). I have a lot more ideas. Comments and suggested topics are welcome. You can even volunteer to write a blog if you have an idea.

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