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
When calibrating a boom sprayer, you collect 980 mL from a single nozzle in 30 seconds while the sprayer travels at 5 mph. Which component of the calibration process does this measurement directly represent?
Answer: Nozzle flow rate
Collecting output from a nozzle over a set time directly measures nozzle flow rate, which is a key variable in determining application rate.
A hydraulic agitation system on a spray tank is primarily used to:
Answer: Keep pesticide mixtures uniformly suspended
Hydraulic agitation recirculates tank solution to prevent settling and keep wettable powders or other formulations uniformly suspended.
An applicator is using a backpack sprayer with a fan nozzle. To increase coverage width without changing nozzles, the applicator should:
Answer: Raise the nozzle higher above the target
Raising a fan nozzle higher above the target widens the spray pattern, though it may also increase drift potential.
Which type of pump is most commonly used in low-pressure ground sprayers for pesticide application and is known for its self-priming capability?
Answer: Roller pump
Roller pumps are widely used in low-pressure ground sprayers because they are self-priming, durable, and handle a variety of formulations.
A strainer screen with a mesh size of 50 is coarser or finer than a screen with a mesh size of 100?
Answer: Coarser, because fewer openings per inch means larger holes
Mesh size refers to the number of openings per linear inch, so a 50-mesh screen has fewer, larger openings than a 100-mesh screen.
When checking nozzle uniformity across a boom, a 10% variation in output between nozzles is generally considered:
Answer: The threshold above which nozzles should be replaced or cleaned
Industry guidelines typically recommend replacing or cleaning nozzles when output varies more than 10% from the manufacturer's rated flow.
An applicator calibrates a sprayer and finds it is applying 15% more pesticide per acre than the label specifies. The BEST corrective action is to:
Answer: Increase ground speed or reduce pressure to lower output
Increasing ground speed or adjusting pressure to reduce nozzle output are the proper equipment-based corrections to reduce application rate.