Qwel Chapters 5-6
What is the change in pressure for a 1-foot increase in elevation?
0.433
What is the term for a grouping of irrigation valves?
A manifold
What steps would you take to conduct a check- up on irrigation system system at the beginning of the irrigation season.
Activate the valves. Look, listen, and feel. Walk the irrigation area.
Describe the function of an irrigation value
Allows water to pass through to the landscape when the diaphragm moves up, and stops water from passing through when the diaphragm moves down.
What devices protect the potable water supply from contamination?
Backflow devices
Why is it important to perform regular maintenance on irrigation systems?
Check the date and time, adjust the irrigation controller for a spring schedule, flush the system.
Describe the function of an irrigation value
Clean filters, turn off the water, install a freeze blanket on backflow device.
Why is it important not to mix drip emitters and bubbles on the same valve?
Essential to the proper operation of an efficient irrigation system over time
How much higher must an anti-siphon valve be installed, relative to the highest emission device on the zone, in order to operate properly?
Higher than the highest point of water in the pipe and emission devices it serves.
What is purple PVC pipe used for?
Recycle water
What are the two types of water pressure
Static pressure and operating pressure
True or False: Drip irrigation can achieve a higher uniformity of coverage than overhead irrigation.
True
True or False: Drip irrigation valves should have pressure regulation and filter components installed to operate properly.
True
True or False: For a flow rate, the smaller the pipe diameter the greater the friction loss.
True
True or False: Reduced pressure models are the most reliable backflow prevention device.
True
True or False: Rotating sprinklers offer more uniform coverage than fixed spray sprinklers.
True
True or Fase: Fixex spray sprinklers have a higher precipitation rate than rotors.
True
What steps would you take to conduct a check-up on irrigation system to be shit down at the end of the irrigation season?
True
What happens to water pressure as water travels through the irrigation system?
Water decreases due to the friction of water against pipe walls.
Describe how an irrigation valve is opened by the irrigation controller.
When one of the two ports is opened, allowing water in the upper chamber to leave the valve.
