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Illinois Pesticide Applicator Exam - Rights-of-Way Questions and Complete Solutions Graded A+
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Illinois Pesticide Applicator Exam - Rights-of-Way Questions and Complete Solutions Graded A+
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Illinois PesticideApplicator Exam -
Rights-of-Way Questions
and Complete Solutions
Graded A+
Define compressed-air sprayers - Answer: Pump compresses air, allowing it to be sprayed; single stream
of spray with large droplets; hand-held or shoulder strap
Define backpack sprayers - Answer: Hand-operated piston or diaphragm pump; holds more gallons and
is better for long-term work
What are the two types of nozzles for manual sprayers? - Answer: Adjustable (hallow cone, straight
stream) and flat fan or flooding
Define effective sprayed width - Answer: The distance between spray passes
Pressure ____________ (increases/decreases) as material is sprayed - Answer: Decreases
How do you maintain pressure as material is sprayed? - Answer: Re-pressurize frequently, use a
pressure gauge, and use a pressure-regulating valve
Define pesticide injection equipment - Answer: Pesticide injected directly into plant's vascular system;
requires active transpiring
What is an advantage of injection equiptment? - Answer: No drift
, Define boom sprayers - Answer: Best choice for making broadcast applications; good uniformity; best
suited to flat, smooth terrain
Define boomless sprayers - Answer: Also used for broadcast applications; less uniformity than boom
sprayers; use off-center nozzles or spray heads
Define hose and reel sprayers - Answer: For spot, base, and leaf applications; amount of spray required
depends on size, shape, and leaf density; also good for chemical trimming; much less uniform
What two things does droplet size impact? - Answer: Coverage and drift potential
Spray droplets smaller than ______ microns are at high risk of drifting - Answer: 150
What are the three ways that droplet sizes can be expressed? - Answer: Volume Median Diameter,
percentage of spray volume in droplets smaller than 150 micros, and droplet spectrum classification by
categories (ASABE standard)
Define Volume Median Diameter - Answer: Droplet diameter at which half of spray volume is contained
in smaller droplets and half of the spray volume is contained in larger droplets
What is the Volume Median Diameter range for fine particles? - Answer: 106-235 microns
What is the Volume Median Diameter range for medium particles? - Answer: 236-340 microns
What is the Volume Median Diameter range for coarse particles? - Answer: 341-403 microns
What is the Volume Median Diameter range for very coarse particles? - Answer: 404-502 microns
What is the Volume Median Diameter range for extremely coarse particles? - Answer: 503-665 microns
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