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CPH Irrigation and Water Management Flashcards

6 cards from real CPH practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 CPH Irrigation and Water Management flashcards as text

  1. What does 'matched precipitation rate' (MPR) mean when specifying sprinkler heads?

    Answer: All heads in a zone apply water at the same rate per hour regardless of their arc size

    MPR heads are engineered so that heads covering different arc sizes (e.g., 90°, 180°, 360°) all emit the same precipitation rate, ensuring uniform application within a mixed zone.

  2. What is the primary function of a rain sensor on an automatic irrigation controller?

    Answer: To automatically suspend irrigation during or after sufficient rainfall

    A rain sensor interrupts the irrigation cycle when measurable rain has fallen, preventing unnecessary watering and water waste.

  3. A soil moisture sensor-based irrigation system controls watering by:

    Answer: Automatically triggering irrigation based on real-time soil moisture readings in the root zone

    Soil moisture sensors installed in the root zone measure actual moisture levels and allow the controller to irrigate only when soil moisture falls below a set threshold.

  4. Which type of valve is most commonly used to control individual irrigation zones in automatic systems?

    Answer: Electric solenoid valve

    Electric solenoid valves open and close via a low-voltage electrical signal from the controller, making them the standard for zone control in automatic irrigation systems.

  5. In a landscape irrigation audit, what does 'catch can testing' involve?

    Answer: Placing small containers throughout an irrigated area to measure actual precipitation rates and uniformity

    Catch can testing places identical containers throughout the irrigated area during a normal irrigation cycle to measure how much water each location receives, revealing uniformity and coverage issues.

  6. What is the primary benefit of using 'pressure-compensating' drip emitters?

    Answer: They deliver a consistent, accurate flow rate across a wide range of inlet pressures

    Pressure-compensating emitters maintain a steady, rated flow rate over a broad pressure range, ensuring uniform water delivery even on slopes where pressure varies significantly.