Drip and Micro-Irrigation Systems Flashcards
6 cards from real CIT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Drip and Micro-Irrigation Systems flashcards as text
What causes 'root intrusion' in subsurface drip emitters?
Answer: Plant roots growing into and blocking emitter orifices
Root intrusion occurs when plant roots grow toward moisture and into drip emitter orifices, physically blocking water flow.
What is the most effective approach to preventing drip emitter clogging?
Answer: Proper filtration, periodic chemical treatment, and regular flushing
Emitter clogging is best prevented through adequate upstream filtration, periodic chlorine or acid injection, and regular flushing of laterals.
What is the maximum recommended length for 1/4-inch micro-tubing (spaghetti tubing) runs?
Answer: 18–24 inches
The maximum recommended length for 1/4-inch micro-tubing is 18–24 inches because longer runs create excessive friction loss that reduces emitter output.
Which chemical treatment prevents biological clogging (algae and biofilm) in drip systems?
Answer: Chlorine injection
Chlorine injection kills algae, bacteria, and biofilm that colonize drip tubing and emitter orifices, preventing biological clogging.
How should drip lateral lines be oriented when installed on a slope?
Answer: Horizontally across the slope (on contour)
Running drip laterals horizontally on contour maintains uniform pressure throughout the line, ensuring equal emitter output regardless of position.
What is the primary function of an air/vacuum relief valve in a drip irrigation system?
Answer: Release trapped air on startup and prevent vacuum from drawing soil into emitters at shutdown
Air/vacuum relief valves vent trapped air during startup and prevent negative pressure at shutdown from siphoning soil particles back into emitter orifices.