What are the four variables controlling spray output?

What are the four variables controlling spray output?

• A. Nozzle spacing, nozzle size, pressure, ground speed
• B. Temperature, humidity, wind, sunlight
• C. Tank mix ratio, pH, droplet size, decay rate
• D. Operator experience, time of day, equipment age, calibration

Answer: (A)

Spray output is determined by the physical settings of the spray system and how fast you move, which set how much liquid is delivered per area. Nozzle spacing determines how evenly the spray covers the turf; nozzle size fixes how much liquid can flow through per unit time; pressure affects both the flow rate and the droplet size produced; and ground speed controls how long the nozzle is over a given spot, directly changing the amount applied per area. Together, these four factors set the actual spray rate (gal or L per area). Other factors influence where the spray goes or how it behaves after it leaves the nozzle, not the immediate output. Environmental conditions like temperature, humidity, wind, and sunlight affect drift and evaporation; chemical properties like tank mix, pH, and decay relate to performance, not the rate of output; and calibration or operator factors affect accuracy and application quality but do not by themselves establish the spray rate.

Spray output is determined by the physical settings of the spray system and how fast you move, which set how much liquid is delivered per area. Nozzle spacing determines how evenly the spray covers the turf; nozzle size fixes how much liquid can flow through per unit time; pressure affects both the flow rate and the droplet size produced; and ground speed controls how long the nozzle is over a given spot, directly changing the amount applied per area. Together, these four factors set the actual spray rate (gal or L per area).

Other factors influence where the spray goes or how it behaves after it leaves the nozzle, not the immediate output. Environmental conditions like temperature, humidity, wind, and sunlight affect drift and evaporation; chemical properties like tank mix, pH, and decay relate to performance, not the rate of output; and calibration or operator factors affect accuracy and application quality but do not by themselves establish the spray rate.