CFA Fertilizer Application Equipment 2 — Questions and Answers
Question 1: What is the primary purpose of a boom sprayer's pressure regulator in liquid fertilizer application?
- To increase flow rate to nozzles
- To maintain consistent operating pressure throughout the boom (Correct answer)
- To filter particulates from the solution
- To mix fertilizer concentrate with water
Correct answer: To maintain consistent operating pressure throughout the boom
A pressure regulator maintains consistent operating pressure to ensure uniform application rates across all nozzles on the boom.
Question 2: When calibrating a dry fertilizer spinner spreader, what measurement is most critical to verify?
- The speed of the spinning disc
- The height of the hopper fill
- The actual spread width and uniformity pattern (Correct answer)
- The color of the fertilizer granules
Correct answer: The actual spread width and uniformity pattern
Verifying the actual spread width and uniformity pattern ensures even coverage and prevents over- or under-application in field areas.
Question 3: Which nozzle type is best suited for reducing drift during liquid fertilizer application in windy conditions?
- Flat fan nozzle
- Hollow cone nozzle
- Air induction (venturi) nozzle (Correct answer)
- Full cone nozzle
Correct answer: Air induction (venturi) nozzle
Air induction nozzles produce large droplets with air bubbles that resist wind drift while still providing adequate coverage.
Question 4: A fertilizer applicator notices uneven streaking in the field after using a dry spinner spreader. The most likely cause is:
- Spreader moving too fast
- Worn or damaged spinner blades (Correct answer)
- Fertilizer applied in humid conditions
- Hopper overfilled beyond capacity
Correct answer: Worn or damaged spinner blades
Worn or damaged spinner blades alter the trajectory and distribution of granules, causing uneven streaking patterns.
Question 5: What does 'overlap' in fertilizer spreader operation refer to?
- Applying fertilizer twice on the same pass
- The area where adjacent spreading patterns intersect (Correct answer)
- Running the spreader beyond the field boundary
- Mixing two fertilizer products in the hopper
Correct answer: The area where adjacent spreading patterns intersect
Overlap is the intentional intersection of adjacent spread patterns to ensure uniform coverage without gaps between passes.
Question 6: Which equipment component is responsible for metering the flow rate of liquid fertilizer from a nurse tank to a boom sprayer?
- Boom shut-off valve
- Flow meter or rate controller (Correct answer)
- Agitator paddle
- Return line fitting
Correct answer: Flow meter or rate controller
A flow meter or rate controller measures and regulates the volume of liquid fertilizer delivered per unit area.
Question 7: When storing a dry fertilizer spinner spreader during the off-season, what is the most important maintenance step?
- Painting all metal surfaces
- Thoroughly cleaning and removing all fertilizer residue (Correct answer)
- Lubricating only the engine components
- Storing with a full hopper to prevent rust
Correct answer: Thoroughly cleaning and removing all fertilizer residue
Removing all fertilizer residue prevents corrosion caused by hygroscopic fertilizer salts that attract moisture and degrade metal parts.
CFA Fertilizer Application Equipment 2
What is the primary purpose of a boom sprayer's pressure regulator in liquid fertilizer application?