Spray Equipment Calibration Flashcards
6 cards from real GROWSAFE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Spray Equipment Calibration flashcards as text
How often should boom sprayer nozzles be replaced?
Answer: When output exceeds the 10% wear tolerance or as recommended by the manufacturer — typically after 60-100 hours of use
Nozzle replacement should occur when wear is detected through calibration checks or when the manufacturer's recommended service life has been reached. Most sources recommend checking at 60-100 hours of use.
What is the purpose of pressure gauges on a boom sprayer?
Answer: To confirm that the spray pressure is within the range required for the nozzle type being used
Pressure gauges confirm that operating pressure is within the correct range for the nozzle type. Incorrect pressure changes droplet size and flow rate, affecting both efficacy and drift risk.
What does 'boom height' affect in terms of spray pattern quality?
Answer: Boom height determines how well the spray patterns from adjacent nozzles overlap to create uniform coverage
For flat fan nozzles, boom height must be set so that adjacent nozzle patterns overlap sufficiently to create uniform coverage. Too high or too low causes either excessive overlap or bare strips.
What is the 'tank mixing order' for preparing a spray solution?
Answer: Half fill with water, add wettable powders or flowables first, then emulsifiable concentrates, top up with water
The standard mixing order — half fill, add products in the correct sequence (typically wettable powders before emulsifiable concentrates), then top up — ensures proper dispersion and compatibility.
What safety measure must be taken before performing any maintenance on a spray boom?
Answer: Ensure the system is fully depressurised and the tank is empty before opening any fittings
Spray systems under pressure can release product suddenly when fittings are opened. The system must be fully depressurised and the tank emptied or isolated before any maintenance.
What should an operator record after each calibration check?
Answer: The date, nozzle outputs, travel speed, calculated application rate, and any adjustments made
Calibration records provide a history of sprayer performance, support traceability of application rates, and demonstrate due diligence. Detailed records are more useful than simple pass/fail notes.