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Environment ipm practice questions

25 questions from the pesticide applicator core practice test.

Environment ipm practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

What this covers

Sample questions

Which factor that the applicator controls has the greatest effect on spray drift?

  1. Tank color
  2. Brand of pump
  3. Hose length
  4. Droplet size
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D. Droplet size

Small droplets fall slowly and are carried farther by wind, so droplet size is the key factor in particle drift. It is set by nozzle type and size and by pressure.

Reference: Core Manual: Pesticides in the Environment; Application Procedures

Which change to a boom sprayer setup will reduce spray drift?

  1. Raise the pressure and use nozzles with smaller orifices
  2. Lower the pressure and use nozzles with larger orifices
  3. Raise the boom higher above the target
  4. Drive faster with the same nozzles and a higher pressure
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B. Lower the pressure and use nozzles with larger orifices

Lower pressure and larger orifices make coarser droplets that settle quickly. Higher pressure and smaller nozzles create more fine droplets, and a higher boom gives the wind more time to move them.

Reference: Core Manual: Pesticides in the Environment; Application Procedures

What is a temperature inversion?

  1. A layer of hot air at the ground rising through cooler air
  2. A layer of cool air at the ground trapped under warmer air
  3. A sudden rise in wind speed ahead of a storm
  4. A drop in humidity during the middle of the day
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B. A layer of cool air at the ground trapped under warmer air

In an inversion the air near the ground is cooler than the air above it, so it does not rise and mix. Fine droplets stay suspended in the cool layer and can move long distances as a concentrated cloud.

Reference: Core Manual: Pesticides in the Environment

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