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Irrigation & Water Management Flashcards

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

Read the first 6 Irrigation & Water Management flashcards as text

  1. A rain sensor or rain shutoff device is used in irrigation systems to:

    Answer: Automatically suspend irrigation during and after rainfall

    Rain sensors detect rainfall and temporarily shut off the irrigation controller, preventing wasteful watering during and after rain events.

  2. What is 'water hammer' in irrigation systems?

    Answer: A pressure surge caused by rapid valve closure

    Water hammer is a pressure shock wave created when valves close rapidly, potentially damaging pipes, fittings, and heads in the irrigation system.

  3. In the US, which organization publishes water-efficient landscape standards relevant to CHT professionals?

    Answer: EPA WaterSense

    EPA WaterSense sets performance standards and certifies water-efficient irrigation products and practices widely referenced by horticulture professionals.

  4. Which irrigation scheduling method uses soil moisture sensors?

    Answer: Soil moisture-based scheduling

    Soil moisture-based scheduling uses sensors (tensiometers, capacitance probes) to trigger irrigation only when soil moisture falls below a set threshold.

  5. Drip emitters are typically rated by their flow rate in:

    Answer: Gallons per hour (GPH)

    Drip emitters deliver water very slowly and are rated in gallons per hour (GPH), with common rates of 0.5, 1, and 2 GPH.

  6. What causes 'dry spots' in an otherwise irrigated lawn?

    Answer: Poor head-to-head coverage or clogged nozzles

    Dry spots in irrigated turf typically result from inadequate head-to-head coverage, clogged nozzles, or misaligned heads creating gaps in the spray pattern.