Ag Mechanics #2

Which of the following spray tip materials typically provides the longest wear life for pesticide applications?

• Ceramic
• Brass
• Polymer
• Stainless Steel

When pesticide is applied with a traditional boom sprayer, if all other variables remain constant, which of the following will result in a decreased chemical application rate?

• Increase the travel speed of the sprayer
• Reduce the travel speed of the sprayer
• Replace the existing nozzles with nozzles having a larger tip size
• Increase the spray pressure of the nozzle

Which of the following pesticide spray application equipment types use spinning disks or cups to break liquid into uniformly sized droplets by centrifugal force?

• Controlled droplet applicator
• Ultra low volume sprayer
• Electrostatic sprayer
• Airblast sprayer

Which of the following pesticide spray pumps delivers low volumes of 3 to 10 gallons per minute at low to moderate pressures, and will withstand abrasion for wettable powders because the pump values are the only metal components exposed to the pesticide solution?

• Diaphragm
• Centrifugal
• Gear
• Piston

When calibrating a traditional boom sprayer, if a small increase or decrease in the application rate is required, what modification to the sprayer is appropriate?

• Increase or decrease the nozzle operating pressure
• Install nozzles with larger or smaller flow rates
• Add more pesticide or more water to the chemical mixture
• Increase or decrease the height of the spray boom

When calibrating a traditional boom sprayer, if a large increase or decrease in the application rate is required, what modification to the sprayer is appropriate?

• Install nozzles with larger or smaller flow rates
• Increase or decrease the nozzle operating pressure
• Add more pesticide or more water to the chemical mixture
• Increase or decrease the height of the spray boom

A tractor mounted pesticide sprayer has a centrifugal pump that is typically driven or powered by what tractor component?

• Power take off (PTO)
• Submersible pump
• Small gasoline engine
• Electric system

Which of the following pesticide spray equipment produces a spray that is positively charged when it exits the nozzle?

• Electrostatic sprayer
• Ultra low volume sprayer
• Controlled droplet applicator
• Airblast sprayer

A pesticide spray nozzle has an operating range from 10 to 100 pounds per square inch (psi). When the operating nozzle pressure is increased from 10 psi to 40 psi, how is the output flow changed?

• Output is doubled
• Output decreases
• Output remains the same
• Output is quadrupled

When spraying wettable powder pesticides, which nozzle tip is most appropriate?

• Ceramic
• Stainless steel
• Brass
• Polymer