IOWA AERIAL APPLICATORS TEST PAPER 2025/2026
QUESTIONS AND SOLUTIONS GRADED A+
✔✔Steps inhalation exposure first aid - ✔✔1. Put on respirator before rescue
2. Get victim to fresh air
3. Loosen tight clothing
4. Watch for signs CPR is needed
5. Keep chin up
6. Prevent chilling
7. Contact medical help
✔✔Steps oral exposure first aid - ✔✔1. Determine what was swallowed
2. Call poison control center
3. No food or drink
✔✔What is drift - ✔✔Physical movement of pesticide through the air from target site to
non target site
✔✔Why is drift a problem - ✔✔1. Damage on non targets
2. Violates label instructions
3. Expensive and wasteful
✔✔Main factor that affects drift - ✔✔Droplet size
✔✔Four factors that affect droplet size - ✔✔1. Equipment
2. Formulation
3. Adjuvant
4. Weather
✔✔Equipment factors that affect droplet size - ✔✔1. Nozzle type
2. Orifice diameter
3. Spray angle
4. Nozzle angle
5. Travel speed
6. Spray pressure
✔✔What pesticide formulation is most likely to drift - ✔✔1. Dust formulations
✔✔Weather conditions that affect drift - ✔✔1. Wind velocity
2. Atmospheric stability
3. Temperature
4. Relative humidity
5. Micro weather
, ✔✔How does relative humidity affect droplet size - ✔✔Low RH causes droplets to
shrink resulting in longer airborne times
✔✔What is micro weather - ✔✔Weather conditions at ground level or within plant
canopy at target site
✔✔Name and describe the navigation methods - ✔✔1. Landmark - fixed objects
2. Dead reckoning - elapsed time at constant speed
3. LORAN - ground generated radio signals
4. GPS - satellite generated microwave signals
✔✔How does GPS work - ✔✔Uses satellites, satellite tracking stations, and signal
receivers to identify any spot on earth
✔✔3 main components of GPS - ✔✔1. Space segment
2. Control segment
3. User segment
✔✔What is DGPS - ✔✔Two receivers, one stationary and one mobile. Reduces C/A
signal error and improves precision
✔✔NDGPS - ✔✔Provides reliable GPS satellite data to public for free
✔✔What is main commercial DGPS - ✔✔North American omnistar company maintains
11 permanent base stations. These stations track satellites and compute corrections
every 600 milliseconds
✔✔How does omnistar locate the users receiver - ✔✔Treats receiver as a virtual base
station allowing the user to operate independently over the coverage area
✔✔Components of a basic DGPS set - ✔✔1. Light bar
2. Mobile receiver
3. GPS antenna
✔✔How does light bar help aerial application - ✔✔Allows pilot to visualize off track
errors
✔✔GPS equipment available for agricultural aircraft - ✔✔1. On board computers
2. Spray output controllers and sensors
3. Computer software that links DGPS to applicator needs
✔✔How can on board DGPS computer help aerial application - ✔✔Helps with mapping
and navigation and can suggest a spray pattern
QUESTIONS AND SOLUTIONS GRADED A+
✔✔Steps inhalation exposure first aid - ✔✔1. Put on respirator before rescue
2. Get victim to fresh air
3. Loosen tight clothing
4. Watch for signs CPR is needed
5. Keep chin up
6. Prevent chilling
7. Contact medical help
✔✔Steps oral exposure first aid - ✔✔1. Determine what was swallowed
2. Call poison control center
3. No food or drink
✔✔What is drift - ✔✔Physical movement of pesticide through the air from target site to
non target site
✔✔Why is drift a problem - ✔✔1. Damage on non targets
2. Violates label instructions
3. Expensive and wasteful
✔✔Main factor that affects drift - ✔✔Droplet size
✔✔Four factors that affect droplet size - ✔✔1. Equipment
2. Formulation
3. Adjuvant
4. Weather
✔✔Equipment factors that affect droplet size - ✔✔1. Nozzle type
2. Orifice diameter
3. Spray angle
4. Nozzle angle
5. Travel speed
6. Spray pressure
✔✔What pesticide formulation is most likely to drift - ✔✔1. Dust formulations
✔✔Weather conditions that affect drift - ✔✔1. Wind velocity
2. Atmospheric stability
3. Temperature
4. Relative humidity
5. Micro weather
, ✔✔How does relative humidity affect droplet size - ✔✔Low RH causes droplets to
shrink resulting in longer airborne times
✔✔What is micro weather - ✔✔Weather conditions at ground level or within plant
canopy at target site
✔✔Name and describe the navigation methods - ✔✔1. Landmark - fixed objects
2. Dead reckoning - elapsed time at constant speed
3. LORAN - ground generated radio signals
4. GPS - satellite generated microwave signals
✔✔How does GPS work - ✔✔Uses satellites, satellite tracking stations, and signal
receivers to identify any spot on earth
✔✔3 main components of GPS - ✔✔1. Space segment
2. Control segment
3. User segment
✔✔What is DGPS - ✔✔Two receivers, one stationary and one mobile. Reduces C/A
signal error and improves precision
✔✔NDGPS - ✔✔Provides reliable GPS satellite data to public for free
✔✔What is main commercial DGPS - ✔✔North American omnistar company maintains
11 permanent base stations. These stations track satellites and compute corrections
every 600 milliseconds
✔✔How does omnistar locate the users receiver - ✔✔Treats receiver as a virtual base
station allowing the user to operate independently over the coverage area
✔✔Components of a basic DGPS set - ✔✔1. Light bar
2. Mobile receiver
3. GPS antenna
✔✔How does light bar help aerial application - ✔✔Allows pilot to visualize off track
errors
✔✔GPS equipment available for agricultural aircraft - ✔✔1. On board computers
2. Spray output controllers and sensors
3. Computer software that links DGPS to applicator needs
✔✔How can on board DGPS computer help aerial application - ✔✔Helps with mapping
and navigation and can suggest a spray pattern
