MidWest Instruments


TEST YOUR SKILLS | WINTER 2020

1 Comment
 21 Dec 2020   Posted by BP Journal


This edition of Test Your Skills will look at hydraulics and its relationship to cross-connection control and backflow prevention. How and why water moves, along with what happens in water systems as a result of the installation of backflow prevention valves is knowledge individuals working in the field must understand. Let’s dig a little deeper into this part of the cross-connection puzzle. It’s time to pick up your “pencil” and test your knowledge. If you have any comments, questions or suggestions please contact Backflow Prevention Journal’s Technical Editor; Sean Cleary at sean.cleary@iapmo.org

Winter 2020

The term hydraulics refers to the movement of water or other liquids under pressure.
Hydraulic shock is commonly referred to as:
Bernoulli theorem states that as the velocity in a piping system decreases the system pressure will:
Pressure loss in a piping system per foot of elevation is:
If the system pressure in a water system at ground level was 80 PSIG, what would the pressure be in the water system 75 feet above ground level?
The maximum lift possible in a perfect vacuum at sea level is:
For backsiphonage to occur in the water system pressure at the cross-connection must experience a pressure:
Thermal expansion in a water system cannot occur with in systems that do not contain water heating equipment.
According to all three model plumbing codes used in the United States the maximum pressure allowed in a domestic water system is:
According to the 2021 Uniform Plumbing Code the minimum residual pressure in a building water system is:
Vacuum Breakers depend on atmospheric pressure to prevent backsiphonage in water systems.
High velocity and undersized piping in a water system can result in:
Static pressure is the pressure of a fluid in motion.
A pressure gauge installed at the base of a tank open to atmospheric pressure filled with water to a height of thirty-five feet would read:
To exert a pressure of 80 PSIG at the base of a riser open to atmosphere, the riser must be:

 

 

American Backflow Products


1 Comment

Alvin Kreutz
4 years ago



Sean, Thanks again for providing us with an opportunity to review our backflow and cross connection control skills. Truly amazing how one can forget or really have to stop and think about something that once was engrained in our mind. Your efforts are much appreciated.