IOWA AERIAL APPLICATORS EVALUATION EXAMS
2025/2026 QUESTIONS AND SOLUTIONS GRADED A+
✔✔Good communication with the ground crew before and during an application
operation may result in: - ✔✔Fewer job delays.
✔✔Managing off-target pesticide drift during an aerial application is: - ✔✔The pilot's
responsibility.
✔✔Off-target pesticide drift is the offsite movement of the pesticide that occurs: - ✔✔At
the time of pesticide application or soon thereafter.
✔✔The color code for a nozzle that produces spray droplets in the extra fine category
is: - ✔✔Purple.
✔✔Generally, the optimum time for making an aerial application of a liquid when droplet
evaporation is a concern is: - ✔✔Early morning.
✔✔Which of the following factors has NO effect on off-target pesticide drift? -
✔✔Constant 3 mph wind.
✔✔Wider-angle spray nozzles usually produce __________ droplets than narrower
spray nozzles. - ✔✔Finer.
✔✔The most effective boom lengths for reducing the amount of drift are: - ✔✔75% of
the wingspan or the rotor span.
✔✔Aside from external factors, the most important factors affecting off-target drift are: -
✔✔The size of the spray droplets and the percentage of droplets within a certain size
range.
✔✔Driftable fines are droplets in the size range of: - ✔✔50 to 200 microns.
✔✔The droplet size at which spray drift becomes a concern is: - ✔✔200 microns and
below.
✔✔Aircraft suitable for aerial application of pesticides must be: - ✔✔Able to lift,
transport, and disperse pesticides safely.
✔✔One of the reasons for an adequate vent in the aircraft pesticide tank is to: -
✔✔Prevent a vacuum from altering the normal flow of liquid.
, ✔✔The purpose of baffles inside a liquid spray tank is to: - ✔✔Reduce sloshing of the
liquid during flight
✔✔Hydraulic agitation of the mixture in the aircraft spray tank requires: - ✔✔Sufficient
pump output capacity.
✔✔A proper functioning positive cutoff valve with suck-back feature will supply
______________pressure to the boom and nozzles when the spray flow is stopped. -
✔✔High positive.
✔✔The purpose of bleed valves at the ends of the spray boom is to: - ✔✔Prevent from
building up from pressure trapped air when the valve is opened. spray
✔✔To accommodate for the influence of prop wash on spray pattern, it is necessary to:
- ✔✔Reposition the nozzles on the boom. spray
✔✔The advantage of an electronic sprayer vollume controller is that it: - ✔✔Reduces or
increases the spray output as airspeed changes.
✔✔Ram-air spreaders can: - ✔✔Compromise fixed wing aircraft performance.
✔✔The purpose of adjusting ram-air spreader vanes is to: - ✔✔Improve the granule
distribution pattern.
✔✔The color of very fine spray nozzles are: - ✔✔Red
✔✔The color of fine spray nozzles are: - ✔✔Orange
✔✔The color of medium spray nozzles are: - ✔✔Yellow
✔✔The color of coarse spray nozzles are: - ✔✔Blue
✔✔The color of very coarse spray nozzles are: - ✔✔Green
✔✔The color of extremely coarse spray nozzles are: - ✔✔White
✔✔The color of ultra coarse spray nozzles are: - ✔✔Black
✔✔ The purpose of calibration is to: - ✔✔Apply the correct amount of pesticide.
✔✔Applying a pesticide at a rate that is higher than the pesticide label rate is: -
✔✔Illegal.
2025/2026 QUESTIONS AND SOLUTIONS GRADED A+
✔✔Good communication with the ground crew before and during an application
operation may result in: - ✔✔Fewer job delays.
✔✔Managing off-target pesticide drift during an aerial application is: - ✔✔The pilot's
responsibility.
✔✔Off-target pesticide drift is the offsite movement of the pesticide that occurs: - ✔✔At
the time of pesticide application or soon thereafter.
✔✔The color code for a nozzle that produces spray droplets in the extra fine category
is: - ✔✔Purple.
✔✔Generally, the optimum time for making an aerial application of a liquid when droplet
evaporation is a concern is: - ✔✔Early morning.
✔✔Which of the following factors has NO effect on off-target pesticide drift? -
✔✔Constant 3 mph wind.
✔✔Wider-angle spray nozzles usually produce __________ droplets than narrower
spray nozzles. - ✔✔Finer.
✔✔The most effective boom lengths for reducing the amount of drift are: - ✔✔75% of
the wingspan or the rotor span.
✔✔Aside from external factors, the most important factors affecting off-target drift are: -
✔✔The size of the spray droplets and the percentage of droplets within a certain size
range.
✔✔Driftable fines are droplets in the size range of: - ✔✔50 to 200 microns.
✔✔The droplet size at which spray drift becomes a concern is: - ✔✔200 microns and
below.
✔✔Aircraft suitable for aerial application of pesticides must be: - ✔✔Able to lift,
transport, and disperse pesticides safely.
✔✔One of the reasons for an adequate vent in the aircraft pesticide tank is to: -
✔✔Prevent a vacuum from altering the normal flow of liquid.
, ✔✔The purpose of baffles inside a liquid spray tank is to: - ✔✔Reduce sloshing of the
liquid during flight
✔✔Hydraulic agitation of the mixture in the aircraft spray tank requires: - ✔✔Sufficient
pump output capacity.
✔✔A proper functioning positive cutoff valve with suck-back feature will supply
______________pressure to the boom and nozzles when the spray flow is stopped. -
✔✔High positive.
✔✔The purpose of bleed valves at the ends of the spray boom is to: - ✔✔Prevent from
building up from pressure trapped air when the valve is opened. spray
✔✔To accommodate for the influence of prop wash on spray pattern, it is necessary to:
- ✔✔Reposition the nozzles on the boom. spray
✔✔The advantage of an electronic sprayer vollume controller is that it: - ✔✔Reduces or
increases the spray output as airspeed changes.
✔✔Ram-air spreaders can: - ✔✔Compromise fixed wing aircraft performance.
✔✔The purpose of adjusting ram-air spreader vanes is to: - ✔✔Improve the granule
distribution pattern.
✔✔The color of very fine spray nozzles are: - ✔✔Red
✔✔The color of fine spray nozzles are: - ✔✔Orange
✔✔The color of medium spray nozzles are: - ✔✔Yellow
✔✔The color of coarse spray nozzles are: - ✔✔Blue
✔✔The color of very coarse spray nozzles are: - ✔✔Green
✔✔The color of extremely coarse spray nozzles are: - ✔✔White
✔✔The color of ultra coarse spray nozzles are: - ✔✔Black
✔✔ The purpose of calibration is to: - ✔✔Apply the correct amount of pesticide.
✔✔Applying a pesticide at a rate that is higher than the pesticide label rate is: -
✔✔Illegal.
