Practice Test Geeks(CPA) Certified Pesticide Applicator Practice Test
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Application Equipment and Calibration Flashcards

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

Read the first 7 Application Equipment and Calibration flashcards as text

  1. What is the purpose of a pressure regulator in a pesticide spray system?

    Answer: To maintain consistent operating pressure regardless of pump fluctuations

    A pressure regulator maintains a steady, pre-set operating pressure by releasing excess pressure back to the tank or bypass line.

  2. In the formula GPA = (GPM × 5940) / (MPH × W), what does the value 5940 represent?

    Answer: A conversion constant that accounts for minutes and distance units

    The constant 5940 is derived from converting miles per hour and nozzle spacing into a per-acre basis (5280 ft/mile × 60 min/hr / 12 inches per foot × nozzle spacing denominator).

  3. Which nozzle type produces the largest droplet size and is therefore most suitable for minimizing drift in windy conditions?

    Answer: Air induction (venturi) nozzle

    Air induction nozzles mix air into the spray stream, producing large air-filled droplets that are much less prone to drift than conventional nozzles.

  4. A granule applicator is set to release 50 lbs of granules per acre. The label requires 60 lbs per acre. To increase output without changing ground speed, the applicator should:

    Answer: Use a larger orifice or wider opening on the metering gate

    Opening the metering gate wider increases the volume of granules released per unit of time, raising the application rate.

  5. When calibrating a rotary spreader, the applicator catches material in collection pans placed under the distribution pattern. What is the primary purpose of this step?

    Answer: To determine the effective swath width and distribution uniformity

    Catching granules in collection pans across the spread pattern reveals the effective swath width and whether distribution is uniform from center to edge.

  6. A check valve on a sprayer nozzle body serves primarily to:

    Answer: Prevent nozzle drip when the boom is shut off

    Check valves (anti-drip devices) hold the spray tip closed when pressure drops at shutoff, preventing post-application drip onto non-target areas.

  7. If a sprayer nozzle's output increases significantly over time without any change in pressure, this most likely indicates:

    Answer: The nozzle tip is worn and should be replaced

    Increased flow from a nozzle under the same pressure is a sign of nozzle wear — the orifice has enlarged, delivering more pesticide than intended.